Re: OT: regular expression matching multiple occurrences of one group
En Mon, 09 Nov 2009 12:59:53 -0300, Jon Clements
escribió:
On Nov 9, 1:53 pm, pinkisntwell wrote:
How can I make a regular expression that will match every occurrence
of a group and return each occurrence as a group match? For example,
for a string "-c-c-c-c-c", how can I make a regex which will return a
group match for each occurrence of "-c"?
As well as what Diez has said, unless you absolutely want regexp's,
and by the sounds of it I'm guessing you may be after something more
flexible: what about the pyparsing module [1]. It handles your
situation quite nicely.
import pyparsing
parser = pyparsing.ZeroOrMore('-c')
parser.parseString('-c-c-c-c-c-c')
(['-c', '-c', '-c', '-c', '-c', '-c'], {})
Not that I like regexes very much, but findall does exactly that:
py> re.findall('-c', '-c-c-c-c-c-c')
['-c', '-c', '-c', '-c', '-c', '-c']
Now, the OP said "return each occurrence as a group match":
py> for g in re.finditer("-c", '-c-c-c-c-c-c'): print g, g.span(),
g.group()
...
<_sre.SRE_Match object at 0x00C096E8> (0, 2) -c
<_sre.SRE_Match object at 0x00C09410> (2, 4) -c
<_sre.SRE_Match object at 0x00C096E8> (4, 6) -c
<_sre.SRE_Match object at 0x00C09410> (6, 8) -c
<_sre.SRE_Match object at 0x00C096E8> (8, 10) -c
<_sre.SRE_Match object at 0x00C09410> (10, 12) -c
--
Gabriel Genellina
--
http://mail.python.org/mailman/listinfo/python-list
Re: how to create a pip package
En Tue, 10 Nov 2009 00:48:26 -0300, Phlip escribió: I have a single file that I need my crew to pip install. When I Google for "how to create a pip package" I don't hit anything. Of course that info is out there; I can't seem to pick up the trail of breadcrumbs to it. See http://pip.openplans.org/ You're looking for the "freeze" command. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: on "Namespaces"
On Sun, 08 Nov 2009 13:20:23 -0800, webtourist wrote: > New bie Question: > in "Zen of Python" - what exactly does the last one mean ? - Namespaces > are one honking great idea -- let's do more of those! > > I mean why the emphasis ? Is it like saying "put modules into packages" > in other programming paradigm s ? Modules are namespaces. So are packages. Classes and class instances are namespaces. Even function scopes are namespaces. When you write: n = None def spam(n): print "spam" * n def ham(n): print "ham" * n the n inside spam() and ham() and the global n are in different namespaces, and so independent. http://en.wikipedia.org/wiki/Namespace http://docs.python.org/tutorial/classes.html#python-scopes-and-namespaces -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Most efficient way to "pre-grow" a list?
En Sun, 08 Nov 2009 10:08:35 -0300, gil_johnson
escribió:
On Nov 6, 8:46 pm, gil_johnson wrote:
The problem I was solving was this: I wanted an array of 32-bit
integers to be used as a bit array, and I wanted it initialized with
all bits set, that is, each member of the array had to be set to
4294967295. Of course, you could set your initializer to 0, or any
other 32-bit number.
Originally I found that the doubling method I wrote about before was a
LOT faster than appending the elements one at a time, and tonight I
tried the "list = initializer * N" method. Running the code below, the
doubling method is still fastest, at least on my system.
Of course, as long as you avoid the 'one at a time' method, we're
talking about fractions of a second, even for arrays that I think are
huge, like the 536,870,912 byte beastie below.
I don't get your same results; one_item*N is faster on my tests. Note that
you're comparing disparate things:
# Doubling method, run time = 0.413938045502
newArray = array.array('I') # 32-bit unsigned
integers
Method 1 creates an array object; this takes roughly 2**29 bytes
# One at a time, run time = 28.5479729176
newArray2 = array.array('I')
for i in range(134217728):# the same size as above
newArray2.append(4294967295)
This creates also an array object, *and* 134 million integer objects in
the meantime.
# List with "*", run time = 1.06160402298
newList = [4294967295] * 134217728
And this creates a list object, not an array.
Note that all your 3 methods create global objects and you never delete
them - so the last method is at a disadvantage.
A more fair test would use timeit, and run just one method at a time:
# Written in Python 3.x
# use xrange everywhere with Python 2.x
import array
INITIAL_VALUE = 4294967295
LOG2SIZE=25
SIZE = 2**LOG2SIZE
def method1a():
newArray = array.array('I')
newArray.append(INITIAL_VALUE)
for i in range(LOG2SIZE):
newArray.extend(newArray)
assert len(newArray)==SIZE
assert newArray[SIZE-1]==INITIAL_VALUE
def method2a():
newArray = array.array('I')
for i in range(SIZE):
newArray.append(INITIAL_VALUE)
assert len(newArray)==SIZE
assert newArray[SIZE-1]==INITIAL_VALUE
def method3a():
newArray = array.array('I', [INITIAL_VALUE]) * SIZE
assert len(newArray)==SIZE
assert newArray[SIZE-1]==INITIAL_VALUE
def method1l():
newList = [INITIAL_VALUE]
for i in range(LOG2SIZE):
newList.extend(newList)
assert len(newList)==SIZE
assert newList[SIZE-1]==INITIAL_VALUE
def method2l():
newList = []
for i in range(SIZE):
newList.append(INITIAL_VALUE)
assert len(newList)==SIZE
assert newList[SIZE-1]==INITIAL_VALUE
def method3l():
newList = [INITIAL_VALUE] * SIZE
assert len(newList)==SIZE
assert newList[SIZE-1]==INITIAL_VALUE
D:\temp>python31 -m timeit -s "from arraygrow import method1a" "method1a()"
10 loops, best of 3: 411 msec per loop
D:\temp>python31 -m timeit -s "from arraygrow import method2a" "method2a()"
...aborted, too long...
D:\temp>python31 -m timeit -s "from arraygrow import method3a" "method3a()"
10 loops, best of 3: 377 msec per loop
D:\temp>python31 -m timeit -s "from arraygrow import method1l" "method1l()"
10 loops, best of 3: 628 msec per loop
D:\temp>python31 -m timeit -s "from arraygrow import method3l" "method3l()"
10 loops, best of 3: 459 msec per loop
So arrays are faster than lists, and in both cases one_item*N outperforms
your doubling algorithm.
Adding one item at a time is -at least- several hundred times slower; I
was not patient enough to wait.
Finally, I just looked into calling C functions, and found
PyMem_Malloc, PyMem_Realloc, PyMem_Free, etc. in the Memory Management
section of the Python/C API Reference Manual. This gives you
uninitialized memory, and should be really fast, but it's 6:45 AM
here, and I don't have the energy to try it.
No, those are for internal use only, you can't use the resulting pointer
in Python code. An array object is a contiguous memory block, so you don't
miss anything.
--
Gabriel Genellina
--
http://mail.python.org/mailman/listinfo/python-list
Re: sort values from dictionary of dictionaries python 2.4
On Mon, 09 Nov 2009 06:02:09 -0800, J Wolfe wrote: > Hi, > > I would like to sort this dictionary by the values of the inner > dictionary ‘ob’ key. You can't sort dictionaries in Python, because they are unordered hash tables. Giving up the ability to store items in order is one of the things which makes them so fast. You have five choices: (1) Create your own implementation of a sortable dictionary, perhaps using a red-black tree or similar. Unless you write it in C, expect it to be massively slower than the built-in dict type. If you write it in C, expect it to be merely slower than the built-in dict type. (2) Write small helper functions that sort the keys from the dict when you need them sorted. Since you (probably) only have a small number of items in each dict, it should be fast. (3) Use a subclass of dict that sorts the items as needed. (4) Give up on using dictionaries for this, and use some other mapping, like a list of (key, value) tuples. Expect it to be massively slower than the built-in dict type. (5) Give up on the need to have them sorted. My advice is to go with #2, 3 or 5. Here's a basic version of 3 to get you started: class SortedDict(dict): # Untested. def items(self): """Return items of self in sorted order.""" L = super(SortedDict, self).items() L.sort() return L You may even find a version with an appropriate licence you can freely use if you google for "Python Sorted Dict". -- Steven -- http://mail.python.org/mailman/listinfo/python-list
how to create a pip package
Py hont: I have a single file that I need my crew to pip install. When I Google for "how to create a pip package" I don't hit anything. Of course that info is out there; I can't seem to pick up the trail of breadcrumbs to it. While I'm looking, could someone push the link in here? Purely for posterity? Thanks! -- Phlip http://c2.com/cgi/wiki?ZeekLand -- http://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to get the Physical memory address of a variable in python?
On Nov 9, 4:47 pm, Ognjen Bezanov wrote: > Hello all, > > Say I have a python variable: > > a = "hello" > > Is it possible for me to get the physical address of that variable (i.e. > where it is in RAM)? > > I know that id(a) will give me it's memory address, but the address > given does not seem to correlate with the physical memory. Is this even > possible? I'm going to guess that A. You don't really want physical address but logical address (i.e., the address where you might access the memory with a C pointer), and B. You want the address not of the object itself, but of the data within (that is, you'd want the "pointer" you receive to point to the ASCII string hello) Python's way to handle cases like this is called buffer protocol, but it only operates at the C-extension level. There is a set of functions in the C API that look like this PyObject_AsReadBuffer(obj,**buffer,*len) Calling this will return the address of the string "hello" in *buffer. See C API Reference Manual for more details. This function can also be called from ctypes, but I don't remember the exact procedure for modifying input arguments through a pointer. Note: If you really want a PHYSCIAL RAM address you'll have to make some OS-specific system call (I think) with the logical address, probably needing superuser privileges. Obviously this call isn't exposed in Python, because there's no use for it in Python. Unless you're programming DMA transfers or something like that, there's no use for it in C, either. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to get the Physical memory address of a variable in python?
Benjamin Kaplan wrote: On Mon, Nov 9, 2009 at 7:47 PM, Ognjen Bezanov wrote: Hello all, Say I have a python variable: a = "hello" Is it possible for me to get the physical address of that variable (i.e. where it is in RAM)? I know that id(a) will give me it's memory address, but the address given does not seem to correlate with the physical memory. Is this even possible? Thank you! Ognjen When you use Python, program in Python and not C. What do you need the memory location of a variable for? Python, like Java and .NET is a higher level language. You're not supposed to worry about things like the physical location in memory. There's probably some ugly hack using ctypes, or just writing the code in C but I don't know enough about Python's C API to know what it is. FWIW, even the id(x) == address of x is only an implementation detail of CPython. Other Python implementations don't use that scheme. Following is for the CPython implementation. As Benjamin says, each implementation can do different things, as long as the documented semantics are preserved. The "variable" aaa is not at any particular location, and will quite likely move when you define a new "variable" bbb or ccc in the same scope. aaa is just a dictionary entry after all, in some scope. (Although it may be optimized, for locals, and for slots) aaa is bound to a particular object, and that object won't move. That object has an id() value, and I believe that id value is the address. And when you bind aaa to a different object, there'll be a different id() and address. But unless you're writing a C extension, the actual address is kind of irrelevant, isn't it? DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Debugging python in emacs isn't working.
On Nov 8, 6:36 pm, menomnon wrote: > Hi, > > Emacs 22.3, python 2.6.4 > > Put the following into my .emacs: > > (setq pdb-path 'c:\\python26\\lib\\pdb.py > gud-pdb-command-name (symbol-name pdb-path)) > (defadvice pdb (before gud-query-cmdline activate) > "Provide a better default command line when called interactively." > (interactive > (list (gud-query-cmdline pdb-path > (file-name-nondirectory buffer-file-name) > > So when I'm in a python buffer (I've tried both python.el and python- > mode.el) and do M-x pdb I get, say: > > c:\python26\lib\pdb.py rpytest.py > > hit and get an empty buffer that says "Comint: no process". And > the status line says: "Spawning child process: invalid argument". > > I've run into "spawning child process: invalid argument" before but > not being an emacs uber-geek I never solved it directly. > > Hope someone has an idea of what I'm doing wrong. python -i. It's the -i part that's important. -- http://mail.python.org/mailman/listinfo/python-list
Re: comparing alternatives to py2exe
En Fri, 06 Nov 2009 17:00:17 -0300, Philip Semanchuk escribió: On Nov 3, 2009, at 10:58 AM, Jonathan Hartley wrote: Recently I put together this incomplete comparison chart in an attempt to choose between the different alternatives to py2exe: http://spreadsheets.google.com/pub?key=tZ42hjaRunvkObFq0bKxVdg&output=html I was interested in py2exe because we'd like to provide a one download, one click install experience for our Windows users. I think a lot of people are interested in py2exe for the same reason. Well, one thing that I came across in my travels was the fact that distutils can create MSIs. Like py2exe, MSIs provide a one download, one click install experience under Windows and therefore might be a replacement for py2exe. But py2exe and .msi are complementary, not a replacement. py2exe collects in one directory (or even in one file in some cases) all the pieces necesary to run your application. That is, Python itself + your application code + all referenced libraries + other required pieces. The resulting files must be installed in the client machine; you either build a .msi file (a database for the Microsoft Installer) or use any other installer (like InnoSetup, the one I like). For me, the following command was sufficient to create an msi, although it only worked under Windows (not under Linux or OS X): python setup.py bdist_msi The resulting MSI worked just fine in my extensive testing (read: I tried it on one machine). The resulting .msi file requires Python already installed on the target machine, if I'm not mistaken. The whole point of py2exe is to avoid requiring a previous Python install. It seems, then, that creating an MSI is even within the reach of someone like me who spends very little time in Windows-land, so it might be worth a column on your chart alongside rpm/deb. As said in http://wiki.python.org/moin/DistributionUtilities the easiest way is to use py2exe + InnoSetup. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Serious Privileges Problem: Please Help
Victor Subervi wrote: On Mon, Nov 9, 2009 at 2:30 PM, Victor Subervi wrote: On Mon, Nov 9, 2009 at 2:27 PM, Rami Chowdhury wrote: Hold everything. Apparently line-endings got mangled. What I don't understand is why I didn't see them when I opened the file to edit, and why they didn't copy and paste when I did that. But dos2unix cleaned up a couple of files so I presume it will clean up the rest. However, I tried one file, that reads exactly the same as index.py, and when I surfed to it got a 500 error. Here's what the log said: What I've diagnosed as happening when a python script with Windows line-ending was posted on my server's cgi environment: The actual error seemed to be a failure to find the python interpreter, since some Unix shells take the shebang line to include the \r character that preceded the newline. Seems to me they could be more tolerant, since I don't think control characters are likely in the interpreter file name. DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: pythonw.exe under Windows-7 (Won't run for one admin user)
On Fri, 06 Nov 2009 21:19:44 -, SD_V897 wrote: Rhodri James wrote: On Tue, 03 Nov 2009 16:00:16 -, SD_V897 wrote: I have a perplexing issue, I have four users set up on a W7 computer. The program runs fine for all users except the admin user who needs it for school assignments. A little more information, please. How does it not work for the admin user? Is there a traceback? What do you get if you try to invoke it from a command line? Hi Rhodri, here's a dump file, don't know if this helps or not.. So Windows is reporting a crash, then. I'll repeat my last question in particular; what happens when your admin user runs the program you're trying to invoke from the command line? -- Rhodri James *-* Wildebeest Herder to the Masses -- http://mail.python.org/mailman/listinfo/python-list
Re: NEWB problem with urllib2
Thanks Simon!
You are right.. I also believe it is something with Eclipse.
I've been working since... the module below runs.. but Eclipse is
still showing an error when I reference urlopen with a little red X...
saying it is an undefined variable in the IDE.. but not giving me an
runtime errors.
#URL LIBRARY
from urllib2 import *
def openfilereadaline(a):
f = open(a)
print f
for line in f:
print line.rstrip()
f.close()
def openWebSite(a):
ur = urlopen(a) #open url
contents = ur.readlines()#readlines from url file
fo = open("test.txt", "w")#open test.txt
for line in contents:
print "writing %s to a file" %(line,)
fo.write(line)#write lines from url file to text file
fo.close()#close text file
if __name__ == '__main__':
openWebSite("http://www.daniweb.com/forums/thread161312.html";)
print "Hello World"
--
http://mail.python.org/mailman/listinfo/python-list
Re: on "Namespaces"
On Sun, 08 Nov 2009 21:20:23 -, webtourist wrote: New bie Question: in "Zen of Python" - what exactly does the last one mean ? - Namespaces are one honking great idea -- let's do more of those! I mean why the emphasis ? Is it like saying "put modules into packages" in other programming paradigm s ? Like all things zen, 'meaning' as applied to this koan is a shifting concept best considered after deep meditiation on... oh, who am I kidding. If you keep names in separate namespaces, you are less likely to screw up by forgetting that you meant something else by that name 30 lines above. It's less about "put modules in packages" and more about "put code in modules." Corollary: what happens after "from somewhere import *" is all your own fault. -- Rhodri James *-* Wildebeest Herder to the Masses -- http://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to get the Physical memory address of a variable in python?
Ognjen Bezanov wrote: Hello all, Say I have a python variable: a = "hello" Is it possible for me to get the physical address of that variable (i.e. where it is in RAM)? I know that id(a) will give me it's memory address, but the address given does not seem to correlate with the physical memory. Is this even possible? Python doesn't have variables as such. The variable's name is just a key in a dict and the variable's value is the corresponding value for that key (or, to be exact, a reference to the value). A particular value can be referred to by any number of 'variables'. -- http://mail.python.org/mailman/listinfo/python-list
Re: NEWB problem with urllib2
On Mon, Nov 9, 2009 at 6:29 PM, Penn wrote:
> I just installed PyDev into Eclipse using the 'update' method and did
> the standard installation. I allowed it to Auto Configure itself and
> ran a "Hello World" module to make sure I was in the ballpark.
>
> I got an starting module up and have run "Hello World" but now am
> stuck on getting urlopen to import from urllib2 for the following
> example.
>
> from urllib2 import * # doesn't give me an error
> ur = urlopen("http://www.daniweb.com/forums/thread161312.html";) #
> gives me Undefined Variable: urlopen
>
> so I tried just
>
> import urllib2 # Eclipse gives "Unresolved Import"
>
> Is urllib2 not on my path? Isn't urllib2 in the standard installation
> and shouldn't that automatically be on my path? If not, how can I get
> it on the path?
>
> ThankS!!
This sounds more like a PyDev and/or Eclipse problem than an urllib2 problem. :)
One thing you can check: open the "raw" python interpreter outside of
Eclipse and try importing urllib2 there. You might also try the
interpreter interface within Eclipse (if it provides one.)
HTH
--
http://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to get the Physical memory address of a variable in python?
On Mon, Nov 9, 2009 at 7:47 PM, Ognjen Bezanov wrote: > Hello all, > > Say I have a python variable: > > a = "hello" > > Is it possible for me to get the physical address of that variable (i.e. > where it is in RAM)? > > I know that id(a) will give me it's memory address, but the address given > does not seem to correlate with the physical memory. Is this even possible? > > > Thank you! > > > Ognjen > When you use Python, program in Python and not C. What do you need the memory location of a variable for? Python, like Java and .NET is a higher level language. You're not supposed to worry about things like the physical location in memory. There's probably some ugly hack using ctypes, or just writing the code in C but I don't know enough about Python's C API to know what it is. FWIW, even the id(x) == address of x is only an implementation detail of CPython. Other Python implementations don't use that scheme. > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Is it possible to get the Physical memory address of a variable in python?
Hello all, Say I have a python variable: a = "hello" Is it possible for me to get the physical address of that variable (i.e. where it is in RAM)? I know that id(a) will give me it's memory address, but the address given does not seem to correlate with the physical memory. Is this even possible? Thank you! Ognjen -- http://mail.python.org/mailman/listinfo/python-list
Re: is None or == None ?
On Sun, 08 Nov 2009 19:45:31 -, Terry Reedy wrote: I believe the use of tagged pointers has been considered and so far rejected by the CPython developers. And no one else that I know of has developed a fork for that. It would seem more feasible with 64 bit pointers where there seem to be spare bits. But CPython will have to support 32 bit machines for several years. I've seen that mistake made twice (IBM 370 architecture (probably 360 too, I'm too young to have used it) and ARM2/ARM3). I'd rather not see it a third time, thank you. -- Rhodri James *-* Wildebeest Herder to the Masses -- http://mail.python.org/mailman/listinfo/python-list
Re: Indentation problems
I'm going to make a whole bunch of wild guesses here, since you don't give us a lot to go on. Wild Guess #1: you're using IDLE. On Sun, 08 Nov 2009 19:01:37 -, Ray Holt wrote: I am having problems with indentation some times. When I hit the enter key after if statements or while statemt there are times when the indentation is too much Wild Guess #2: you've forgotten to close a bracket of some sort. and other times too little. Wild Guess #3: you've forgotten the colon on the end of the line When I try to manually make sure the indentation is correct and try to print, I ge the error message of invalid syntax or incorrect indentation. Ah. Wild Guess 1a: you're using IDLE in interactive mode. In that case, bear in mind Wild Guesses 2 and 3, but they aren't the whole story. In interactive mode, IDLE executes the code that you type Right Now This Instant And No Messing. When you type a compound statement like "if" or "while", that presents a bit of a problem since the statement isn't really finished until you've typed in all the statements that belong to that "if" or "while". Knowing this, IDLE puts off executing it, and helpfully adds the indentation that it knows you'll need. If you fiddle with that extra space and delete too much of it (easily done here), IDLE will tick you off for getting your indentation wrong. If you hit Return without typing anything else, IDLE will do exactly the same thing since it knows Python requires you to have at least one statement inside the "if". Once you've typed that one statement, you can carry on typing more to your hearts content; at this point, IDLE treats a blank line as meaning "I'm done." At this point it goes away and executes what you've typed Right Now This Instant And No Messing, and may end up complaining about something you got wrong three lines ago. Can someone help me. Also when I open the edit window instead of the shell the programs tend not to run. Help! Ray Well, no. Unlike the interactive window, typing into the edit window doesn't cause anything to be executed Right Now Etc Etc. It doesn't even cause anything to be executed Sometime Soon Honest Guv'nor. It just saves up what you've done so that it can be run later, assuming you remember to save it to a file. Unlike the interactive window, you can go back and change what you've written earlier to correct a mistake, and re-run the entire script rather than type it in again line by line. To actually run your program you have two alternatives. Either you can use the "Run Module" entry in the "Run" menu (F5 on my version: it may be called something slightly different in a slightly different menu with a slightly different shortcut key depending on your operating system and which version of IDLE you're running), or you can pull up a console (command line, terminal, xterm, whatever your OS calls it) and invoke Python on your file directly. If that last bit didn't make any sense to you, don't worry, just leave that particular adventure in computing for another day. -- Rhodri James *-* Wildebeest Herder to the Masses -- http://mail.python.org/mailman/listinfo/python-list
Socket programming with NetCom serial-to-ethernet module
Hi, This is my first Python-list post; I hope it's going to the right place. Here's my problem: I've read many tutorials on socket programming, but I can't seem to piece them together for my particular case. I have 3 serial ports, each of which individually connects to a port on a NetCom box, which converts them to TCP/IP ports (see e.g. http://www.serialgear.com/4--Port-Serial-TCP-IP-NETCOM-411.html). But I'll just focus on communicating with 1 serial port right now (assume that I have a 1-port NetCom box). So, the flow pattern goes like this -- ascii string from my Python program via the ethernet card to the NetCom box, which feeds the serial port; this serial port is the input/output to a board that controls a motor. So, I can send an ascii string like "MI100\n", which tells that motor to move 100 steps. Currently, I can accomplish this using sockets. But if I instead want to request something from the motor, like it's current position, how do I return this information back to my Python program and still keep the socket alive and listening for say another position request? FYI, the NetCom box works on DHCP. So, I could use 'arp' or another method to actually find it's IP address, and I can connect to it using say port 2000. At this point, it looks as if I would setup a server socket for the NetCom box, and then create a client socket for the motor controller board to talk to the NetCom box (and e.g. give the current position of the motor, upon my request). But the hard part seems to be how to retrieve that information from the controller board, once it responds. For instance, if I were to just use pySerial, I open up a connection to the serial port, then serial.send(ascii) sends the request, and serial.readline() reads the response. I need to know how to implement this basic functionality with sockets, where the sockets remain alive and listening after each request/response, just as pySerial does. Any advice, sockets or not, is helpful and appreciated, and I can elaborate further on the problem, if requested. (Again, I hope this was not a misuse of the list in some way; I apologize, if so). Many thanks. -Ryan -- http://mail.python.org/mailman/listinfo/python-list
Re: PiCloud Beta Release
On Thu, Nov 5, 2009 at 3:19 PM, Jacob Shaw wrote: > On Nov 1, 5:13 pm, Ken Elkabany wrote: >> Hello, >> >> PiCloud has just released a Python library, cloud, which allows you to >> easily offload the execution of a function to a cluster of servers >> running on Amazon Web Services. As a beta product, we are currently >> free to all users who sign up with beta code "PYTHONLIST". To >> register, go tohttp://www.picloud.com >> >> Full service description: >> PiCloud is a cloud-computing platform that integrates into the Python >> Programming Language. It enables you to leverage the compute power of >> Amazon Web Services without having to manage, maintain, or configure >> virtual servers. >> >> PiCloud integrates seamlessly into your existing code base through a >> custom Python library, cloud. To offload the execution of a function >> to the cloud, all you must do is pass your desired function into the >> cloud library. PiCloud will then run the function on its >> high-performance and automatically-scaling cluster. We quickly scale >> our server capacity, both up and down, to meet your computational >> needs, and only charge you for the resources you actually consume. >> Getting on the cloud has never been this easy! >> >> PiCloud improves the full cycle of software development and >> deployment. Functions that are run on PiCloud have their resource >> usage monitored, performance analyzed, and errors traced; we further >> aggregate all your functions to give you a bird's eye view of your >> service. Through these introspective capabilities, PiCloud enables you >> to develop faster, easier, and smarter. >> >> Common use cases for our platform: >> * Crawling the web >> * Manipulating images and videos >> * Generating charts and graphs >> * Statistical/Mathematical analysis of data sets >> * Real-time data processing >> >> Cheers, >> >> Ken Elkabany >> PiCloud, Inc. > > Wow, amazing service. I used PiCloud for some scraping work, and my > script ran about 10x as fast. > > Some questions though: > 1) I have another project which uses a custom python extension written > in C++. Is there a way to use it on PiCloud? > 2) I noticed you guys only support python 2.5 and 2.6. Will there be > 3.1 support eventually? > -- > http://mail.python.org/mailman/listinfo/python-list > Thanks for the compliments. 1) PiCloud will not automatically transfer libraries that require python C++ extensions. However, in your control panel, you can upload a tarball or synchronize an svn repository that contains your extension's code and we'll automatically compile/install it on our systems. 2) We are currently working on support for python 3.x (we've had requests from a fair number of users), and plan to release a compatible client library in a couple of weeks. Ken -- http://mail.python.org/mailman/listinfo/python-list
NEWB problem with urllib2
I just installed PyDev into Eclipse using the 'update' method and did
the standard installation. I allowed it to Auto Configure itself and
ran a "Hello World" module to make sure I was in the ballpark.
I got an starting module up and have run "Hello World" but now am
stuck on getting urlopen to import from urllib2 for the following
example.
from urllib2 import *# doesn't give me an error
ur = urlopen("http://www.daniweb.com/forums/thread161312.html";) #
gives me Undefined Variable: urlopen
so I tried just
import urllib2# Eclipse gives "Unresolved Import"
Is urllib2 not on my path? Isn't urllib2 in the standard installation
and shouldn't that automatically be on my path? If not, how can I get
it on the path?
ThankS!!
--
http://mail.python.org/mailman/listinfo/python-list
Re: Can't Find Module
On Sat, 07 Nov 2009 16:59:29 -, Victor Subervi wrote: ImportError: No module named template [snip] I can import this just fine from the python command prompt. So, what gives? Is template.py in your current directory when you run the script from the command line? -- Rhodri James *-* Wildebeest Herder to the Masses -- http://mail.python.org/mailman/listinfo/python-list
Re: IDLE python shell freezes after running show() of matplotlib
On Oct 28, 11:09 pm, Chris Colbert wrote: > This is a threading issue that is very common when using gui toolkits > with the interactive interpreter. > > You're better off just using ipython, which already has builtin > support for matplotlib when you start it via "ipython -pylab" > > On Wed, Oct 28, 2009 at 7:41 PM, OKB (not okblacke) > > > > wrote: > > Forrest Sheng Bao wrote: > > >> I am having a weird problem on IDLE. After I plot something using show > >> () of matplotlib, the python shell prompt in IDLE just freezes that I > >> cannot enter anything and there is no new ">>>" prompt show up. I > >> tried ctrl - C and it didn't work. I have to restart IDLE to use it > >> again. > > >> My system is Ubuntu Linux 9.04. I used apt-get to install IDLE. > > > I believe this is the intended behavior. Look in matplotlib > > documentation on the difference between interactive and non-interactive > > modes. > > > -- > > --OKB (not okblacke) > > Brendan Barnwell > > "Do not follow where the path may lead. Go, instead, where there is > > no path, and leave a trail." > > --author unknown > > -- > >http://mail.python.org/mailman/listinfo/python-list Same problem for me using IDLE 1.2.4, python 2.5.4, and matplotlib 0.99.1.1. Windows XP 32bit. Turning on interactive mode solved the problem with IDLE freezing, however the plot window still comes up empty and frozen. Using iPython now with no problems so far. Hopefully the problem with IDLE gets fixed. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to set the range for x-axis
On Nov 9, 8:45 pm, Robert Kern wrote: > On 2009-11-09 10:43 AM, Moses wrote: > > > > > Hi Chris, > > > I am using python 2.6 and am using scipy and pylab. See the code below. > > You will want to ask matplotlib questions on the matplotlib mailing list: > > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > -- > Robert Kern > > "I have come to believe that the whole world is an enigma, a harmless enigma > that is made terrible by our own mad attempt to interpret it as though it > had > an underlying truth." > -- Umberto Eco import matplotlib.pyplot as plt plt.xlim(0., 1.) -- http://mail.python.org/mailman/listinfo/python-list
Re: Serious Privileges Problem: Please Help
On Mon, Nov 9, 2009 at 2:30 PM, Victor Subervi wrote:
>
> On Mon, Nov 9, 2009 at 2:27 PM, Rami Chowdhury
> wrote:
>
>> On Mon, 09 Nov 2009 11:24:33 -0800, Victor Subervi <
>> victorsube...@gmail.com> wrote:
>>
>> On Mon, Nov 9, 2009 at 1:53 PM, Rami Chowdhury >> >wrote:
>>>
>>> On Mon, 09 Nov 2009 10:36:31 -0800, Victor Subervi <
victorsube...@gmail.com> wrote:
Of course. Let me start with some updates to httpd.conf, which didn't
help
> anyway:
>
>
> ServerAdmin m...@creative.vi
> DocumentRoot /var/www/html/angrynates.com
> ServerName angrynates.com
> Options +ExecCGI -IncludesNoExec
>
> Options +ExecCGI
> AllowOverride All
> AllowOverride FileInfo
> #AddHandler mod_python .py
> #PythonHandler mod_python.publisher
> #PythonDebug On
> AddHandler cgi-script .cgi .py
> Options Includes Indexes SymLinksIfOwnerMatch ExecCGI
>
> SecFilterEngine Off
>
>
> SecRuleEngine Off
>
> AddHandler cgi-script .cgi .py
> Options Includes Indexes SymLinksIfOwnerMatch ExecCGI
>
>
> SecFilterEngine Off
>
>
> SecRuleEngine Off
>
>
>
>
>
> Here's index.py:
>
> #!/usr/bin/python
>
> import string
> import cgitb; cgitb.enable()
> import cgi
> import sys,os
> sys.path.append(os.getcwd())
> from template import template
>
> ourFile = string.split(__file__, "/")
> page = ourFile[len(ourFile) - 1][:-3]
>
> form = cgi.FieldStorage()
> w = form.getfirst('w', '1024')
>
> template(page, w)
>
>
>
> Can you try running index.py from the command-line, and let me know if
that
works?
>>> It runs fine. So I created a test file of the same, chmod and tried it on
>>> my
>>> browser. Rendered. So I deleted index.py and recreated it from the
>>> command
>>> line, chmod. Rendered! Apparently, somehow in the translation from
>>> uploading
>>> it via ftp to moving the files to a new dir, something got screwed up in
>>> the
>>> permissions that I can't see! Any idea what the heck that could possibly
>>> be??
>>> TIA,
>>> V
>>>
>>
>> What platform did you upload from? Something as seemingly insignificant as
>> Windows line-endings can mess up file execution...
>>
>
> OS is Windoze XL. Have we caught the thief? How can I upload from this box
> and not have this problem, or undo it at the server? You know, of course, I
> don't see this line-ending from the command prompt when I vi it.
> TIA,
> V
>
> Hold everything. Apparently line-endings got mangled. What I don't
understand is why I didn't see them when I opened the file to edit, and why
they didn't copy and paste when I did that. But dos2unix cleaned up a couple
of files so I presume it will clean up the rest. However, I tried one file,
that reads exactly the same as index.py, and when I surfed to it got a 500
error. Here's what the log said:
[Mon Nov 09 12:30:27 2009] [notice] mod_python: (Re)importing module
'mptest'
[Mon Nov 09 12:30:27 2009] [error] [client 98.189.137.242] PythonHandler
mptest: Traceback (most recent call last):, referer:
http://www.angrynates.com/global_solutions/
[Mon Nov 09 12:30:27 2009] [error] [client 98.189.137.242] PythonHandler
mptest: File "/usr/lib64/python2.4/site-packages/mod_python/apache.py",
line 287, in HandlerDispatch\nlog=debug), referer:
http://www.angrynates.com/global_solutions/
[Mon Nov 09 12:30:27 2009] [error] [client 98.189.137.242] PythonHandler
mptest: File "/usr/lib64/python2.4/site-packages/mod_python/apache.py",
line 461, in import_module\nf, p, d = imp.find_module(parts[i], path),
referer: http://www.angrynates.com/global_solutions/
[Mon Nov 09 12:30:27 2009] [error] [client 98.189.137.242] PythonHandler
mptest: ImportError: No module named mptest, referer:
http://www.angrynates.com/global_solutions/
Huh? Got no "mptest" anywhere. Not even using mod_python. Why doesn't it
refer to a specific file in the folder? Any ideas on this one?
TIA,
V
>
>>
>>
>> --
>> Rami Chowdhury
>> "Never attribute to malice that which can be attributed to stupidity" --
>> Hanlon's Razor
>> 408-597-7068 (US) / 07875-841-046 (UK) / 0189-245544 (BD)
>>
>
>
--
http://mail.python.org/mailman/listinfo/python-list
Re: [PYTHON] How to set the range for x-axis
On 2009-11-09 10:43 AM, Moses wrote: Hi Chris, I am using python 2.6 and am using scipy and pylab. See the code below. You will want to ask matplotlib questions on the matplotlib mailing list: https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: [PYTHON] How to set the range for x-axis
On Mon, Nov 9, 2009 at 11:46 AM, Moses wrote: > Hi Chris, > > The code is > > from scipy import * > from pylab import * > > x = [0.5,0.6,0.7,0.8,0.9,1.0] > y = [2,6,8,10,10,10] > > plot(x,y,linewidth=5.0) > show() > > and not > > from scipy import * > from pylab import * > > x1 = [0.5,0.6,0.7,0.8,0.9,1.0] > x2 = [0,1,2,3,4,5,6,7,8,9,10] > > plot(x1,y01,linewidth=5.0) > show() > Don't top-post use: axis([xmin,xmax,ymin,ymax]) See the documentation for details -- http://mail.python.org/mailman/listinfo/python-list
Re: Choosing GUI Module for Python
Having tried most of the options out there, personaly I've settled on two. I use Tkinter for ver simple GUIs such as single dialog boxes or results displays. The advantage of it being built-in to Python outweighs it's limitations. For anything more complex, I go for PyQT every time. QTDesigner is a full drag-and-drop GUI builder that rivals Visual Studio, and PyQT comes with a script to convert QTDesigner XML files into Python code, which you then subclass in your own script and attach your own code to the GUI widgets. There's a longer learning curve than Tkinter, but it's very much worth it for access to QTs mature and rich framework, with excellent professional-class documentation. Sorry, but wxWidgets which I have used doesn't come anywhere close. The main objection to using PyQT untill now was that for commercial development you needed to buy a license (it was free for GPL projects). That's rapidly becoming a non-issue as the core QT framework is now LGPL and Nokia have a project underway to produce PyQT compatible LGPL python bindings under the PySide project. Simon Hibbs -- http://mail.python.org/mailman/listinfo/python-list
Re: Serious Privileges Problem: Please Help
On Mon, 09 Nov 2009 11:24:33 -0800, Victor Subervi
wrote:
On Mon, Nov 9, 2009 at 1:53 PM, Rami Chowdhury
wrote:
On Mon, 09 Nov 2009 10:36:31 -0800, Victor Subervi <
victorsube...@gmail.com> wrote:
Of course. Let me start with some updates to httpd.conf, which didn't
help
anyway:
ServerAdmin m...@creative.vi
DocumentRoot /var/www/html/angrynates.com
ServerName angrynates.com
Options +ExecCGI -IncludesNoExec
Options +ExecCGI
AllowOverride All
AllowOverride FileInfo
#AddHandler mod_python .py
#PythonHandler mod_python.publisher
#PythonDebug On
AddHandler cgi-script .cgi .py
Options Includes Indexes SymLinksIfOwnerMatch ExecCGI
SecFilterEngine Off
SecRuleEngine Off
AddHandler cgi-script .cgi .py
Options Includes Indexes SymLinksIfOwnerMatch ExecCGI
SecFilterEngine Off
SecRuleEngine Off
Here's index.py:
#!/usr/bin/python
import string
import cgitb; cgitb.enable()
import cgi
import sys,os
sys.path.append(os.getcwd())
from template import template
ourFile = string.split(__file__, "/")
page = ourFile[len(ourFile) - 1][:-3]
form = cgi.FieldStorage()
w = form.getfirst('w', '1024')
template(page, w)
Can you try running index.py from the command-line, and let me know if
that
works?
It runs fine. So I created a test file of the same, chmod and tried it
on my
browser. Rendered. So I deleted index.py and recreated it from the
command
line, chmod. Rendered! Apparently, somehow in the translation from
uploading
it via ftp to moving the files to a new dir, something got screwed up in
the
permissions that I can't see! Any idea what the heck that could possibly
be??
TIA,
V
What platform did you upload from? Something as seemingly insignificant as
Windows line-endings can mess up file execution...
--
Rami Chowdhury
"Never attribute to malice that which can be attributed to stupidity" --
Hanlon's Razor
408-597-7068 (US) / 07875-841-046 (UK) / 0189-245544 (BD)
--
http://mail.python.org/mailman/listinfo/python-list
Re: Serious Privileges Problem: Please Help
On Mon, Nov 9, 2009 at 1:53 PM, Rami Chowdhury wrote:
> On Mon, 09 Nov 2009 10:36:31 -0800, Victor Subervi <
> victorsube...@gmail.com> wrote:
>
> Of course. Let me start with some updates to httpd.conf, which didn't help
>> anyway:
>>
>>
>> ServerAdmin m...@creative.vi
>> DocumentRoot /var/www/html/angrynates.com
>> ServerName angrynates.com
>> Options +ExecCGI -IncludesNoExec
>>
>> Options +ExecCGI
>> AllowOverride All
>> AllowOverride FileInfo
>> #AddHandler mod_python .py
>> #PythonHandler mod_python.publisher
>> #PythonDebug On
>> AddHandler cgi-script .cgi .py
>> Options Includes Indexes SymLinksIfOwnerMatch ExecCGI
>>
>> SecFilterEngine Off
>>
>>
>> SecRuleEngine Off
>>
>> AddHandler cgi-script .cgi .py
>> Options Includes Indexes SymLinksIfOwnerMatch ExecCGI
>>
>>
>> SecFilterEngine Off
>>
>>
>> SecRuleEngine Off
>>
>>
>>
>>
>>
>> Here's index.py:
>>
>> #!/usr/bin/python
>>
>> import string
>> import cgitb; cgitb.enable()
>> import cgi
>> import sys,os
>> sys.path.append(os.getcwd())
>> from template import template
>>
>> ourFile = string.split(__file__, "/")
>> page = ourFile[len(ourFile) - 1][:-3]
>>
>> form = cgi.FieldStorage()
>> w = form.getfirst('w', '1024')
>>
>> template(page, w)
>>
>>
>>
> Can you try running index.py from the command-line, and let me know if that
> works?
>
It runs fine. So I created a test file of the same, chmod and tried it on my
browser. Rendered. So I deleted index.py and recreated it from the command
line, chmod. Rendered! Apparently, somehow in the translation from uploading
it via ftp to moving the files to a new dir, something got screwed up in the
permissions that I can't see! Any idea what the heck that could possibly
be??
TIA,
V
--
http://mail.python.org/mailman/listinfo/python-list
Re: Re: String prefix question
Benjamin Kaplan wrote:
On Sun, Nov 8, 2009 at 9:38 PM, Alan Harris-Reid
wrote:
In the Python.org 3.1 documentation (section 20.4.6), there is a simple
"Hello World" WSGI application which includes the following method...
def hello_world_app(environ, start_response):
status ='200 OK' # HTTP Status
headers =(b'Content-type', b'text/plain; charset=utf-8')] # HTTP Headers
start_response(status, headers)
# The returned object is going to be printed
return [b"Hello World"]
Question - Can anyone tell me why the 'b' prefix is present before each
string? The method seems to work equally well with and without the prefix.
From what I can gather from the documentation the b prefix represents a
bytes literal, but can anyone explain (in simple english) what this means?
Many thanks,
Alan
The rather long version:
read http://www.joelonsoftware.com/articles/Unicode.html
A somewhat shorter summary, along with how Python deals with this:
Once upon a time, someone decided to allocate 1 byte for each
character. Since everything the Americans who made the computers
needed fit into 7 bits, this was alright. And they called this the
American Standard Code for Information Interchange (ASCII). When
computers came along, device manufacturers realized that they had 128
characters that didn't mean anything, so they all made their own
characters to show for the upper 128. And when they started selling
computers internationally, they used the upper 128 to store the
characters they needed for the local language. This had several
problems.
1) Files made by on one computer in one country wouldn't display right
in a computer made by a different manufacturer or for a different
country
2) The 256 characters were enough for most Western languages, but
Chinese and Japanese need a whole lot more.
To solve this problem, Unicode was created. Rather than thinking of
each character as a distinct set of bits, it just assigns a number to
each one (a code point). The bottom 128 characters are the original
ASCII set, and everything else you could think of was added on top of
that - other alphabets, mathematical symbols, music notes, cuneiform,
dominos, mah jong tiles, and more. Unicode is harder to implement than
a simple byte array, but it means strings are universal- every program
will interpret them exactly the same. Unicode strings in python are
the default ('') in Python 3.x and created in 2.x by putting a u in
front of the string declaration (u'')
Unicode, however, is a concept, and concepts can't be mapped to bits
that can be sent through the network or stored on the hard drive. So
instead we deal with strings internally as Unicode and then give them
an encoding when we send them back out. Some encodings, such as UTF-8,
can have multiple bytes per character and, as such, can deal with the
full range of Unicode characters. Other times, programs still expect
the old 8-bit encodings like ISO-8859-1 or the Windows Ansi code
pages. In Python, to declare that the string is a literal set of bytes
and the program should not try and interpret it, you use b'' in Python
3.x, or just declare it normally in Python 2.x ('').
--
What happens in your program:
When you print a Unicode string, Python has to decide what encoding to
use. If you're printing to a terminal, Python looks for the terminal's
encoding and uses that. In the event that it doesn't know what
encoding to use, Python defaults to ASCII because that's compatible
with almost everything. Since the string you're sending to the web
page only contains ASCII characters, the automatic conversion works
fine if you don't specify the b''. Since the resulting page uses UTF-8
(which you declare in the header), which is compatible with ASCII, the
output looks fine. If you try sending a string that has non-ASCII
characters, the program might throw a UnicodeEncodeError because it
doesn't know what bytes to use for those characters. It may be able to
guess, but since I haven't used WSGI directly before, I can't say for
sure.
Thanks Benjamin - great 'history' lesson - explains it well.
Regards,
Alan
--
http://mail.python.org/mailman/listinfo/python-list
questions regarding stack size use for multi-threaded python programs
Hi, background: we are using python 2.4.3 on CentOS 5.3 with many threads - and our shell's default stack size limit is set to 10240KB (i.e. ~10MB). we noticed that python's Threading module appears to create threads with this value as their stack size (we ran a sample program that creates 10 threads and measured its virtual memory size, then reduced the stack size limit of the shell to 5120KB - and saw that the program's virtual memory size was reduced by ~50MBs). the problem: our program uses numerous threads, and thus the virtual memory size gets to be very large. we would like to reduce the size of the stack to reduce this size. we were looking for information about recommendation for the stack size to use, but found none. questions: 1. is there some rule-of-thumb for the recommended stack size for python programs of various sorts? 2. is there a way for us, at runtime (from inside the code or outside the process), to find how much of a thread's stack we are using (in KB or some other size units)? 3. when we define local objects - do the objects themselves get allocated on the stack - or are they allocated on the heap and only references to them are kept on the stack? 4. would the size of the stacks (which are probably not really allocated by the linux virtual memory sub-system, unless used) have a noticeable performance effect on a python program? same question regarding the use of a large number of threads? thanks, Eyal -- http://mail.python.org/mailman/listinfo/python-list
Re: Serious Privileges Problem: Please Help
On Mon, 09 Nov 2009 10:36:31 -0800, Victor Subervi
wrote:
Of course. Let me start with some updates to httpd.conf, which didn't
help
anyway:
ServerAdmin m...@creative.vi
DocumentRoot /var/www/html/angrynates.com
ServerName angrynates.com
Options +ExecCGI -IncludesNoExec
Options +ExecCGI
AllowOverride All
AllowOverride FileInfo
#AddHandler mod_python .py
#PythonHandler mod_python.publisher
#PythonDebug On
AddHandler cgi-script .cgi .py
Options Includes Indexes SymLinksIfOwnerMatch ExecCGI
SecFilterEngine Off
SecRuleEngine Off
AddHandler cgi-script .cgi .py
Options Includes Indexes SymLinksIfOwnerMatch ExecCGI
SecFilterEngine Off
SecRuleEngine Off
Here's index.py:
#!/usr/bin/python
import string
import cgitb; cgitb.enable()
import cgi
import sys,os
sys.path.append(os.getcwd())
from template import template
ourFile = string.split(__file__, "/")
page = ourFile[len(ourFile) - 1][:-3]
form = cgi.FieldStorage()
w = form.getfirst('w', '1024')
template(page, w)
Can you try running index.py from the command-line, and let me know if
that works?
Also, as you've already been asked - please start your replies *below* the
text you are replying to. Putting your replies above the last email, or
"top-posting" makes reading long email threads with lots of text
distracting and frustrating.
--
Rami Chowdhury
"Never attribute to malice that which can be attributed to stupidity" --
Hanlon's Razor
408-597-7068 (US) / 07875-841-046 (UK) / 0189-245544 (BD)
--
http://mail.python.org/mailman/listinfo/python-list
Re: Req. comments on "first version" ch 2 progr. intro (using Python 3.x in Windows)
On Nov 9, 5:22 pm, "Alf P. Steinbach" wrote: > * Jon Clements: > > > > > On Nov 9, 4:10 pm, "Alf P. Steinbach" wrote: > >> Chapter 2 "Basic Concepts" is about 0.666 completed and 30 pages so far. > > >> It's now Python 3.x, and reworked with lots of graphical examples and more > >> explanatory text, plus limited in scope to Basic Concepts (which I > >> previously > >> just had as a first ch 2 section -- but there's rather a lot of > >> concepts!). > > >> I think it's wise to invite comments even when it's not 100% completed. > >> First, > >> because as opposed to ch 1 there is quite a bit of code here, and since > >> I'm a > >> Python newbie I may be using non-idiomatic constructs, not to mention doing > >> worse things. :-) Second, because comments in general can improve the text. > > >> Contents: > > >> 2.1 Super-basic concept: why programming is not DWIM. 1 > >> 2.2 Reported errors. 4 > >> 2.2.1 Case-sensitity. 4 > >> 2.2.2 Syntax / compilation errors. 4 > >> 2.2.3 Runtime errors / crashes. 5 > >> 2.3 A programming exploration tool: turtle graphics. 6 > >> 2.4 Naming things. 8 > >> 2.4.1 Naming actions: routines. 8 > >> 2.4.2 Naming data part I: variables. 11 > >> 2.4.3 Naming data part II: routine arguments. 13 > >> 2.5 Controlling the flow of execution. 14 > >> 2.5.1 Repeating actions automatically: loops. 14 > >> 2.5.2 Basic comparisions & boolean values. 16 > >> 2.5.3 Interlude I: a function graph program / about types. 17 > >> 2.5.4 Automated action choices. 21 > >> 2.5.5 Value-producing (function-like) routines. 23 > >> 2.5.6 Interlude II: a graph with zeroes marked / about program > >> structure. 26 > >> 2.5.7 Dynamically nested actions: recursive routines. 28 > >> 2.6 Objects. [Not started on this] 31 > >> 2.7 Collections. [Not started on this] 31 > > >> In Google Docs (both chapters available here): > > >> http://preview.tinyurl.com/ProgrammingBookP3> > >> Formats: PDF > > >> Cheers, > > >> - Alf > > > Well, you may not like it, but it is perfectly acceptable and indeed > > promoted to use CONSTANT_VAR_NAMES. You're almost discouraging the use > > of a well understood and oft-used idiom. I they're a lot of them, you > > generally have a settings module, that just lists all of the > > 'constants' (.h files effectively). > > Yeah, I thought of that angle so I emphasized 'programs'. > > As it happens about half or more of the variables in the examples are > constants. > > All uppercase convention for that would be ugly to me. :-) Okies, maybe introducing the fact that lots of 'programs' often have constants, which are quite often settings or whatever and they would use the uppercase notation (and if numerous, in a separate module). Also maybe you can introduce the fundamental idea of a 'namespace', maybe something like: class const: pi = 3.14 name = 'Alf' language = 'Python' or whatever, then reference const. ? I'm not 100% sure I'm keen on this idea, but it's an option you can consider at least. Introduces a couple of bits that may be discussed later, but I'd be a little scared that people would start thinking 'const.' was something magical. > > > "Technically line_length is a variable"...: No - it's a name that > > binds to an object that happens to be an integer. You've participated > > in discussions re: this. Similarly 'number_of_apples = > > number_of_apples + 1' is not an assignment ;) > > Ah, you're kidding. > > Probably. > > Anyways, that's the terminology employed by the language reference, and even > if > it wasn't I'd use it because this is primarily introduction to programming in > general, where Python just happens to be the vehicle; thus, language > independent > terminology preferred (e.g., I use "routine" instead of C/Python "function"). > > > It's nit-picky and I > > realise you're trying to keep it simple, but as it's meant for new > > programmers to the Python language, then introduce them to Python's > > way of "variables", they'll thank you for it later... (or run > > screaming, or start another thread here...) > > Yeah, good point, thanks! > > But it will have to wait till I get down into details... ;-) > Fair enough. It would be nice though to cover stuff like: a = [1,2,3] b = a - b is not a *copy* of a - b is not a *reference* to a - b just happens to be another name for the list object. And stuff about mutable/immutable: it would certainly help with a lot of gotcha's. > > I've never seen/heard != described as "different from"; what's wrong > > with "not equal to"? > > Thanks! > > > And why no mention of 'not' (should be mentioned > > with booleans surely?). > > Again, I'll discuss that later. It's just too much to bring up. Most of my > work > with this has been to pare down to essentials and *remove* stuff I'd written. > Well, should you re-write != as "not equal to", it wouldn't hurt to mention a little later that not False is True and vice versa... > > That's as
Re: Choosing GUI Module for Python
On Nov 9, 3:59 am, Antony wrote: > I would like to know about that pros and cons only ... I'll reiterate what i have said and others have said. WE NEED MORE INFO TO PROPERLY GUIDE YOU!!! Survey: What GUI is right for you? 1. What is your level of GUI programming? (0 1 2 3 4 5) 2. Will you be using this GUI for your own apps or distributing the apps? 3. What is the primary OS that this app will be used on (or any)? 4. What type of app (graphics(2D/3D), texteditor, hello world)? 5. Are themes/customizable look and feel important? *. You mentioned IDE's. That of course will narrow your choice pool substantially. Tkinter: +Is included in Python as a built-in module! +very easy to learn! +adequate docs! -lacks professional appearance -lacks many important widgets http://infohost.nmt.edu/tcc/help/pubs/tkinter/ http://effbot.org/tkinterbook/ wxPython: +larger richer widget set than tk! +better look and feel than tk! +opengl canvas built-in! -not as easy to learn as tk -docs are lacking at best (i really wish this were better!) -not built-in to Python (rightly so, too big!) i won't comment on the others. If you have absolutely no experience try out Tkinter just to a feel for GUI in a hand holding environment. If you are not happy with Tkinter's simplicity then move on to a full featured GUI kit if you need the more advanced stuff. I would say try them all! I would also suggest you learn to code GUI's without an IDE. I think the experience is more rewarding. You should know every bit of code you create personally! -- http://mail.python.org/mailman/listinfo/python-list
Re: Serious Privileges Problem: Please Help
Of course. Let me start with some updates to httpd.conf, which didn't help
anyway:
ServerAdmin m...@creative.vi
DocumentRoot /var/www/html/angrynates.com
ServerName angrynates.com
Options +ExecCGI -IncludesNoExec
Options +ExecCGI
AllowOverride All
AllowOverride FileInfo
#AddHandler mod_python .py
#PythonHandler mod_python.publisher
#PythonDebug On
AddHandler cgi-script .cgi .py
Options Includes Indexes SymLinksIfOwnerMatch ExecCGI
SecFilterEngine Off
SecRuleEngine Off
AddHandler cgi-script .cgi .py
Options Includes Indexes SymLinksIfOwnerMatch ExecCGI
SecFilterEngine Off
SecRuleEngine Off
Here's index.py:
#!/usr/bin/python
import string
import cgitb; cgitb.enable()
import cgi
import sys,os
sys.path.append(os.getcwd())
from template import template
ourFile = string.split(__file__, "/")
page = ourFile[len(ourFile) - 1][:-3]
form = cgi.FieldStorage()
w = form.getfirst('w', '1024')
template(page, w)
Here's template.py:
#!/usr/bin/python
import cgitb; cgitb.enable()
import cgi
import sys,os
sys.path.append(os.getcwd())
p = 'template'
def template(page, w):
wn = int(w)/1024
print "Content-Type: text/html"
print
print '''
http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd";>
http://www.w3.org/1999/xhtml";>
.text { font-family: Arial, Helvetica, sans-serif; font-size: 16px;
text-decoration: none; text-align: justify}
Global Solutions Group
'''
print "
'''
TIA,
V
On Mon, Nov 9, 2009 at 1:14 PM, Rami Chowdhury wrote:
> On Mon, 09 Nov 2009 09:44:24 -0800, Victor Subervi <
> victorsube...@gmail.com> wrote:
>
> Did you give up on me?
>> V
>>
>> On Sun, Nov 8, 2009 at 12:40 PM, Victor Subervi > >wrote:
>>
>> [r...@13gems angrynates.com]# chcon -R -h
>>> unconfined_u:object_r:httpd_sys_content_t global_solutions/*
>>>
>>> Then I surfed to
>>> http://209.216.9.56/global_solutions/index.py
>>>
>>> [r...@13gems angrynates.com]# tail /var/log/messages
>>> Nov 8 04:26:02 13gems syslogd 1.4.1: restart.
>>> [r...@13gems angrynates.com]# tail /var/log/httpd/error_log
>>> [Sun Nov 08 05:35:10 2009] [notice] Digest: generating secret for digest
>>> authentication ...
>>> [Sun Nov 08 05:35:10 2009] [notice] Digest: done
>>> [Sun Nov 08 05:35:10 2009] [notice] mod_python: Creating 4 session
>>> mutexes
>>> based on 10 max processes and 0 max threads.
>>> [Sun Nov 08 05:35:10 2009] [notice] Apache/2.2.3 (CentOS) configured --
>>> resuming normal operations
>>> [Sun Nov 08 07:29:40 2009] [error] [client 66.248.168.98] File does not
>>> exist: /var/www/html/angrynates.com/favicon.ico
>>> [Sun Nov 08 07:29:40 2009] [error] [client 66.248.168.98] (2)No such file
>>> or directory: exec of '/var/www/html/
>>> angrynates.com/global_solutions/index.py' failed, referer:
>>> http://209.216.9.56/global_solutions/
>>> [Sun Nov 08 07:29:40 2009] [error] [client 66.248.168.98] Premature end
>>> of
>>> script headers: index.py, referer: http://209.216.9.56/global_solutions/
>>> [Sun Nov 08 09:38:44 2009] [error] [client 66.248.168.98] File does not
>>> exist: /var/www/html/angrynates.com/favicon.ico
>>> [Sun Nov 08 09:38:44 2009] [error] [client 66.248.168.98] (2)No such file
>>> or directory: exec of '/var/www/html/
>>> angrynates.com/global_solutions/index.py' failed, referer:
>>> http://209.216.9.56/global_solutions/
>>> [Sun Nov 08 09:38:44 2009] [error] [client 66.248.168.98] Premature end
>>> of
>>> script headers: index.py, referer: http://209.216.9.56/global_solutions/
>>>
>>> TIA,
>>> V
>>>
>>> On Sun, Nov 8, 2009 at 12:28 PM, Rami Chowdhury <
>>> rami.chowdh...@gmail.com>wrote:
>>>
>>> On Sunday 08 November 2009 05:44:31 Victor Subervi wrote:
> [r...@13gems angrynates.com]# chcon -u unconfined_u -r object_r -t
> httpd_sys_content_t global_solutions
> chcon: can't apply partial context to unlabeled file global_solutions
> Please advise.
Try 'chcon -R -h unconfined_u:object_r:httpd_sys_content_t
global_solutions/*', which should specif
Re: Tax Calculator--Tkinter
Someone Something wrote: > > from Tkinter import *; Try to avoid this. Better import Tkinter. And don't forget to import Tkconstants too! > > rate=Frame(root) > > income=Frame(root) > > result=Frame(root) Why do you use three frames? You only need one. And you can make your class TaxCalc inherit from Tkinter.Frame ... > > The thing is, that even if I put "12" in the result text field, get > > returns an empty string. How can I fix this? I haven't found the reason for that, but this should work. I also added MRABs version of printResult(). import Tkinter, Tkconstants class TaxCalc(Tkinter.Frame): def __init__(self, root): Tkinter.Frame.__init__(self, root) Tkinter.Button(self, text='Enter tax rate', command=self.getRate).pack() self.rate=Tkinter.Entry(self) self.rate.pack() Tkinter.Button(self, text='Enter income', command=self.getIncome).pack() self.income=Tkinter.Entry(self) self.income.pack() Tkinter.Button(self, text='Get result', command=self.printResult).pack() self.result=Tkinter.Entry(self) self.result.pack() self.pack() def getRate(self): print "srate: ", self.rate.get() def getIncome(self): print "sincome: ", self.income.get() def printResult(self): try: rate = float(self.rate.get()) income = float(self.income.get()) result = ((100.0 - rate) / 100.0) * income self.result.insert(Tkconstants.END, str(result)) except ValueError: print "Clear everything and start again." print "Don't fool around with me." root=Tkinter.Tk() MyCalc=TaxCalc(root) root.mainloop() -- http://mail.python.org/mailman/listinfo/python-list
Re: Serious Privileges Problem: Please Help
On Mon, 09 Nov 2009 09:44:24 -0800, Victor Subervi wrote: Did you give up on me? V On Sun, Nov 8, 2009 at 12:40 PM, Victor Subervi wrote: [r...@13gems angrynates.com]# chcon -R -h unconfined_u:object_r:httpd_sys_content_t global_solutions/* Then I surfed to http://209.216.9.56/global_solutions/index.py [r...@13gems angrynates.com]# tail /var/log/messages Nov 8 04:26:02 13gems syslogd 1.4.1: restart. [r...@13gems angrynates.com]# tail /var/log/httpd/error_log [Sun Nov 08 05:35:10 2009] [notice] Digest: generating secret for digest authentication ... [Sun Nov 08 05:35:10 2009] [notice] Digest: done [Sun Nov 08 05:35:10 2009] [notice] mod_python: Creating 4 session mutexes based on 10 max processes and 0 max threads. [Sun Nov 08 05:35:10 2009] [notice] Apache/2.2.3 (CentOS) configured -- resuming normal operations [Sun Nov 08 07:29:40 2009] [error] [client 66.248.168.98] File does not exist: /var/www/html/angrynates.com/favicon.ico [Sun Nov 08 07:29:40 2009] [error] [client 66.248.168.98] (2)No such file or directory: exec of '/var/www/html/ angrynates.com/global_solutions/index.py' failed, referer: http://209.216.9.56/global_solutions/ [Sun Nov 08 07:29:40 2009] [error] [client 66.248.168.98] Premature end of script headers: index.py, referer: http://209.216.9.56/global_solutions/ [Sun Nov 08 09:38:44 2009] [error] [client 66.248.168.98] File does not exist: /var/www/html/angrynates.com/favicon.ico [Sun Nov 08 09:38:44 2009] [error] [client 66.248.168.98] (2)No such file or directory: exec of '/var/www/html/ angrynates.com/global_solutions/index.py' failed, referer: http://209.216.9.56/global_solutions/ [Sun Nov 08 09:38:44 2009] [error] [client 66.248.168.98] Premature end of script headers: index.py, referer: http://209.216.9.56/global_solutions/ TIA, V On Sun, Nov 8, 2009 at 12:28 PM, Rami Chowdhury wrote: On Sunday 08 November 2009 05:44:31 Victor Subervi wrote: > [r...@13gems angrynates.com]# chcon -u unconfined_u -r object_r -t > httpd_sys_content_t global_solutions > chcon: can't apply partial context to unlabeled file global_solutions > Please advise. Try 'chcon -R -h unconfined_u:object_r:httpd_sys_content_t global_solutions/*', which should specify the whole context at once and avoid that error, as well as apply it recursively to all files and subdirectories. Also, to narrow down the error, can you let us have the output of: tail /var/log/messages tail /var/log/httpd/error_log OK, after all this I've forgotten what your .py file looked like -- can you post that please? -- Rami Chowdhury "Never attribute to malice that which can be attributed to stupidity" -- Hanlon's Razor 408-597-7068 (US) / 07875-841-046 (UK) / 0189-245544 (BD) -- http://mail.python.org/mailman/listinfo/python-list
Re: Serious Privileges Problem: Please Help
On Mon, Nov 9, 2009 at 12:44 PM, Victor Subervi wrote: > Did you give up on me? > V > Please don't top-post. -- http://mail.python.org/mailman/listinfo/python-list
Re: Req. comments on "first version" ch 2 progr. intro (using Python 3.x in Windows)
* sstein...@gmail.com: On Nov 9, 2009, at 11:54 AM, Jon Clements wrote: On Nov 9, 4:10 pm, "Alf P. Steinbach" wrote: First, because as opposed to ch 1 there is quite a bit of code here, and since I'm a Python newbie I may be using non-idiomatic constructs, Welp, there goes my last excuse. I'm off to write my book: Heart Surgery at Home *** How to Save Thousands and Get Results Just Like in Hospital Chapter 1: Sanitation, Schmanitation: How Clean is Clean Enough? Chapter 2: Surgical Tools vs. Ginsu: How Sharp is Sharp Enough? Chapter 3: Gray's Anatomy and Sharpies: Laying out The Surgery Chapter 4: Before You Start: Charging Your Cell Phone, and Testing 911 Chapter 5: Anesthesia: Jack Daniels or Smirnoffs; How Much is Enough? Chapter 6: The Insanity Defense: Laying the Groundwork with 6 Month Plan That's as far as I've gotten... Amazon best seller list, here I come! S It helps if you have some experience with surgery on other parts of the body. Cheers & hth., - Alf -- http://mail.python.org/mailman/listinfo/python-list
Re: Serious Privileges Problem: Please Help
Did you give up on me? V On Sun, Nov 8, 2009 at 12:40 PM, Victor Subervi wrote: > [r...@13gems angrynates.com]# chcon -R -h > unconfined_u:object_r:httpd_sys_content_t global_solutions/* > > Then I surfed to > http://209.216.9.56/global_solutions/index.py > > [r...@13gems angrynates.com]# tail /var/log/messages > Nov 8 04:26:02 13gems syslogd 1.4.1: restart. > [r...@13gems angrynates.com]# tail /var/log/httpd/error_log > [Sun Nov 08 05:35:10 2009] [notice] Digest: generating secret for digest > authentication ... > [Sun Nov 08 05:35:10 2009] [notice] Digest: done > [Sun Nov 08 05:35:10 2009] [notice] mod_python: Creating 4 session mutexes > based on 10 max processes and 0 max threads. > [Sun Nov 08 05:35:10 2009] [notice] Apache/2.2.3 (CentOS) configured -- > resuming normal operations > [Sun Nov 08 07:29:40 2009] [error] [client 66.248.168.98] File does not > exist: /var/www/html/angrynates.com/favicon.ico > [Sun Nov 08 07:29:40 2009] [error] [client 66.248.168.98] (2)No such file > or directory: exec of '/var/www/html/ > angrynates.com/global_solutions/index.py' failed, referer: > http://209.216.9.56/global_solutions/ > [Sun Nov 08 07:29:40 2009] [error] [client 66.248.168.98] Premature end of > script headers: index.py, referer: http://209.216.9.56/global_solutions/ > [Sun Nov 08 09:38:44 2009] [error] [client 66.248.168.98] File does not > exist: /var/www/html/angrynates.com/favicon.ico > [Sun Nov 08 09:38:44 2009] [error] [client 66.248.168.98] (2)No such file > or directory: exec of '/var/www/html/ > angrynates.com/global_solutions/index.py' failed, referer: > http://209.216.9.56/global_solutions/ > [Sun Nov 08 09:38:44 2009] [error] [client 66.248.168.98] Premature end of > script headers: index.py, referer: http://209.216.9.56/global_solutions/ > > TIA, > V > > On Sun, Nov 8, 2009 at 12:28 PM, Rami Chowdhury > wrote: > >> On Sunday 08 November 2009 05:44:31 Victor Subervi wrote: >> > [r...@13gems angrynates.com]# chcon -u unconfined_u -r object_r -t >> > httpd_sys_content_t global_solutions >> > chcon: can't apply partial context to unlabeled file global_solutions >> > Please advise. >> >> Try 'chcon -R -h unconfined_u:object_r:httpd_sys_content_t >> global_solutions/*', which should specify the whole context at once and >> avoid >> that error, as well as apply it recursively to all files and >> subdirectories. >> >> Also, to narrow down the error, can you let us have the output of: >>tail /var/log/messages >> tail /var/log/httpd/error_log >> >> HTH, >> Rami >> >> >> Rami Chowdhury >> "As an online discussion grows longer, the probability of a comparison >> involving Nazis or Hitler approaches one." -- Godwin's Law >> 408-597-7068 (US) / 07875-841-046 (UK) / 0189-245544 (BD) >> > > -- http://mail.python.org/mailman/listinfo/python-list
Re: Re: String prefix question
Gerard Flanagan wrote: Alan Harris-Reid wrote: In the Python.org 3.1 documentation (section 20.4.6), there is a simple “Hello World” WSGI application which includes the following method... def hello_world_app(environ, start_response): status ='200 OK' # HTTP Status headers =(b'Content-type', b'text/plain; charset=utf-8')] # HTTP Headers start_response(status, headers) # The returned object is going to be printed return [b"Hello World"] Question - Can anyone tell me why the 'b' prefix is present before each string? The method seems to work equally well with and without the prefix. From what I can gather from the documentation the b prefix represents a bytes literal, but can anyone explain (in simple english) what this means? Many thanks, Alan Another link: http://www.stereoplex.com/two-voices/python-unicode-and-unicodedecodeerror Gerard - thanks for the link - explains it well. Many thanks, Alan -- http://mail.python.org/mailman/listinfo/python-list
Re: Req. comments on "first version" ch 2 progr. intro (using Python 3.x in Windows)
On Nov 9, 2009, at 11:54 AM, Jon Clements wrote: On Nov 9, 4:10 pm, "Alf P. Steinbach" wrote: First, because as opposed to ch 1 there is quite a bit of code here, and since I'm a Python newbie I may be using non-idiomatic constructs, Welp, there goes my last excuse. I'm off to write my book: Heart Surgery at Home *** How to Save Thousands and Get Results Just Like in Hospital Chapter 1: Sanitation, Schmanitation: How Clean is Clean Enough? Chapter 2: Surgical Tools vs. Ginsu: How Sharp is Sharp Enough? Chapter 3: Gray's Anatomy and Sharpies: Laying out The Surgery Chapter 4: Before You Start: Charging Your Cell Phone, and Testing 911 Chapter 5: Anesthesia: Jack Daniels or Smirnoffs; How Much is Enough? Chapter 6: The Insanity Defense: Laying the Groundwork with 6 Month Plan That's as far as I've gotten... Amazon best seller list, here I come! S -- http://mail.python.org/mailman/listinfo/python-list
Re: Req. comments on "first version" ch 2 progr. intro (using Python 3.x in Windows)
* Jon Clements: On Nov 9, 4:10 pm, "Alf P. Steinbach" wrote: Chapter 2 "Basic Concepts" is about 0.666 completed and 30 pages so far. It's now Python 3.x, and reworked with lots of graphical examples and more explanatory text, plus limited in scope to Basic Concepts (which I previously just had as a first ch 2 section -- but there's rather a lot of concepts!). I think it's wise to invite comments even when it's not 100% completed. First, because as opposed to ch 1 there is quite a bit of code here, and since I'm a Python newbie I may be using non-idiomatic constructs, not to mention doing worse things. :-) Second, because comments in general can improve the text. Contents: 2.1 Super-basic concept: why programming is not DWIM. 1 2.2 Reported errors.4 2.2.1 Case-sensitity. 4 2.2.2 Syntax / compilation errors.4 2.2.3 Runtime errors / crashes. 5 2.3 A programming exploration tool: turtle graphics.6 2.4 Naming things. 8 2.4.1 Naming actions: routines. 8 2.4.2 Naming data part I: variables. 11 2.4.3 Naming data part II: routine arguments. 13 2.5 Controlling the flow of execution. 14 2.5.1 Repeating actions automatically: loops. 14 2.5.2 Basic comparisions & boolean values.16 2.5.3 Interlude I: a function graph program / about types.17 2.5.4 Automated action choices. 21 2.5.5 Value-producing (function-like) routines. 23 2.5.6 Interlude II: a graph with zeroes marked / about program structure. 26 2.5.7 Dynamically nested actions: recursive routines. 28 2.6 Objects. [Not started on this] 31 2.7 Collections.[Not started on this] 31 In Google Docs (both chapters available here): http://preview.tinyurl.com/ProgrammingBookP3> Formats: PDF Cheers, - Alf Well, you may not like it, but it is perfectly acceptable and indeed promoted to use CONSTANT_VAR_NAMES. You're almost discouraging the use of a well understood and oft-used idiom. I they're a lot of them, you generally have a settings module, that just lists all of the 'constants' (.h files effectively). Yeah, I thought of that angle so I emphasized 'programs'. As it happens about half or more of the variables in the examples are constants. All uppercase convention for that would be ugly to me. :-) "Technically line_length is a variable"...: No - it's a name that binds to an object that happens to be an integer. You've participated in discussions re: this. Similarly 'number_of_apples = number_of_apples + 1' is not an assignment ;) Ah, you're kidding. Probably. Anyways, that's the terminology employed by the language reference, and even if it wasn't I'd use it because this is primarily introduction to programming in general, where Python just happens to be the vehicle; thus, language independent terminology preferred (e.g., I use "routine" instead of C/Python "function"). It's nit-picky and I realise you're trying to keep it simple, but as it's meant for new programmers to the Python language, then introduce them to Python's way of "variables", they'll thank you for it later... (or run screaming, or start another thread here...) Yeah, good point, thanks! But it will have to wait till I get down into details... ;-) I've never seen/heard != described as "different from"; what's wrong with "not equal to"? Thanks! And why no mention of 'not' (should be mentioned with booleans surely?). Again, I'll discuss that later. It's just too much to bring up. Most of my work with this has been to pare down to essentials and *remove* stuff I'd written. That's as far as I've got; might get around to reading more later... Cool tree at the end :) Thanks! Cheers, - Alf -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: regular expression matching multiple occurrences of one group
pinkisntwell wrote: >How can I make a regular expression that will match every occurrence >of a group and return each occurrence as a group match? For example, >for a string "-c-c-c-c-c", how can I make a regex which will return a >group match for each occurrence of "-c"? Where is the problem? The most straight-forward, simplest approach works just fine: use strict; use warnings; my $s = '-c-c-c-c-c'; my @matched = $s=~/-c/g; print "Found ". @matched . " occurences of '-c':\n"; print join "\n", @matched; Or did you forget to use the g modifier? jue -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: regular expression matching multiple occurrences of one group
On Mon, 9 Nov 2009 05:53:00 -0800 (PST), pinkisntwell
wrote:
>How can I make a regular expression that will match every occurrence
>of a group and return each occurrence as a group match? For example,
>for a string "-c-c-c-c-c", how can I make a regex which will return a
>group match for each occurrence of "-c"?
Is this a ludicrous question, or is it meant for the python group?
use strict;
use warnings;
my @matches = "-c-c-c-c-c" =~ /(-c)/g;
print "\...@matches\n";
@matches = ();
"-c-a-c-c-c" =~ /(?:(-c)(?{push @matches, $^N})|.)+/x;
print "@matches\n";
-sln
--
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Re: Req. comments on "first version" ch 2 progr. intro (using Python 3.x in Windows)
On Nov 9, 4:10 pm, "Alf P. Steinbach" wrote: > Chapter 2 "Basic Concepts" is about 0.666 completed and 30 pages so far. > > It's now Python 3.x, and reworked with lots of graphical examples and more > explanatory text, plus limited in scope to Basic Concepts (which I previously > just had as a first ch 2 section -- but there's rather a lot of concepts!). > > I think it's wise to invite comments even when it's not 100% completed. First, > because as opposed to ch 1 there is quite a bit of code here, and since I'm a > Python newbie I may be using non-idiomatic constructs, not to mention doing > worse things. :-) Second, because comments in general can improve the text. > > Contents: > > 2.1 Super-basic concept: why programming is not DWIM. 1 > 2.2 Reported errors. 4 > 2.2.1 Case-sensitity. 4 > 2.2.2 Syntax / compilation errors. 4 > 2.2.3 Runtime errors / crashes. 5 > 2.3 A programming exploration tool: turtle graphics. 6 > 2.4 Naming things. 8 > 2.4.1 Naming actions: routines. 8 > 2.4.2 Naming data part I: variables. 11 > 2.4.3 Naming data part II: routine arguments. 13 > 2.5 Controlling the flow of execution. 14 > 2.5.1 Repeating actions automatically: loops. 14 > 2.5.2 Basic comparisions & boolean values. 16 > 2.5.3 Interlude I: a function graph program / about types. 17 > 2.5.4 Automated action choices. 21 > 2.5.5 Value-producing (function-like) routines. 23 > 2.5.6 Interlude II: a graph with zeroes marked / about program structure. 26 > 2.5.7 Dynamically nested actions: recursive routines. 28 > 2.6 Objects. [Not started on this] 31 > 2.7 Collections. [Not started on this] 31 > > In Google Docs (both chapters available here): > > http://preview.tinyurl.com/ProgrammingBookP3> > Formats: PDF > > Cheers, > > - Alf Well, you may not like it, but it is perfectly acceptable and indeed promoted to use CONSTANT_VAR_NAMES. You're almost discouraging the use of a well understood and oft-used idiom. I they're a lot of them, you generally have a settings module, that just lists all of the 'constants' (.h files effectively). "Technically line_length is a variable"...: No - it's a name that binds to an object that happens to be an integer. You've participated in discussions re: this. Similarly 'number_of_apples = number_of_apples + 1' is not an assignment ;) It's nit-picky and I realise you're trying to keep it simple, but as it's meant for new programmers to the Python language, then introduce them to Python's way of "variables", they'll thank you for it later... (or run screaming, or start another thread here...) I've never seen/heard != described as "different from"; what's wrong with "not equal to"? And why no mention of 'not' (should be mentioned with booleans surely?). That's as far as I've got; might get around to reading more later... Cool tree at the end :) Cheers, Jon -- http://mail.python.org/mailman/listinfo/python-list
Re: String prefix question
Alan Harris-Reid wrote: In the Python.org 3.1 documentation (section 20.4.6), there is a simple “Hello World” WSGI application which includes the following method... def hello_world_app(environ, start_response): status = b'200 OK' # HTTP Status headers = [(b'Content-type', b'text/plain; charset=utf-8')] # HTTP Headers start_response(status, headers) # The returned object is going to be printed return [b"Hello World"] Question - Can anyone tell me why the 'b' prefix is present before each string? The method seems to work equally well with and without the prefix. From what I can gather from the documentation the b prefix represents a bytes literal, but can anyone explain (in simple english) what this means? Many thanks, Alan Another link: http://www.stereoplex.com/two-voices/python-unicode-and-unicodedecodeerror -- http://mail.python.org/mailman/listinfo/python-list
Re: [PYTHON] How to set the range for x-axis
Hi Chris, The code is from scipy import * from pylab import * x = [0.5,0.6,0.7,0.8,0.9,1.0] y = [2,6,8,10,10,10] plot(x,y,linewidth=5.0) show() and not from scipy import * from pylab import * x1 = [0.5,0.6,0.7,0.8,0.9,1.0] x2 = [0,1,2,3,4,5,6,7,8,9,10] plot(x1,y01,linewidth=5.0) show() Moses On Mon, Nov 9, 2009 at 6:43 PM, Moses wrote: > > Hi Chris, > > I am using python 2.6 and am using scipy and pylab. See the code below. > Cheers. > > from scipy import * > from pylab import * > > x1 = [0.5,0.6,0.7,0.8,0.9,1.0] > x2 = [0,1,2,3,4,5,6,7,8,9,10] > > plot(x1,y01,linewidth=5.0) > show() > > Thanks. > . > > > > On Mon, Nov 9, 2009 at 5:49 PM, Chris Rebert wrote: > >> On Mon, Nov 9, 2009 at 7:45 AM, Moses wrote: >> > I have written a script in python to plot a graph. However, the >> > range for the x-axis starts from 0.5 to 1.0. However, I would like >> > to start from 0 to 1. Any pointer to this shall be appreciated. >> >> Some /very/ basic information such as what plotting library you're >> using would be necessary to answer your question. What version of >> Python you're using would also be useful. >> >> Cheers, >> Chris >> -- >> http://blog.rebertia.com >> > > -- http://mail.python.org/mailman/listinfo/python-list
Re: [PYTHON] How to set the range for x-axis
Hi Chris, I am using python 2.6 and am using scipy and pylab. See the code below. Cheers. from scipy import * from pylab import * x1 = [0.5,0.6,0.7,0.8,0.9,1.0] x2 = [0,1,2,3,4,5,6,7,8,9,10] plot(x1,y01,linewidth=5.0) show() Thanks. . On Mon, Nov 9, 2009 at 5:49 PM, Chris Rebert wrote: > On Mon, Nov 9, 2009 at 7:45 AM, Moses wrote: > > I have written a script in python to plot a graph. However, the > > range for the x-axis starts from 0.5 to 1.0. However, I would like > > to start from 0 to 1. Any pointer to this shall be appreciated. > > Some /very/ basic information such as what plotting library you're > using would be necessary to answer your question. What version of > Python you're using would also be useful. > > Cheers, > Chris > -- > http://blog.rebertia.com > -- http://mail.python.org/mailman/listinfo/python-list
Req. comments on "first version" ch 2 progr. intro (using Python 3.x in Windows)
Chapter 2 "Basic Concepts" is about 0.666 completed and 30 pages so far. It's now Python 3.x, and reworked with lots of graphical examples and more explanatory text, plus limited in scope to Basic Concepts (which I previously just had as a first ch 2 section -- but there's rather a lot of concepts!). I think it's wise to invite comments even when it's not 100% completed. First, because as opposed to ch 1 there is quite a bit of code here, and since I'm a Python newbie I may be using non-idiomatic constructs, not to mention doing worse things. :-) Second, because comments in general can improve the text. Contents: 2.1 Super-basic concept: why programming is not DWIM. 1 2.2 Reported errors.4 2.2.1 Case-sensitity. 4 2.2.2 Syntax / compilation errors.4 2.2.3 Runtime errors / crashes. 5 2.3 A programming exploration tool: turtle graphics.6 2.4 Naming things. 8 2.4.1 Naming actions: routines. 8 2.4.2 Naming data part I: variables. 11 2.4.3 Naming data part II: routine arguments. 13 2.5 Controlling the flow of execution. 14 2.5.1 Repeating actions automatically: loops. 14 2.5.2 Basic comparisions & boolean values.16 2.5.3 Interlude I: a function graph program / about types.17 2.5.4 Automated action choices. 21 2.5.5 Value-producing (function-like) routines. 23 2.5.6 Interlude II: a graph with zeroes marked / about program structure. 26 2.5.7 Dynamically nested actions: recursive routines. 28 2.6 Objects. [Not started on this] 31 2.7 Collections.[Not started on this] 31 In Google Docs (both chapters available here): http://preview.tinyurl.com/ProgrammingBookP3> Formats: PDF Cheers, - Alf -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: regular expression matching multiple occurrences of one group
On Nov 9, 1:53Â pm, pinkisntwell wrote:
> How can I make a regular expression that will match every occurrence
> of a group and return each occurrence as a group match? For example,
> for a string "-c-c-c-c-c", how can I make a regex which will return a
> group match for each occurrence of "-c"?
As well as what Diez has said, unless you absolutely want regexp's,
and by the sounds of it I'm guessing you may be after something more
flexible: what about the pyparsing module [1]. It handles your
situation quite nicely.
>>> import pyparsing
>>> parser = pyparsing.ZeroOrMore('-c')
>>> parser.parseString('-c-c-c-c-c-c')
(['-c', '-c', '-c', '-c', '-c', '-c'], {})
hth,
Jon.
[1] http://pyparsing.wikispaces.com/
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Re: CGI vs mod_python
Uuuuh. Thanks! V On Mon, Nov 9, 2009 at 10:45 AM, sstein...@gmail.com wrote: > On Nov 9, 2009, at 10:41 AM, Victor Subervi wrote: > > On Mon, Nov 9, 2009 at 10:29 AM, sstein...@gmail.com > wrote: > >> >> On Nov 9, 2009, at 10:18 AM, Victor Subervi wrote: >> >> Yes, obviously. But if CGI is enabled, it should work anyway, should it >>> not? >>> >> >> Depends on what "CGI is enabled" means. >> >> Usually, web servers are not set to just handle cgi scripts from anywhere, >> but only from specific file system locations. Otherwise, an an anonymous >> upload could be executed as CGI and wreak havoc. >> > > Of course, yes. > >> >> And "it should work anyway, should it not" is already answered by "they're >> having trouble getting my scripts to work." >> > > They're having _all_sorts_of_trouble_ getting my scripts to work, not just > this issue. These scripts worked fine on another server. I don't understand > what the problems are, and I'm trying to parameterize. > > > Gotcha. > > Do you have access to and have you given them the old httpd.conf? > > That could certainly give them some clues about what's different. > > Also, there is (on apache 2.x+ anyway) a whole directory tree full of > included files that get sucked in as the configuration is getting built so > that whole tree would give them everything they would need (if they know how > to work from it which they should if they're running a "server farm"). > > S > > -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: regular expression matching multiple occurrences of one group
pinkisntwell schrieb: How can I make a regular expression that will match every occurrence of a group and return each occurrence as a group match? For example, for a string "-c-c-c-c-c", how can I make a regex which will return a group match for each occurrence of "-c"? Why is this flagged "OT"? And in python, you can't do that. Groups are based upon the lexical structure of the regexp, and thus have a fixed number of groups. Either use repetitive searches over the input, or postprocess the combined group by e.g. splitting it. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: [PYTHON] How to set the range for x-axis
On Mon, Nov 9, 2009 at 7:45 AM, Moses wrote: > I have written a script in python to plot a graph. However, the > range for the x-axis starts from 0.5 to 1.0. However, I would like > to start from 0 to 1. Any pointer to this shall be appreciated. Some /very/ basic information such as what plotting library you're using would be necessary to answer your question. What version of Python you're using would also be useful. Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
[PYTHON] How to set the range for x-axis
Hi Everyone, I have written a script in python to plot a graph. However, the range for the x-axis starts from 0.5 to 1.0. However, I would like to start from 0 to 1. Any pointer to this shall be appreciated. Thanks, Moses -- http://mail.python.org/mailman/listinfo/python-list
Re: CGI vs mod_python
On Nov 9, 2009, at 10:18 AM, Victor Subervi wrote: Yes, obviously. But if CGI is enabled, it should work anyway, should it not? Depends on what "CGI is enabled" means. Usually, web servers are not set to just handle cgi scripts from anywhere, but only from specific file system locations. Otherwise, an an anonymous upload could be executed as CGI and wreak havoc. And "it should work anyway, should it not" is already answered by "they're having trouble getting my scripts to work." S -- http://mail.python.org/mailman/listinfo/python-list
Re: CGI vs mod_python
Yes, obviously. But if CGI is enabled, it should work anyway, should it not? V On Mon, Nov 9, 2009 at 9:46 AM, sstein...@gmail.com wrote: > > On Nov 9, 2009, at 9:32 AM, Victor Subervi wrote: > > Hi; >> I've been told by a server farm that they're having trouble getting my >> scripts to work because they're written with cgi calls as opposed to >> mod_python. Is there a basis for their complaint? These pages serve fine on >> another server. >> > > Does the server they're working fine on use CGI? Yes, they're different. > > S > > -- http://mail.python.org/mailman/listinfo/python-list
Re: Choosing GUI Module for Python
On 11/8/09 11:49 PM, Antony wrote: Hi all I just wanted to know which module is best for developing designing interface in python . i have come across some modules which are listed here . please tell your suggestions and comments to choose best one 1. PyGTK 2. PyQT 3. PySide 4. wxPython 5 . TKinter Also i need to know is there any IDE for developing these things . . . http://lmgtfy.com/?q=gui+toolkit+for+python -- Kevin Walzer Code by Kevin http://www.codebykevin.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Query about doing fortran-esque repeat formatting
Thanks to the chaps who answered, I knew there would be an efficient answer to this. regards, Rob On Mon, 2009-11-09 at 13:31 +0100, Jean-Michel Pichavant wrote: > Glenn Hutchings wrote: > > Rob Briggs mun.ca> writes: > > > > > > > Is there a way to do a repeat formatting command like in Fortran? Rather > > > that doing this: > > > > > > print "%s %-5.3f %-5.3f %-5.3f %-5.3f %-5.3f %-5.3f %-5.3f" % > > > (parmName[i], tmp[i][1], tmp[i][2], tmp[i][4], tmp[i][6], tmp[i][7], > > > tmp[i][8], tmp[i][9]) > > > > > > > There certainly is. You can use python's string concatenation > > and repeat operators: > > > > print "%s" + " %-5.3f" * 7 % > > > > Glenn > > > > > > data = tuple(parmName[i]) + tuple(tmp[i]) > print "%s" + " %-5.3f" * len(tmp[i]) % data > > That should do the trick. > > JM -- http://mail.python.org/mailman/listinfo/python-list
Re: CGI vs mod_python
On Nov 9, 2009, at 9:32 AM, Victor Subervi wrote: Hi; I've been told by a server farm that they're having trouble getting my scripts to work because they're written with cgi calls as opposed to mod_python. Is there a basis for their complaint? These pages serve fine on another server. Does the server they're working fine on use CGI? Yes, they're different. S -- http://mail.python.org/mailman/listinfo/python-list
CGI vs mod_python
Hi; I've been told by a server farm that they're having trouble getting my scripts to work because they're written with cgi calls as opposed to mod_python. Is there a basis for their complaint? These pages serve fine on another server. TIA, Victor -- http://mail.python.org/mailman/listinfo/python-list
Re: sort values from dictionary of dictionaries python 2.4
J Wolfe wrote:
> I would like to sort this dictionary by the values of the inner
> dictionary ‘ob’ key.
Python's built-in dictionary is unsorted by design.
> mydict =
> {’WILW1′: {’fx’: ‘8.1′, ‘obtime’: ‘2009-11-07 06:45:00′, ‘ob’: ‘6.9′},
> ‘GRRW1′: {’fx’: ‘12.8′, ‘obtime’: ‘2009-11-07 04:15:00′, ‘ob’: ‘6.7′},
> ‘NASW1′: {’fx’: ‘6.8′, ‘obtime’: ‘2009-11-07 06:30:00′, ‘ob’: ‘7.1′}
> }
>
> In this case, this would become:
>
> mysorteddic =
> {’NASW1′: {’fx’: ‘6.8′, ‘obtime’: ‘2009-11-07 06:30:00′, ‘ob’: ‘7.1′},
> ‘WILW1′: {’fx’: ‘8.1′, ‘obtime’: ‘2009-11-07 06:45:00′, ‘ob’: ‘6.9′},
> ‘GRRW1′: {’fx’: ‘12.8′, ‘obtime’: ‘2009-11-07 04:15:00′, ‘ob’: ‘6.7′}
> }
>
> I have had no luck in trying to figure this out. I am restricted to
> using python 2.4.3.
>
> Any help would be appreciated!
You may be able to work around that limitation by putting the dict items
into a list and sort that:
>>> for item in sorted(mydict.items(), key=lambda (k, v): float(v["ob"]),
reverse=True):
... print item
...
('NASW1', {'fx': '6.8', 'obtime': '2009-11-07 06:30:00', 'ob': '7.1'})
('WILW1', {'fx': '8.1', 'obtime': '2009-11-07 06:45:00', 'ob': '6.9'})
('GRRW1', {'fx': '12.8', 'obtime': '2009-11-07 04:15:00', 'ob': '6.7'})
Peter
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Re: Choosing GUI Module for Python
On Nov 9, 2009, at 3:59 AM, Antony wrote: You may want to offer a little more info, like what exactly you are looking to do with such GUI. are your needs for a VW, Corvette, or Mercedes? etc, etc. All these kits have pros and cons, some better for this some for that, yadda yadda I would like to know about that pros and cons only ... What might be a "pro" for one use case could easily be a "con" for another. For example, Kit-X may be infinitely configurable to run on everything from 800x600 to 1680x1050 pixel monitors with full viewport control, full zoom, pan, etc. and requires that all those cases be handled with correct configuration. That's great if you're writing an application that requires that. But, if you're writing a Pref Pane for OS X, which will never be any bigger than the pref-pane window and will only run on OS X, that particular kit might be a huge waste of time. The "pro" of infinite flexibility becomes a huge "con" for the OS X Pref Pane use-case. S -- http://mail.python.org/mailman/listinfo/python-list
OT: regular expression matching multiple occurrences of one group
How can I make a regular expression that will match every occurrence of a group and return each occurrence as a group match? For example, for a string "-c-c-c-c-c", how can I make a regex which will return a group match for each occurrence of "-c"? -- http://mail.python.org/mailman/listinfo/python-list
Re: advice needed for lazy evaluation mechanism
On Nov 9, 1:34 am, MRAB wrote: > markolopa wrote: > > Hi again, > > > I put a copy of the message and the tarball of the code here (because > > of the problem of line breaks): > > >http://python-advocacy.wikidot.com/comp-lang-python-question > > Here's a slightly different approach: A clean and elegant solution, very impressive! Also a collection of nice Python features I had never used. Thanks a lot! Marko -- http://mail.python.org/mailman/listinfo/python-list
ANN: superpy 1.2.1
I am pleased to announce the release of superpy 1.2.1 available from http://code.google.com/p/superpy. As this is the first announcement of superpy, any comments and feedback would be much appreciated. -- Superpy distributes python programs across a cluster of machines or across multiple processors on a single machine. This is a coarse-grained form of parallelism in the sense that remote tasks generally run in separate processes and do not share memory with the caller. Key features of superpy include: * Send tasks to remote servers or to same machine via XML RPC call * GUI to launch, monitor, and kill remote tasks * GUI can automatically launch tasks every day, hour, etc. * Works on the Microsoft Windows operating system o Can run as a windows service o Jobs submitted to windows can run as submitting user or as service user * Inputs/outputs are python objects via python pickle * Pure python implementation * Supports simple load-balancing to send tasks to best servers The ultimate vision for superpy is that you: 1. Install it as an always on service on a cloud of machines 2. Use the superpy scheduler to easily send python jobs into the cloud as needed 3. Use the SuperWatch GUI to track progress, kill tasks, etc. For smaller deployments, you can use superpy to take advantage of multiple processors on a single machine or multiple machines to maximize computing power. What makes superpy different than the many other excellent parallel processing packages already available for python? The superpy package is designed to allow sending jobs across a large number of machines (both Windows and LINUX). This requires the ability to monitor, debug, and otherwise get information about the status of jobs. While superpy is currently used in production for a number of different purposes, there are still many features we want to add. For a list of future plans and opportunities to help out or add to the discussion, please visit http://code.google.com/p/superpy/wiki/HelpImproveSuperpy. For a quick example of some of the the things superpy can do, check out http://code.google.com/p/superpy/wiki/Demos or in particular the demo application PyFog at http://code.google.com/p/superpy/wiki/PyFog. To install, you can use easy_install to try superpy via "easy_install superpy" or download a python egg from downloads. Of course, you will need python installed and if you are using windows, you should also install the python windows tools from http://sourceforge.net/projects/pywin32/files. See http://code.google.com/p/superpy/wiki/InstallFAQ if you have more questions about installation. -- http://mail.python.org/mailman/listinfo/python-list
Re: Query about doing fortran-esque repeat formatting
Glenn Hutchings wrote: Rob Briggs mun.ca> writes: Is there a way to do a repeat formatting command like in Fortran? Rather that doing this: print "%s %-5.3f %-5.3f %-5.3f %-5.3f %-5.3f %-5.3f %-5.3f" % (parmName[i], tmp[i][1], tmp[i][2], tmp[i][4], tmp[i][6], tmp[i][7], tmp[i][8], tmp[i][9]) There certainly is. You can use python's string concatenation and repeat operators: print "%s" + " %-5.3f" * 7 % Glenn data = tuple(parmName[i]) + tuple(tmp[i]) print "%s" + " %-5.3f" * len(tmp[i]) % data That should do the trick. JM -- http://mail.python.org/mailman/listinfo/python-list
Re: Cancelling a python thread (revisited...)
Le Sun, 08 Nov 2009 21:04:06 -0800, John Nagle a écrit : > Antoine Pitrou wrote: >> John Nagle animats.com> writes: >>> I'd argue against general thread cancellation. Inter-thread >>> signals, though, have safety problems no worse than the first-thread >>> only signals we have now. You're allowed to raise an exception in a >>> signal handler, which is effectively thread cancellation. >> >> Can you give an example of such "cancellation"? In any case, this would >> be a side-effect of the current implementation, not officially >> supported behaviour. > > It's not only documented behavior, it's an example in the official > documentation. See > > http://docs.python.org/library/signal.html#example Well, the only supported behaviour is to send signals to the main thread. Besides, it doesn't "cancel" the thread, it just raises an exception in it, which can be caught and silenced. Just try the following: import signal, time def handler(signum, frame): print 'Signal handler called with signal', signum raise IOError # Set the signal handler and a 5-second alarm signal.signal(signal.SIGALRM, handler) signal.alarm(2) try: time.sleep(10) except IOError: print "got IOError!" -- http://mail.python.org/mailman/listinfo/python-list
Re: username/password dialog prompt
On Nov 6, 4:40 pm, Cousin Stanley wrote: > > My Tkinter is very rusty but perhaps you could do it > > something like this : http://pastebin.com/m5e49da19 > > > I forgot how to get rid of the empty root window > > that appears, sorry. > > root.withdraw() # should do it Thanks to you both - exactly what I was looking for. Much appreciated. -- Dan Winsor Soy un poco loco en el coco. -- http://mail.python.org/mailman/listinfo/python-list
Re: how to remove the same words in the paragraph
I think simple regex may come handy,
p=re.compile(r'(.+) .*\1')#note the space
s=p.search("python and i love python")
s.groups()
(' python',)
But that matches for only one double word.Someone else could light up here
to extract all the double words.Then they can be removed from the original
paragraph.
This has multiple problems:
>>> p = re.compile(r'(.+) .*\1')
>>> s = p.search("python one two one two python")
>>> s.groups()
('python',)
>>> s = p.search("python one two one two python one")
>>> s.groups() # guess what happened to the 2nd "one"...
('python one',)
and even once you have the list of theoretical duplicates (by
changing the regexp to r'\b(\w+)\b.*?\1' perhaps), you still have
to worry about emitting the first instance but not subsequent
instances.
-tkc
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Re: Query about doing fortran-esque repeat formatting
Rob Briggs mun.ca> writes: > Is there a way to do a repeat formatting command like in Fortran? Rather > that doing this: > > print "%s %-5.3f %-5.3f %-5.3f %-5.3f %-5.3f %-5.3f %-5.3f" % > (parmName[i], tmp[i][1], tmp[i][2], tmp[i][4], tmp[i][6], tmp[i][7], > tmp[i][8], tmp[i][9]) There certainly is. You can use python's string concatenation and repeat operators: print "%s" + " %-5.3f" * 7 % Glenn -- http://mail.python.org/mailman/listinfo/python-list
Re: installing library on MAC OS X 10.5.8
Xbiton schrieb: Hi, I'm new to mac and I'm having a lot of problems installing library on mac ox x 10.5.8. I want to install PyXML and although the install procedure - just done like described on the web page of PyXML - That's a 5-years-old XML package. Don't use it. Your python2.5 already features element-tree, which is much nicer to use. Or is there a specific reason you need PyXML? Diez -- http://mail.python.org/mailman/listinfo/python-list
how to close not response win32 IE com interface
hello,
these day im making some script that use win32 IE com interface.
one of problem is , my internet line is very slow, so sometimes my
IE.navigate("http://www.example.com";)
not response timely.
it looks hang and open status, not complete status.
so my IE.navigate function is not correctly working.
anyone can help me? in that case ,how to close or restart my script from
start.
thanks in advance
Paul
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Re: Choosing GUI Module for Python
On Nov 9, 11:49 am, r wrote: > On Nov 8, 10:49 pm, Antony wrote: > > > Hi all > > I just wanted to know which module is best for developing designing > > interface in python . > > i have come across some modules which are listed here . please tell > > your suggestions and comments to choose best one > > 1. PyGTK > > 2. PyQT > > 3. PySide > > 4. wxPython > > 5 . TKinter > > > Also i need to know is there any IDE for developing these > > things . . . > > You may want to offer a little more info, like what exactly you are > looking to do with such GUI. are your needs for a VW, Corvette, or > Mercedes? etc, etc. All these kits have pros and cons, some better for > this some for that, yadda yadda I would like to know about that pros and cons only ... -- http://mail.python.org/mailman/listinfo/python-list
Re: Indentation problems
On Nov 8, 1:48 pm, Tim Chase wrote: > > I am having problems with indentation some times. When I hit the enter key > > after if statements or while statemt there are times when the indentation is > > too much and other times too little. Check for omitted brackets, braces and parenthesis. If you editor uses an auto indent function like even IDLE does then this will be the culprit! -- http://mail.python.org/mailman/listinfo/python-list
Re: Choosing GUI Module for Python
On Nov 8, 10:49 pm, Antony wrote: > Hi all > I just wanted to know which module is best for developing designing > interface in python . > i have come across some modules which are listed here . please tell > your suggestions and comments to choose best one > 1. PyGTK > 2. PyQT > 3. PySide > 4. wxPython > 5 . TKinter > > Also i need to know is there any IDE for developing these > things . . . You may want to offer a little more info, like what exactly you are looking to do with such GUI. are your needs for a VW, Corvette, or Mercedes? etc, etc. All these kits have pros and cons, some better for this some for that, yadda yadda -- http://mail.python.org/mailman/listinfo/python-list
Re: Cancelling a python thread (revisited...)
Antoine Pitrou wrote: John Nagle animats.com> writes: I'd argue against general thread cancellation. Inter-thread signals, though, have safety problems no worse than the first-thread only signals we have now. You're allowed to raise an exception in a signal handler, which is effectively thread cancellation. Can you give an example of such "cancellation"? In any case, this would be a side-effect of the current implementation, not officially supported behaviour. It's not only documented behavior, it's an example in the official documentation. See http://docs.python.org/library/signal.html#example where an exception is raised in a signal handler. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Choosing GUI Module for Python
Hi all I just wanted to know which module is best for developing designing interface in python . i have come across some modules which are listed here . please tell your suggestions and comments to choose best one 1. PyGTK 2. PyQT 3. PySide 4. wxPython 5 . TKinter Also i need to know is there any IDE for developing these things . . . -- http://mail.python.org/mailman/listinfo/python-list
Re: Help with OS X installation
Thanks all. That did it. -- http://mail.python.org/mailman/listinfo/python-list
Re: pythonw.exe under Windows-7 (Won't run for one admin user)
Dennis Lee Bieber wrote: On Fri, 06 Nov 2009 21:19:44 GMT, SD_V897 declaimed the following in gmane.comp.python.general: AppPath=C:\Program Files\Utilities\Python Scripting v2.62\pythonw.exe That's an interesting path... Did the install path for Python (from either python.org or activestate) change that much from 2.5.x, or is that a custom install path (and is it the same path for the accounts it works in). Especially as there is no "v2.62" to my knowledge... a 2.6.2, OTOH... Now... I did change the upper level directory for mine (E:\; my C: partition is rather packed, and I tend to install a lot of packages from my user account), but the installer named top level was "\Python25\pythonw.exe" I've added the folder directory to my PATH statement and also tried installing to the root but it doesn't make a difference. The 2.62 should be 2.64 my bad.. SD -- http://mail.python.org/mailman/listinfo/python-list
Re: String prefix question
Alan Harris-Reid writes: > From what I can gather from the documentation the b prefix represents > a bytes literal Yes. In Python 3 there are two types with similar-looking literal syntax: ‘str’ and ‘bytes’. The types are mutually incompatible (though they can be explicitly converted). http://docs.python.org/3.1/library/stdtypes.html#typesseq> http://docs.python.org/3.1/reference/lexical_analysis.html#strings> > but can anyone explain (in simple english) what this means? It means the difference between “a sequence of bytes” and “a sequence of characters”. The two are not the same, have not ever been the same despite a long history in computing of handwaving the differences, and Python 3 finally makes them unambiguously distinct. A general solution wasn't even feasible for a long time, but now we have Unicode, a mature standard for uniformly representing all the world's writing systems in software. So Python 3 made ‘str’ the Unicode “string of characters” type, and the ‘'foo'’ literal syntax creates objects of this type. The Python 3.1 documentation has a Unicode HOWTO that you should read http://docs.python.org/3.1/howto/unicode.html>. -- \ “We must respect the other fellow's religion, but only in the | `\ sense and to the extent that we respect his theory that his | _o__) wife is beautiful and his children smart.” —Henry L. Mencken | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Debugging python in emacs isn't working.
Hi, Emacs 22.3, python 2.6.4 Put the following into my .emacs: (setq pdb-path 'c:\\python26\\lib\\pdb.py gud-pdb-command-name (symbol-name pdb-path)) (defadvice pdb (before gud-query-cmdline activate) "Provide a better default command line when called interactively." (interactive (list (gud-query-cmdline pdb-path (file-name-nondirectory buffer-file-name) So when I'm in a python buffer (I've tried both python.el and python- mode.el) and do M-x pdb I get, say: c:\python26\lib\pdb.py rpytest.py hit and get an empty buffer that says "Comint: no process". And the status line says: "Spawning child process: invalid argument". I've run into "spawning child process: invalid argument" before but not being an emacs uber-geek I never solved it directly. Hope someone has an idea of what I'm doing wrong. -- http://mail.python.org/mailman/listinfo/python-list
