Re: how to check if a value is a floating point or not
On 06/18/2014 10:53 PM, nicholascann...@gmail.com wrote: I am making a calculator and i need it to support floating point values but i am using the function isnumeric to check if the user has entered an int value. I need the same for floating point types so i could implement an or in the if statement that checks the values the user has entered and allow it to check and use floating points. If you need the source code i am happy to give it to you. Thank you for your help Your mention of *isnumeric* indicates to me that you are using Python3 (correct?) and are wishing to test if a *string* contains characters that represent an int or a float (correct?). The easiest way to test such is to just try to convert it to an int or float, and catch failures as an indication that it is not valid. Something like: try: value = float(s) except ValueError: ... handle invalid string ... Gary Herron -- https://mail.python.org/mailman/listinfo/python-list
Re: how to check if a value is a floating point or not
On Thursday, June 19, 2014 1:53:31 PM UTC+8, Nicholas Cannon wrote: I am making a calculator and i need it to support floating point values but i am using the function isnumeric to check if the user has entered an int value. I need the same for floating point types so i could implement an or in the if statement that checks the values the user has entered and allow it to check and use floating points. If you need the source code i am happy to give it to you. Thank you for your help I am using python 2.7.7 and i have come up with away but there is still possible errors for this. What i did was i this #checks if the user input is an integer value def checkint(a): if a.isnumeric(): return True else: if a.isalpha(): return False else: return True The parameter a is the users input by the raw_input function. I first test if it is normal int with the isnumeric function. Unfortunately this function picks up the decimal as false. This means if the user inputs a float it has to be false. I then test if this input has any alphabetical characters if it does not the user could have only entered something like 12.5 oppose to abc.d. This method works fine and it i have tested it and it works fine. if incase this input did have a letter it would be picked up by the isalpha function. There is one annoying error doing it this way and that is if you enter 12.ab or ab.12 it will say that it is okay. Still working on this so this should get sorted out soon. -- https://mail.python.org/mailman/listinfo/python-list
Re: Understanding Python Code
On Wed, Jun 18, 2014 at 11:50 PM, subhabangal...@gmail.com wrote: Thank you for the reply. But as I checked it again I found, f_prev[k] is giving values of f_curr[st] = e[st][x_i] * prev_f_sum which is calculated later and again uses prev_f_sum. f_prev is the f_curr that was calculated on the previous iteration of the loop. At each iteration after the first, the script calculates f_curr based on the value of f_prev, that is, the old value of f_curr. Then it reassigns the newly computed f_curr to f_prev, making it now the previous, and on the next iteration it creates a new dict to store the next f_curr. Does that make sense? -- https://mail.python.org/mailman/listinfo/python-list
Python 3 on Mac OS X 10.8.4
On my mac i do have : $ python --version Python 2.7.2 I want to install Python 3 such as python-3.4.0-macosx10.6.dmg avoiding disturbing the built-in version. Is that possible ? -- https://mail.python.org/mailman/listinfo/python-list
Re: Under what kind of situation, time.sleep(n) would sleep much longer than n seconds?
Am 19.06.14 01:38, schrieb Chris Angelico: a good console UI just requires this: something = raw_input(Enter something: ) print(Result: +result) That is actually one of the worst console UIs possible. Almost all beginner's courses start with programs like that, requiring the user to key something in in the predefined order of the program. I've never seen a useful mature program working like that, only courseware and maybe crufty FORTRAN stuff from the past. Unless there is good reason, make your program read the data from the command line args and from files given on the command line. This solves a lot of problems with user interaction, e.g. repeating and correcting commands. Programs written in the input() style are very annoying when you made a mistake in the 21st parameter of 30. Good interactive command line tools (e.g. gnuplot, Matlab, IPython, ...) exist, but they are complex; they bind to a readline library and implement a complex command language. My advice: 1) First try parsing the command line. (Example: All Unix tools) 2) If you require more interaction and maybe state preservation, just write a couple of functions and run it in IPython (Example: SciPy) 3) Use a real GUI framework It turns out, that 3) is actually not only easier to use, but often easier to write than 1) Christian -- https://mail.python.org/mailman/listinfo/python-list
Re: how to check if a value is a floating point or not
Nicholas Cannon nicholascann...@gmail.com writes: #checks if the user input is an integer value def checkint(a): if a.isnumeric(): return True else: if a.isalpha(): return False else: return True What code will be using this function? Why would that not be better replaced with a ‘try … except’ construction? That is, don't do this (Look Before You Leap):: foo = get_a_string() if checkint(foo): bar = int(foo) else: bar = None Instead, do this (Easier to Ask Forgiveness than Permission):: foo = get_a_string() try: bar = int(foo) except ValueError: bar = None If you need to create an integer based on a string, just do it, and handle the exception (if any) at an appropriate level. There is one annoying error doing it this way and that is if you enter 12.ab or ab.12 it will say that it is okay. Still working on this so this should get sorted out soon. You are re-inventing a wheel (the ‘int’ callable) which already does all of that properly. Make use of it, and your frustration will be reduced. -- \ “It is far better to grasp the universe as it really is than to | `\persist in delusion, however satisfying and reassuring.” —Carl | _o__)Sagan | Ben Finney -- https://mail.python.org/mailman/listinfo/python-list
Re: how to check if a value is a floating point or not
On Thu, Jun 19, 2014 at 12:48 AM, Nicholas Cannon nicholascann...@gmail.com wrote: On Thursday, June 19, 2014 1:53:31 PM UTC+8, Nicholas Cannon wrote: I am making a calculator and i need it to support floating point values but i am using the function isnumeric to check if the user has entered an int value. I need the same for floating point types so i could implement an or in the if statement that checks the values the user has entered and allow it to check and use floating points. If you need the source code i am happy to give it to you. Thank you for your help I am using python 2.7.7 and i have come up with away but there is still possible errors for this. What i did was i this #checks if the user input is an integer value def checkint(a): if a.isnumeric(): return True else: if a.isalpha(): return False else: return True The parameter a is the users input by the raw_input function. I first test if it is normal int with the isnumeric function. Unfortunately this function picks up the decimal as false. This means if the user inputs a float it has to be false. I then test if this input has any alphabetical characters if it does not the user could have only entered something like 12.5 oppose to abc.d. unicode.isalpha does not test if the input has *any* alphabetic characters. It tests if the input is *only* alphabetic characters. u'12.5'.isalpha() does return False. u'abc.d'.isalpha() *also* returns False, because the decimal point is not alphabetic. I second Gary Herron's suggestion to just try converting the value and catch the exception if it fails. Python already knows how to do this for you; there's no need to reinvent the wheel. -- https://mail.python.org/mailman/listinfo/python-list
Re: how to check if a value is a floating point or not
On Thu, Jun 19, 2014 at 1:23 AM, Ian Kelly ian.g.ke...@gmail.com wrote: On Thu, Jun 19, 2014 at 12:48 AM, Nicholas Cannon nicholascann...@gmail.com wrote: On Thursday, June 19, 2014 1:53:31 PM UTC+8, Nicholas Cannon wrote: I am making a calculator and i need it to support floating point values but i am using the function isnumeric to check if the user has entered an int value. I need the same for floating point types so i could implement an or in the if statement that checks the values the user has entered and allow it to check and use floating points. If you need the source code i am happy to give it to you. Thank you for your help I am using python 2.7.7 and i have come up with away but there is still possible errors for this. What i did was i this #checks if the user input is an integer value def checkint(a): if a.isnumeric(): return True else: if a.isalpha(): return False else: return True The parameter a is the users input by the raw_input function. I first test if it is normal int with the isnumeric function. Unfortunately this function picks up the decimal as false. This means if the user inputs a float it has to be false. I then test if this input has any alphabetical characters if it does not the user could have only entered something like 12.5 oppose to abc.d. unicode.isalpha does not test if the input has *any* alphabetic characters. It tests if the input is *only* alphabetic characters. u'12.5'.isalpha() does return False. u'abc.d'.isalpha() *also* returns False, because the decimal point is not alphabetic. Incidentally, unicode.isnumeric is probably not what you want either. According to the docs, it returns True if there are only numeric characters in S, False otherwise. Numeric characters include digit characters, and all characters that have the Unicode numeric value property, e.g. U+2155, VULGAR FRACTION ONE FIFTH. So that includes strings like u'123⅕⅓Ⅷ٤', which is clearly not an integer. You'd likely do better with unicode.isdigit, and even then you'd be allowing for mixed scripts. -- https://mail.python.org/mailman/listinfo/python-list
Re: Under what kind of situation, time.sleep(n) would sleep much longer than n seconds?
On Thu, Jun 19, 2014 at 5:18 PM, Christian Gollwitzer aurio...@gmx.de wrote: Am 19.06.14 01:38, schrieb Chris Angelico: a good console UI just requires this: something = raw_input(Enter something: ) print(Result: +result) That is actually one of the worst console UIs possible My advice: 1) First try parsing the command line. (Example: All Unix tools) 2) If you require more interaction and maybe state preservation, just write a couple of functions and run it in IPython (Example: SciPy) 3) Use a real GUI framework It turns out, that 3) is actually not only easier to use, but often easier to write than 1) I disagree. It may not be the *best* console UI, but it's not as bad as you think. Yes, what I wrote was a massive oversimplification, but compare this: https://github.com/Rosuav/runningtime/blob/master/runningtime.py#L44 That's a simple, straight-forward UI. If you put the .py file onto your desktop and double-click it, you'll see a series of prompts, and this works on Windows, OS/2, probably Mac OS, and quite a few Linux desktops. (Although I didn't put a shebang on that file, so it might not work on your typical Linux.) How do you make something that provides command line arguments to a double-clicked-on icon? Different for every platform. (And seldom as easy as it is on OS/2.) If you run that in a terminal, you'll see a series of prompts, and it works on probably every Python implementation EVER. If you pull it up in IDLE, it'll probably work there too, although I haven't tried it. You're quite right that parsing the command line is often better for long-term usability. But you try explaining to someone how to provide args to a script. In fact, let's go a bit further: You can't assume that Python was installed in any particular way, you've been told that the OS is some version of Windows you're not familiar with (if you're a Windows expert, then suppose this is some version of Mac OS that you've never touched), and you're talking to the person over the phone. This is, in fact, very similar to the situation I was in last night, except that I wasn't even the person on the phone - my sister was, and I was in the same room as she was. Now, you have no idea whether typing foo.py will run it in Python, and if it does, in what version; you have no idea whether python.exe is in PATH; and you possibly can't even figure out how to open up a command prompt on that system. Yeah, I think [raw_]input() isn't so bad after all. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Python 3 on Mac OS X 10.8.4
On 2014-06-19 07:02:21 +, Une Bévue said: I want to install Python 3 such as python-3.4.0-macosx10.6.dmg avoiding disturbing the built-in version. Is that possible ? The Installer app won't let you see the target path of each package in the metapackage so you'll have to open each of the them (we're talking official binaries since you explicitly named that particular DMG file) and check where they are going to install their content. Most likely they'll go in /usr/local so you won't have clashes with system's python. An alternative is to install and learn to use a package manager, I use MacPorts that requires full Xcode. Brew should require the smaller command line package. Fink should require no additional packages since it's basically APT. There are other managers as well, these are the most common on OS X. -- Andrea -- https://mail.python.org/mailman/listinfo/python-list
Re: Python Fails to Write to File
Thank you very much, that fixed it.
On Thursday, June 19, 2014 12:03:43 AM UTC+1, cutey Love wrote:
I'm trying to write data to a text file
But I'm getting the error:
TypeError: invalid file: _io.TextIOWrapper
Code is
def saveFile():
file_path = filedialog.asksaveasfile(mode='w', filetypes=[('text files',
'.txt')], defaultextension=.txt)
fo = open(file_path, 'w')
for e in myList:
fo.write(e)
fo.close()
The file is being created if not already present but no data is written
--
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Re: Not Responding When Dealing with Large Data
update_idletasks didn't work.
The code is this
file_path = filedialog.askopenfilename(filetypes=[('text files', '.txt')],
multiple=True, defaultextension=.txt)
for path in file_path:
fo = open(path, r)
for line in fo:
if myCase(line.lower()):
myList.append(line.lower())
fo.close()
def myCase(c):
if c in myList:
return False
if len(c) 8 or len(c) 80:
return False
return True
This processes a fair bit of data
On Thursday, June 19, 2014 12:06:26 AM UTC+1, Ian wrote:
On Wed, Jun 18, 2014 at 4:32 PM, cutey Love cuteywithl...@gmail.com wrote:
Hi, thanks for the replies,
I mean windows displays Not responding close the program now
How can I do it asynconistrically?
It's simple code just open file, loop through line by line and do some
comparons with the string.
If all you want is to prevent Windows from displaying that message
then I believe all you need to do is periodically call
frame.update_idletasks() (or the equivalent if you're using some
framework other than tkinter) so that the basic window events will get
processed.
--
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Re: Python Fails to Write to File
On 19/06/2014 08:54, cutey Love wrote: Thank you very much, that fixed it. What do you not understand about top posting and using google groups? -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com -- https://mail.python.org/mailman/listinfo/python-list
Re: Python 3 on Mac OS X 10.8.4
Le 19/06/14 09:52, Andrea D'Amore a écrit : Brew should require the smaller command line package. OK, fine thanks, I'll use brew. -- https://mail.python.org/mailman/listinfo/python-list
urllib/urllib2 support for specifying ip address
I want to run torture tests against an https server on domain A; I have configured apache on the server to respond to a specific hostname ipaddress. I don't want to torture the live server so I have set up an alternate instance on a different ip address. Is there a way to get urlib or urllib2 to use my host name and a specifed ip address? I can always change my hosts file, but that is inconvenient and potentially dangerous. -- Robin Becker -- https://mail.python.org/mailman/listinfo/python-list
Re: Under what kind of situation, time.sleep(n) would sleep much longer than n seconds?
Chris Angelico ros...@gmail.com:
Yeah, I think [raw_]input() isn't so bad after all.
I have never used it.
I *have* used getpass.getpass(). Unfortunately, it doesn't have a
corresponding prompt and raw input variant so I've had to essentially
copy over getpass() code and modify that:
fd = os.open('/dev/tty', os.O_RDWR | os.O_NOCTTY)
input = output = os.fdopen(fd, 'w+', 1)
etc.
Thing is, the standard streams are used for real work instead of
interacting with the user.
Marko
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Re: urllib/urllib2 support for specifying ip address
On Thu, Jun 19, 2014 at 7:22 PM, Robin Becker ro...@reportlab.com wrote: I want to run torture tests against an https server on domain A; I have configured apache on the server to respond to a specific hostname ipaddress. I don't want to torture the live server so I have set up an alternate instance on a different ip address. Since you mention urllib2, I'm assuming this is Python 2.x, not 3.x. The exact version may be significant. Can you simply query the server by IP address rather than host name? According to the docs, urllib2.urlopen() doesn't check the certificate, so it should be accepted. Or does the server insist on the hostname being correct? Failing that, you could monkey-patch socket.create_connection, which seems to be the thing that ultimately does the work. Something like this: import socket. orig_create_connection = socket.create_connection def create_connection(address, *args, **kwargs): if address == domainA: address = 1.2.3.4 return orig_create_connection(address, *args, **kwargs) socket.create_connection = create_connection # Proceed to use urllib2.urlopen() Untested, but may do what you want. Normally, though, I'd look at just changing the hosts file, if at all possible. You're right that it does change state for your whole computer, but it's generally the easiest solution. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Understanding Python Code
On Thursday, June 19, 2014 12:30:12 PM UTC+5:30, Ian wrote: On Wed, Jun 18, 2014 at 11:50 PM, wrote: Thank you for the reply. But as I checked it again I found, f_prev[k] is giving values of f_curr[st] = e[st][x_i] * prev_f_sum which is calculated later and again uses prev_f_sum. f_prev is the f_curr that was calculated on the previous iteration of the loop. At each iteration after the first, the script calculates f_curr based on the value of f_prev, that is, the old value of f_curr. Then it reassigns the newly computed f_curr to f_prev, making it now the previous, and on the next iteration it creates a new dict to store the next f_curr. Does that make sense? Dear Group, The logic seems going fine. I am just trying to cross check things once more, so trying to generate the values and see on myself. I am trying to see this line, prev_f_sum = sum(f_prev[k]*a[k][st] for k in states) a[k][st], and f_prev[k] I could take out and understood. Now as it is doing sum() so it must be over a list, I am trying to understand the number of entities in the list, thinking whether to put len(), and see for which entities it is doing the sum. Experimenting, if any one feels may kindly send any idea. Regards, Subhabrata Banerjee. -- https://mail.python.org/mailman/listinfo/python-list
Re: Python 3 on Mac OS X 10.8.4
On 19/06/2014 08:02, Une Bévue wrote: On my mac i do have : $ python --version Python 2.7.2 I want to install Python 3 such as python-3.4.0-macosx10.6.dmg avoiding disturbing the built-in version. Is that possible ? The python.org packages are explicitly created in order to have no conflict with the system installed python. There is no problem with using them. Yours, Andrew -- https://mail.python.org/mailman/listinfo/python-list
can I get 0./0. to return nan instead of exception?
Can I change behavior of py3 to return nan for 0./0. instead of raising an exception? -- https://mail.python.org/mailman/listinfo/python-list
Re: Not Responding When Dealing with Large Data
On 2014-06-19 09:17, cutey Love wrote:
update_idletasks didn't work.
The code is this
file_path = filedialog.askopenfilename(filetypes=[('text files', '.txt')],
multiple=True, defaultextension=.txt)
for path in file_path:
fo = open(path, r)
for line in fo:
if myCase(line.lower()):
myList.append(line.lower())
fo.close()
def myCase(c):
if c in myList:
return False
if len(c) 8 or len(c) 80:
return False
return True
This processes a fair bit of data
It's quicker to look for something in a set than in a list, so if you
can use a set instead of a list, do so.
Also, checking the length of a string is quick, quicker than searching
a list.
Therefore, before processing the file, do:
mySet = set(myList)
and then you can say:
def myCase(c):
if len(c) 8 or len(c) 80:
return False
if c in mySet:
return False
return True
which can be shortened to:
def myCase(c):
return 8 = len(c) = 80 and c in mySet
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Re: can I get 0./0. to return nan instead of exception?
On Jun 19, 2014 7:05 AM, Neal Becker ndbeck...@gmail.com wrote: Can I change behavior of py3 to return nan for 0./0. instead of raising an exception? There is no nan in python. -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
Re: can I get 0./0. to return nan instead of exception?
On Thu, Jun 19, 2014 at 1:31 PM, Joel Goldstick
joel.goldst...@gmail.com wrote:
On Jun 19, 2014 7:05 AM, Neal Becker ndbeck...@gmail.com wrote:
Can I change behavior of py3 to return nan for 0./0. instead of raising an
exception?
There is no nan in python.
Wrong:
float('nan')
nan
also:
https://docs.python.org/2/library/math.html#math.isnan
Check if the float x is a NaN (not a number). For more information on NaNs,
see the IEEE 754 standards.
--
Chris “Kwpolska” Warrick http://kwpolska.tk
PGP: 5EAAEA16
stop html mail | always bottom-post | only UTF-8 makes sense
--
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Re: urllib/urllib2 support for specifying ip address
.. Since you mention urllib2, I'm assuming this is Python 2.x, not 3.x. The exact version may be significant. I can use python = 3.3 if required. Can you simply query the server by IP address rather than host name? According to the docs, urllib2.urlopen() doesn't check the certificate, so it should be accepted. Or does the server insist on the hostname being correct? Failing that, you could monkey-patch socket.create_connection, which seems to be the thing that ultimately does the work. Something like this: import socket. orig_create_connection = socket.create_connection def create_connection(address, *args, **kwargs): if address == domainA: address = 1.2.3.4 return orig_create_connection(address, *args, **kwargs) socket.create_connection = create_connection # Proceed to use urllib2.urlopen() Untested, but may do what you want. this seems like a way forward Normally, though, I'd look at just changing the hosts file, if at all possible. You're right that it does change state for your whole computer, but it's generally the easiest solution. ChrisA me too, but I want to start torturing from about 10 different servers so plumbum + a python script seems like a good choice and I would not really want to hack the hosts files back and forth on a regular basis. -- Robin Becker -- https://mail.python.org/mailman/listinfo/python-list
Re: can I get 0./0. to return nan instead of exception?
On Thu, Jun 19, 2014 at 9:31 PM, Joel Goldstick joel.goldst...@gmail.com wrote: On Jun 19, 2014 7:05 AM, Neal Becker ndbeck...@gmail.com wrote: Can I change behavior of py3 to return nan for 0./0. instead of raising an exception? There is no nan in python. Yes, there is, but it's not normal to get it as a division result like that. One way is to explicitly try/except: try: result = operand_1 / operand_2 except ZeroDivisionError: result = float(nan) You may also be able to use the fpectl module, if it's available on your system. Alternatively, use either decimal.Decimal or one of the numpy types, both of which give you more flexibility in error handling than the inbuilt float type gives. If you're doing heavy computational work in Python and expect exact IEEE floating point semantics, you should probably be using numpy anyway. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: urllib/urllib2 support for specifying ip address
On Thu, Jun 19, 2014 at 9:51 PM, Robin Becker ro...@reportlab.com wrote: Since you mention urllib2, I'm assuming this is Python 2.x, not 3.x. The exact version may be significant. I can use python = 3.3 if required. The main reason I ask is in case something's changed. Basically, what I did was go to my Python 2 installation (which happens to be 2.7.3, because that's what Debian Wheezy ships with - not sure why it hasn't been updated beyond that), pull up urllib2.py, and step through manually, seeing where the hostname gets turned into an IP address. Hence, this code: import socket. orig_create_connection = socket.create_connection def create_connection(address, *args, **kwargs): if address == domainA: address = 1.2.3.4 return orig_create_connection(address, *args, **kwargs) socket.create_connection = create_connection # Proceed to use urllib2.urlopen() Untested, but may do what you want. this seems like a way forward So if it works, that's great! If it doesn't, and you're on a different version of Python (2.6? 2.4 even?), you might want to look at repeating the exercise I did, with your actual Python. But as a general rule, I'd recommend going with Python 3.x unless you have a good reason for using 2.x. If a feature's been added to let you mock in a different IP address, it'll be in 3.something but probably not in 2.7. Normally, though, I'd look at just changing the hosts file, if at all possible. You're right that it does change state for your whole computer, but it's generally the easiest solution. ChrisA me too, but I want to start torturing from about 10 different servers so plumbum + a python script seems like a good choice and I would not really want to hack the hosts files back and forth on a regular basis. Fair enough. In that case, the best thing to do would probably be monkey-patching, with code along the lines of what I posted above. Make the change as small and as specific as you can. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Backport fix on #16611 to Python 2.7
Sorry, I failed to post reply: -- Forwarded message -- From: Makoto Kuwata k...@kuwata-lab.com Date: Wed, Jun 18, 2014 at 5:32 PM Subject: Re: Backport fix on #16611 to Python 2.7 To: Terry Reedy tjre...@udel.edu On Wed, Jun 18, 2014 at 12:31 PM, Terry Reedy tjre...@udel.edu wrote: Do you have any plan to upgrade to 3.4, so you get *all* the bugfixes possible? Please ask to Google. Google AppEngine doesn't support 3.4 yet. On 6/17/2014 9:08 PM, Mark Lawrence wrote: The simple answer is no. The longer answer is, if you want to propose a patch to backport the fix, it's more likely that somebody will do the work to commit it as support for 2.7 has been extended until 2020. Please note that I said more likely, there's no guarantee given that Python relies so much on volunteers. I got it. Thank you. The extended support is mostly focused on build (compiler) and security (internet) issues, to support software already written and *working* on 2.7. That said, if someone were to modify the patch to it could be imported to 2.7 (at least changing file names) or make changes to the relevant files by hand; run the tests, with whatever changes are needed so that they do run; and change the code as needed so all tests pass; sign the contributor agreement; and post a properly formatted test to the tracker and indicate a readiness to respond to comments; then it might get some attention. -- Terry Jan Reedy I'm sorry if I bothered you. I just want to know whether the existing bugfix will be backported or not. I should be more careful to post even a small question. -- regards, makoto kuwata -- https://mail.python.org/mailman/listinfo/python-list
DHCP query script not work.
Dear all
i got code recipes from here. and i want to run it on win 7.
http://code.activestate.com/recipes/577649-dhcp-query/
i have do some modify and use print to check how it is work, but i am stucked
now.
hope someone can help me. thanks a lot.
i meet this error:
Traceback (most recent call last):
File D:/Workspace/TestExcel/Test/test_DHCP.py, line 138, in module
offer = DHCPOffer(data, discoverPacket.transactionID)
File D:/Workspace/TestExcel/Test/test_DHCP.py, line 82, in __init__
self.unpack()
File D:/Workspace/TestExcel/Test/test_DHCP.py, line 95, in unpack
dnsNB = int(data[268] / 4)
TypeError: unsupported operand type(s) for /: 'str' and 'int'
__author__ = 'Administrator'
'''
Created on Mar 27, 2011
@author: hassane
'''
import socket
import struct
from uuid import getnode as get_mac
from random import randint
def getMacInBytes():
print get_mac()
mac = str(hex(get_mac()))
print mac
mac = mac[2:]
mac = mac[:-1] # i edited
print mac, len(mac)
while len(mac) 12:
mac = '0' + mac
print mac
macb = b''
for i in range(0, 12, 2):
print mac[i:i + 2]
m = int(mac[i:i + 2], 16)
#print m
macb += struct.pack('!B', m)
print repr(macb), struct.calcsize('!B'),++
print macb,==
return macb
class DHCPDiscover:
def __init__(self):
self.transactionID = b''
for i in range(4):
t = randint(0, 255)
self.transactionID += struct.pack('!B', t)
print self.transactionID, ==
def buildPacket(self):
macb = getMacInBytes()
print repr(macb)
packet = b''
packet += b'\x01' # Message type: Boot Request (1)
packet += b'\x01' # Hardware type: Ethernet
packet += b'\x06' # Hardware address length: 6
packet += b'\x00' # Hops: 0
packet += self.transactionID # Transaction ID
packet += b'\x00\x00' # Seconds elapsed: 0
packet += b'\x80\x00' # Bootp flags: 0x8000 (Broadcast) + reserved
flags
packet += b'\x00\x00\x00\x00' # Client IP address: 0.0.0.0
packet += b'\x00\x00\x00\x00' # Your (client) IP address: 0.0.0.0
packet += b'\x00\x00\x00\x00' # Next server IP address: 0.0.0.0
packet += b'\x00\x00\x00\x00' # Relay agent IP address: 0.0.0.0
# packet += b'\x00\x26\x9e\x04\x1e\x9b' #Client MAC address:
00:26:9e:04:1e:9b
packet += macb
packet += b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' #Client hardware
address padding:
packet += b'\x00' * 67 #Server host name not given
packet += b'\x00' * 125 #Boot file name not given
packet += b'\x63\x82\x53\x63' #Magic cookie: DHCP
packet += b'\x35\x01\x01' #Option: (t=53,l=1) DHCP Message Type = DHCP
Discover
#packet += b'\x3d\x06\x00\x26\x9e\x04\x1e\x9b' #Option: (t=61,l=6)
Client identifier
packet += b'\x3d\x06' + macb
packet += b'\x37\x03\x03\x01\x06' #Option: (t=55,l=3) Parameter
Request List
packet += b'\xff' #End Option
return packet
class DHCPOffer:
def __init__(self, data, transID):
self.data = data
self.transID = transID
self.offerIP = ''
self.nextServerIP = ''
self.DHCPServerIdentifier = ''
self.leaseTime = ''
self.router = ''
self.subnetMask = ''
self.DNS = []
self.unpack()
def unpack(self):
if self.data[4:8] == self.transID:
self.offerIP = '.'.join(map(lambda x: str(x), data[16:20]))
self.nextServerIP = '.'.join(map(lambda x: str(x), data[20:24])) #
c'est une option
self.DHCPServerIdentifier = '.'.join(map(lambda x: str(x),
data[245:249]))
self.leaseTime = str(struct.unpack('!L', data[251:255])[0])
self.router = '.'.join(map(lambda x: str(x), data[257:261]))
self.subnetMask = '.'.join(map(lambda x: str(x), data[263:267]))
#print self.router, self.subnetMask, self.leaseTime,
self.DHCPServerIdentifier, repr(self.offerIP)
print repr(data)
print repr(data[268])
dnsNB = int(data[268] / 4)
for i in range(0, 4 * dnsNB, 4):
self.DNS.append('.'.join(map(lambda x: str(x), data[269 + i:269
+ i + 4])))
def printOffer(self):
key = ['DHCP Server', 'Offered IP address', 'subnet mask', 'lease time
(s)', 'default gateway']
val = [self.DHCPServerIdentifier, self.offerIP, self.subnetMask,
self.leaseTime, self.router]
for i in range(4):
print('{0:20s} : {1:15s}'.format(key[i], val[i]))
print('{0:20s}'.format('DNS Servers') + ' : ', ) #end='' here also
have error.
if self.DNS:
print('{0:15s}'.format(self.DNS[0]))
if len(self.DNS) 1:
for i in range(1, len(self.DNS)):
print('{0:22s}
Re: DHCP query script not work.
On Thu, 19 Jun 2014 05:56:57 -0700, 不坏阿峰 wrote: Traceback (most recent call last): File D:/Workspace/TestExcel/Test/test_DHCP.py, line 138, in module offer = DHCPOffer(data, discoverPacket.transactionID) File D:/Workspace/TestExcel/Test/test_DHCP.py, line 82, in __init__ self.unpack() File D:/Workspace/TestExcel/Test/test_DHCP.py, line 95, in unpack dnsNB = int(data[268] / 4) TypeError: unsupported operand type(s) for /: 'str' and 'int' data[268] returns a string. You cannot divide a string by an int. Perhaps you need to change the line to this? dnsNB = int(data[268]) / 4 -- Steven D'Aprano -- https://mail.python.org/mailman/listinfo/python-list
pyhon 1.5.2 problem
Good Day all,
I have the following problem.
This is the python code
#
Import SER
#
SER.set_speed('115200','8N1')
..
..
..
When I run the above code I get the following error :
SER.set_speed('115200','8N1')
AttributeError : set_speed
Can anyone help as this did work before.I have recompiled everything but the
problem still
Exists.
In anticipation,
Many Thanks
Pat
p...@icon.co.za
--
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dangerous content by Pinpoint, and is
believed to be clean.
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Re: DHCP query script not work.
不坏阿峰 wrote: i got code recipes from here. and i want to run it on win 7. http://code.activestate.com/recipes/577649-dhcp-query/ i have do some modify and use print to check how it is work, but i am stucked now. hope someone can help me. thanks a lot. i meet this error: Traceback (most recent call last): File D:/Workspace/TestExcel/Test/test_DHCP.py, line 138, in module offer = DHCPOffer(data, discoverPacket.transactionID) File D:/Workspace/TestExcel/Test/test_DHCP.py, line 82, in __init__ self.unpack() File D:/Workspace/TestExcel/Test/test_DHCP.py, line 95, in unpack dnsNB = int(data[268] / 4) TypeError: unsupported operand type(s) for /: 'str' and 'int' The script is written for Python 3, and you seem to be using a Python 2 interpreter. While dnsNB = int(data[268]/4) would become dnsNB = ord(data[268])/4 in Python 2 that's probably not the only change that needs to be made. For someone not familiar with Python the easiest fix is to install Python 3.4 (you don't need to unistall Python 2) and to run the script as is. -- https://mail.python.org/mailman/listinfo/python-list
Re: DHCP query script not work.
On Thursday, June 19, 2014 8:23:17 PM UTC+7, Peter Otten wrote: 不坏阿峰 wrote: i got code recipes from here. and i want to run it on win 7. http://code.activestate.com/recipes/577649-dhcp-query/ i have do some modify and use print to check how it is work, but i am stucked now. hope someone can help me. thanks a lot. i meet this error: Traceback (most recent call last): File D:/Workspace/TestExcel/Test/test_DHCP.py, line 138, in module offer = DHCPOffer(data, discoverPacket.transactionID) File D:/Workspace/TestExcel/Test/test_DHCP.py, line 82, in __init__ self.unpack() File D:/Workspace/TestExcel/Test/test_DHCP.py, line 95, in unpack dnsNB = int(data[268] / 4) TypeError: unsupported operand type(s) for /: 'str' and 'int' The script is written for Python 3, and you seem to be using a Python 2 interpreter. While dnsNB = int(data[268]/4) would become dnsNB = ord(data[268])/4 in Python 2 that's probably not the only change that needs to be made. For someone not familiar with Python the easiest fix is to install Python 3.4 (you don't need to unistall Python 2) and to run the script as is. yes, i use Python 2.7. i am a beginner learn network program part. i can not modify it myself now, i have trid some days. hope some expert can help me correct this code in Python 2.7. many thanks in advanced. -- https://mail.python.org/mailman/listinfo/python-list
Re: pyhon 1.5.2 problem
Pat Fourie wrote:
Good Day all,
I have the following problem.
This is the python code
#
Import SER
#
SER.set_speed('115200','8N1')
..
..
..
When I run the above code I get the following error :
SER.set_speed('115200','8N1')
AttributeError : set_speed
Can anyone help as this did work before.I have recompiled everything but
the problem still
Exists.
In anticipation,
Did you create a new file called SER.py recently? If so rename that and
don't forget to delete the corresponding SER.pyc.
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Re: DHCP query script not work.
在 2014年6月19日星期四UTC+7下午8时23分17秒，Peter Otten写道： 不坏阿峰 wrote: i got code recipes from here. and i want to run it on win 7. http://code.activestate.com/recipes/577649-dhcp-query/ i have do some modify and use print to check how it is work, but i am stucked now. hope someone can help me. thanks a lot. i meet this error: Traceback (most recent call last): File D:/Workspace/TestExcel/Test/test_DHCP.py, line 138, in module offer = DHCPOffer(data, discoverPacket.transactionID) File D:/Workspace/TestExcel/Test/test_DHCP.py, line 82, in __init__ self.unpack() File D:/Workspace/TestExcel/Test/test_DHCP.py, line 95, in unpack dnsNB = int(data[268] / 4) TypeError: unsupported operand type(s) for /: 'str' and 'int' The script is written for Python 3, and you seem to be using a Python 2 interpreter. While dnsNB = int(data[268]/4) would become dnsNB = ord(data[268])/4 in Python 2 that's probably not the only change that needs to be made. For someone not familiar with Python the easiest fix is to install Python 3.4 (you don't need to unistall Python 2) and to run the script as is. yes, i use Python 2.7. i am a beginner learn network program part. i can not modify it myself now, i have trid some days. hope some expert can help me correct this code in Python 2.7. many thanks in advanced. -- https://mail.python.org/mailman/listinfo/python-list
Re: how to check if a value is a floating point or not
nicholascann...@gmail.com wrote: I am making a calculator and i need it to support floating point values but i am using the function isnumeric to check if the user has entered an int value. I need the same for floating point types so i could implement an or in the if statement that checks the values the user has entered and allow it to check and use floating points. If you need the source code i am happy to give it to you. Thank you for your help It's better to ask forgiveness than ask permission... You don't have to check anything. If the user enters something that cannot be coverted to a float, the function float() will raise an exception: try: x = float(value) except ValueError: # not a float pass Sturla -- https://mail.python.org/mailman/listinfo/python-list
Re: DHCP query script not work.
不坏阿峰 onlydeb...@gmail.com writes: Dear all i got code recipes from here. and i want to run it on win 7. http://code.activestate.com/recipes/577649-dhcp-query/ It works for me as is in Windows 7. It's a Python 3 script though which might be your problem. -- https://mail.python.org/mailman/listinfo/python-list
Re: DHCP query script not work.
On Thursday, June 19, 2014 8:49:21 PM UTC+7, Anssi Saari wrote: 不坏阿峰 onlydeb...@gmail.com writes: Dear all i got code recipes from here. and i want to run it on win 7. http://code.activestate.com/recipes/577649-dhcp-query/ It works for me as is in Windows 7. It's a Python 3 script though which might be your problem. i got that my issue is the Python version , my is 2.7. i am not familiar with 3.and my tools coded by 2.7. i am stucked on this script. tks for ur reply. hope have someone change this script work on 2.7 -- https://mail.python.org/mailman/listinfo/python-list
Re: pyhon 1.5.2 problem
Are you really using Python 1.5.2? Wow. That's really old :-)
Please copy and paste the *full* traceback that Python shows.
A few more comments below:
On Thu, 19 Jun 2014 14:55:36 +0200, Pat Fourie wrote:
This is the python code
#
Import SER
No it isn't. Import SER is a syntax error. Python is case-sensitive,
you mean import SER in lowercase. But the problem is, if you re-type
the code in your message, instead of copying and pasting it, who knows
what other new errors you introduce? We could waste hours trying to debug
code containing errors that don't exist in the original.
Always COPY AND PASTE the EXACT code, do not re-type it from memory.
#
SER.set_speed('115200','8N1')
When I run the above code I get the following error :
SER.set_speed('115200','8N1')
AttributeError : set_speed
Do you have two files called SER, perhaps in different directories? One
contains set_speed function, the other does not?
You should rename one of the files. Also watch out for left-over SER.pyc
files, you should delete them.
--
Steven D'Aprano
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Re: Understanding Python Code
On Thu, Jun 19, 2014 at 3:48 AM, subhabangal...@gmail.com wrote: I am trying to see this line, prev_f_sum = sum(f_prev[k]*a[k][st] for k in states) a[k][st], and f_prev[k] I could take out and understood. Now as it is doing sum() so it must be over a list, I am trying to understand the number of entities in the list, thinking whether to put len(), and see for which entities it is doing the sum. It's summing a generator expression, not a list. If it helps to understand it, you could rewrite that line like this: values_to_be_summed = [] for k in states: values_to_be_summed.append(f_prev[k]*a[k][st]) prev_f_sum = sum(values_to_be_summed) So the number of entities in the list is len(states). -- https://mail.python.org/mailman/listinfo/python-list
Re: Create flowcharts from Python
Is there a library for Python that can easily create flowcharts using a simple API? Graphviz (-TikZ-LaTeX-PDF) But the users want to see this as a visual flowchart too. It would be the best to have it automatically arranged; or at least open it an editor so they can move the nodes and see how they are connected. I think Dia and yEd can im-/export dot (Graphviz format) and/or TikZ. Sincerely, Wolfgang -- https://mail.python.org/mailman/listinfo/python-list
Re: urllib/urllib2 support for specifying ip address
On 19/06/2014 13:03, Chris Angelico wrote: . I can use python = 3.3 if required. The main reason I ask is in case something's changed. Basically, what I did was go to my Python 2 installation (which happens to be 2.7.3, because that's what Debian Wheezy ships with - not sure why it hasn't been updated beyond that), pull up urllib2.py, and step through manually, seeing where the hostname gets turned into an IP address. Hence, this code: . in practice this approach worked well with urllib in python27. -- Robin Becker -- https://mail.python.org/mailman/listinfo/python-list
Re: urllib/urllib2 support for specifying ip address
On Fri, Jun 20, 2014 at 12:19 AM, Robin Becker ro...@reportlab.com wrote: in practice [monkeypatching socket] worked well with urllib in python27. Excellent! That's empirical evidence of success, then. Like with all monkey-patching, you need to keep it as visible as possible, but if your driver script is only a page or two of code, it should be pretty clear what's going on. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Understanding Python Code
On Thursday, June 19, 2014 7:39:42 PM UTC+5:30, Ian wrote: On Thu, Jun 19, 2014 at 3:48 AM, wrote: I am trying to see this line, prev_f_sum = sum(f_prev[k]*a[k][st] for k in states) a[k][st], and f_prev[k] I could take out and understood. Now as it is doing sum() so it must be over a list, I am trying to understand the number of entities in the list, thinking whether to put len(), and see for which entities it is doing the sum. It's summing a generator expression, not a list. If it helps to understand it, you could rewrite that line like this: values_to_be_summed = [] for k in states: values_to_be_summed.append(f_prev[k]*a[k][st]) prev_f_sum = sum(values_to_be_summed) So the number of entities in the list is len(states). Dear Group, Thank you for your kind answer. As I put from the error I discovered it. Please see my experiment almost near to your answer. I am trying one or two questions like, why it is appending only two values at a time. If you want to assist you may kindly help me assist me. Regards, Subhabrata Banerjee. *** MY EXPERIMENT *** else: for k in states: print YYY1,f_prev[k] print YYY2,a[k][st] prev_f_sum1=f_prev[k]*a[k][st] print YYY3,prev_f_sum1 prev_f_sum2 = sum(f_prev[k]*a[k][st] for k in states) print YYY4,prev_f_sum2 *** -- https://mail.python.org/mailman/listinfo/python-list
Re: Not Responding When Dealing with Large Data
On Thu, 19 Jun 2014 12:25:23 +0100, MRAB pyt...@mrabarnett.plus.com wrote: [snip] and then you can say: def myCase(c): if len(c) 8 or len(c) 80: return False if c in mySet: return False return True which can be shortened to: def myCase(c): return 8 = len(c) = 80 and c in mySet Don't you mean . . . return 8 = len(c) = 80 and c not in mySet ? -- To email me, substitute nowhere-spamcop, invalid-net. -- https://mail.python.org/mailman/listinfo/python-list
Re: Not Responding When Dealing with Large Data
On 2014-06-19 17:21, Peter Pearson wrote: On Thu, 19 Jun 2014 12:25:23 +0100, MRAB pyt...@mrabarnett.plus.com wrote: [snip] and then you can say: def myCase(c): if len(c) 8 or len(c) 80: return False if c in mySet: return False return True which can be shortened to: def myCase(c): return 8 = len(c) = 80 and c in mySet Don't you mean . . . return 8 = len(c) = 80 and c not in mySet ? Yes, you're right. -- https://mail.python.org/mailman/listinfo/python-list
Re: Under what kind of situation, time.sleep(n) would sleep much longer than n seconds?
Am 19.06.14 09:42, schrieb Chris Angelico: On Thu, Jun 19, 2014 at 5:18 PM, Christian Gollwitzer aurio...@gmx.de wrote: Am 19.06.14 01:38, schrieb Chris Angelico: a good console UI just requires this: something = raw_input(Enter something: ) print(Result: +result) That is actually one of the worst console UIs possible I disagree. It may not be the *best* console UI, but it's not as bad as you think. Yes, what I wrote was a massive oversimplification, but compare this: https://github.com/Rosuav/runningtime/blob/master/runningtime.py#L44 That's a simple, straight-forward UI. If you put the .py file onto your desktop and double-click it, you'll see a series of prompts, and this works on Windows, OS/2, probably Mac OS, and quite a few Linux desktops. While I don't understand the purpose of the program (is it a game?), it shows exactly why this is a bad idea. Here is my try (OSX): Apfelkiste:Tests chris$ python runningtime.py Enter track length in m: 20 Enter speed limit [400km/h]: 300 Enter track length in m: 10 Enter speed limit [400km/h]: 100 Enter track length in m: 0 () [ 0.00] Power [ 7.85] Enter next section (10m speed 100) [ 8.00] Cruise [ 9.49] Enter next section (0m speed 0) Traceback (most recent call last): File runningtime.py, line 205, in module nextsection, nextspeed = next(section) StopIteration Suppose I want to run it again, but have length 30 in the first step. 1.)How am I going to do this? I have to restart it and key in 4 numbers, whereas I only wanted to change 1. Now let that be 10 segments. 2.) There is no way to save the input or the result. Or it may not be obvious. I could prepare a file with the numbers, then do python runningtime.py input output But then I don't see the prompts and have to be careful not to enter a speed for a length. 3.) The program doesn't tell me how to break out of the entering process and start the computation. Is it a 0? Is it an empty string? I'm getting Tracebacks in either case (could be wrong python version, I'm using the OSX default 2.7.2) All these problems arise because the program forces me to enter the data in a predefined sequence. So no, this is not a good user experience. In a GUI it would be trivial to have an editable listbox for track length and speed, and a set of buttons to save, load, run the computation. Christian -- https://mail.python.org/mailman/listinfo/python-list
Re: Understanding Python Code
On Thursday, June 19, 2014 7:57:38 PM UTC+5:30, wrote:
On Thursday, June 19, 2014 7:39:42 PM UTC+5:30, Ian wrote:
On Thu, Jun 19, 2014 at 3:48 AM, wrote:
I am trying to see this line,
prev_f_sum = sum(f_prev[k]*a[k][st] for k in states)
a[k][st], and f_prev[k] I could take out and understood.
Now as it is doing sum() so it must be over a list,
I am trying to understand the number of entities in the list, thinking
whether to put len(), and see for which entities it is doing the sum.
It's summing a generator expression, not a list. If it helps to
understand it, you could rewrite that line like this:
values_to_be_summed = []
for k in states:
values_to_be_summed.append(f_prev[k]*a[k][st])
prev_f_sum = sum(values_to_be_summed)
So the number of entities in the list is len(states).
Dear Group,
Thank you for your kind answer. As I put from the error I discovered it.
Please see my experiment almost near to your answer. I am trying one or two
questions like, why it is appending only two values at a time. If you want to
assist you may kindly help me assist me.
Regards,
Subhabrata Banerjee.
***
MY EXPERIMENT
***
else:
for k in states:
print YYY1,f_prev[k]
print YYY2,a[k][st]
prev_f_sum1=f_prev[k]*a[k][st]
print YYY3,prev_f_sum1
prev_f_sum2 = sum(f_prev[k]*a[k][st] for k in
states)
print YYY4,prev_f_sum2
***
Dear Group,
Generally most of the issues are tackled here, but as I am trying to cross
check my understanding I found another question,
f_curr[st] = e[st][x_i] * prev_f_sum
Here, if I give one print command and see the results,
print $$2,f_curr
It is showing an iterative update like,
$$2 {'Healthy': 0.3},
$$2 {'Healthy': 0.3, 'Fever': 0.04001}
I was trying to ask how the size is being updated, from 1 to 2 back to 1 again
2... is it for any loop then which one, I tried to change but not being able
to if any one of the esteemed members may kindly help me.
Regards,
Subhabrata Banerjee.
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Re: Understanding Python Code
On Thu, Jun 19, 2014 at 12:44 PM, subhabangal...@gmail.com wrote:
Dear Group,
Generally most of the issues are tackled here, but as I am trying to cross
check my understanding I found another question,
f_curr[st] = e[st][x_i] * prev_f_sum
Here, if I give one print command and see the results,
print $$2,f_curr
It is showing an iterative update like,
$$2 {'Healthy': 0.3},
$$2 {'Healthy': 0.3, 'Fever': 0.04001}
I was trying to ask how the size is being updated, from 1 to 2 back to 1
again 2... is it for any loop then which one, I tried to change but not being
able
to if any one of the esteemed members may kindly help me.
That statement is inside the for loop that builds the f_curr dict. One
state gets calculated on each iteration. The first time it prints, one
state has been added. The second time it prints, two states have been
added. You only have two states, so at that point the loop is done.
The next time it prints, it's on the next iteration of the outer (i,
x_i) loop and it's building a new f_curr dict. So then you see it
adding one state and then the second state to the new dict. And so on
and so forth until the outer loop completes.
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Re: Under what kind of situation, time.sleep(n) would sleep much longer than n seconds?
On Fri, Jun 20, 2014 at 3:17 AM, Christian Gollwitzer aurio...@gmx.de wrote: While I don't understand the purpose of the program (is it a game?), it shows exactly why this is a bad idea. It's a tool for calculating stuff about railway tracks. Never mind about the details of what it does with the info, but the input phase you're talking about is basically building up a speed map of the track - straight-line track has an effective speed limit of 400km/h, curves have lower limits. Here is my try (OSX): Apfelkiste:Tests chris$ python runningtime.py Enter track length in m: 20 Enter speed limit [400km/h]: 300 Enter track length in m: 10 Enter speed limit [400km/h]: 100 Enter track length in m: 0 () [ 0.00] Power [ 7.85] Enter next section (10m speed 100) [ 8.00] Cruise [ 9.49] Enter next section (0m speed 0) Traceback (most recent call last): File runningtime.py, line 205, in module nextsection, nextspeed = next(section) StopIteration Well, you didn't put in enough track for the train to even get started. Basically, you built thirty meters of railway line, then put a suburban train on it (264 meters long - the figure's at the top of the program, although I wouldn't expect anyone to know it; however, it should make perfect sense that a train is more than 30m long!). So the program crashed, because this is an early alpha that's designed to be used by someone who knows what he's doing. If you crank those figures up a bit and, say, put a few km of track down, then it won't bomb. Suppose I want to run it again, but have length 30 in the first step. That would still be extremely odd, but suppose you want length 3000 in the first step. 1.)How am I going to do this? I have to restart it and key in 4 numbers, whereas I only wanted to change 1. Now let that be 10 segments. 2.) There is no way to save the input or the result. Or it may not be obvious. I could prepare a file with the numbers, then do python runningtime.py input output But then I don't see the prompts and have to be careful not to enter a speed for a length. The program is designed to be used with either copy/paste or redirection (you'll note a line comment in the code about redirection) for that sort of scenario, and there's a TODO in the code to have it read sys.argv. Thing is, you're looking at an extremely early alpha that I developed alongside the one person who actually intends to use it; any time spent on a GUI would be wasted at this stage, and even parsing sys.argv to figure out which are file names and which are other things would probably be a waste. Making something more resilient would require design effort (first thought: read two numbers per line, the length and the curve speed, and if it's a single number, it's straight track at maximum speed) and thus would require explanation (so you need to put the two numbers on the same line). It can be left for later. Main point being that the existing UI works, and took almost no effort. It gives us 99% of what we need for 1% of the work. The rest of what we want can be obtained with small refinements, rather than a full rewrite into a GUI. 3.) The program doesn't tell me how to break out of the entering process and start the computation. Is it a 0? Is it an empty string? I'm getting Tracebacks in either case (could be wrong python version, I'm using the OSX default 2.7.2) The traceback when you enter a 0 is because you didn't give it enough track to work with. The traceback on the empty string is because that's a Python 3 program - it uses input() not raw_input() - and you're asking it to eval an empty string. To be honest, I'm impressed that it works as well as it does on 2.7; I never tested it. Definitely some of the multi-arg print calls will produce messy output on 2.7 (they'll be printing tuples), but apparently the rest of the code is so simple that a single __future__ directive and try: input=raw_input except NameError: pass would make it work on 2.7. But we don't need 2.7 support. All these problems arise because the program forces me to enter the data in a predefined sequence. So no, this is not a good user experience. In a GUI it would be trivial to have an editable listbox for track length and speed, and a set of buttons to save, load, run the computation. You're thinking in terms of the wrong sort of user and the wrong scenario. Is it a good user experience to drop you into a completely promptless input space, wait for you to hit Ctrl-D, and then echo back every line you typed, in order? Because that's what the standard Unix sort command does if you give it no args and no redirection. Is that horrible design? Nope. What runningtime.py has may not be 100% perfect, but it's better than the editable listbox for several reasons: 1) Editing is actually not a common operation. Normal is to go through a piece of track (as defined by some external resource), figure out how long it'll take to go through it, and finish. Maybe
Re: Under what kind of situation, time.sleep(n) would sleep much longer than n seconds?
On 6/19/2014 3:42 AM, Chris Angelico wrote: On Thu, Jun 19, 2014 at 5:18 PM, Christian Gollwitzer aurio...@gmx.de wrote: My advice: 1) First try parsing the command line. (Example: All Unix tools) 2) If you require more interaction and maybe state preservation, just write a couple of functions and run it in IPython (Example: SciPy) 3) Use a real GUI framework It turns out, that 3) is actually not only easier to use, but often easier to write than 1) I disagree. It may not be the *best* console UI, but it's not as bad as you think. Yes, what I wrote was a massive oversimplification, but compare this: https://github.com/Rosuav/runningtime/blob/master/runningtime.py#L44 That's a simple, straight-forward UI. If you put the .py file onto your desktop and double-click it, you'll see a series of prompts, and this works on Windows, OS/2, probably Mac OS, and quite a few Linux desktops. (Although I didn't put a shebang on that file, so it might not work on your typical Linux.) How do you make something that provides command line arguments to a double-clicked-on icon? Different for every platform. (And seldom as easy as it is on OS/2.) If you run that in a terminal, you'll see a series of prompts, and it works on probably every Python implementation EVER. If you pull it up in IDLE, it'll probably work there too, although I haven't tried it. Most any* console script runs fine** in Idle once you load it into the editor and press F5. Prompts and prints go the shell window (default blue on white) and input comes from the same (default black on white). * I said most because there must be exceptions, but have no characterization. ** Better than the windows console in some respects. I hope that by the end of the summer, the requirement to load in the editor will be gone. (Run F5 saves to a file anyway for actual execution.) There should also be an option to put output in a new window. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: Under what kind of situation, time.sleep(n) would sleep much longer than n seconds?
On Fri, Jun 20, 2014 at 12:33 PM, Terry Reedy tjre...@udel.edu wrote: Most any* console script runs fine** in Idle once you load it into the editor and press F5. Prompts and prints go the shell window (default blue on white) and input comes from the same (default black on white). I figured it'd be easy, just couldn't say for sure. (To me, IDLE is primarily an interactive interpreter, rather than an editor / script runner.) Thanks for confirming. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
[issue21806] Add tests for turtle.TPen class
Changes by ingrid h...@ingridcheung.com: -- components: Tests files: TPen_tests.patch keywords: patch nosy: ingrid, jesstess priority: normal severity: normal status: open title: Add tests for turtle.TPen class versions: Python 3.5 Added file: http://bugs.python.org/file35688/TPen_tests.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21806 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21807] SysLogHandler closes TCP connection after first message
New submission from Omer Katz:
import logging
import logging.handlers
import socket
logger = logging.getLogger('mylogger')
handler = logging.handlers.SysLogHandler(('',
logging.handlers.SYSLOG_TCP_PORT), socktype=socket.SOCK_STREAM)
formatter = logging.Formatter('%(name)s: [%(levelname)s] %(message)s')
handler.setFormatter(formatter)
logger.addHandler(handler)
logger.info(TEST 1)
logger.info(TEST 2)
I have verified that this code only sends 'TEST 1' to Splunk and syslog-ng on
both Python 2.7 and Python 3.4. After that, the connection appears closed. UDP
on the other hand works just fine.
--
components: Library (Lib)
messages: 220961
nosy: Omer.Katz
priority: normal
severity: normal
status: open
title: SysLogHandler closes TCP connection after first message
versions: Python 2.7, Python 3.4
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[issue21758] Not so correct documentation about asyncio.subprocess_shell method
Roundup Robot added the comment: New changeset 24c356168cc8 by Victor Stinner in branch '3.4': Closes #21758: asyncio doc: mention explicitly that subprocess parameters are http://hg.python.org/cpython/rev/24c356168cc8 New changeset b57cdb945bf9 by Victor Stinner in branch 'default': (Merge 3.4) Closes #21758: asyncio doc: mention explicitly that subprocess http://hg.python.org/cpython/rev/b57cdb945bf9 -- nosy: +python-dev resolution: - fixed stage: - resolved status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21758 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21758] Not so correct documentation about asyncio.subprocess_shell method
STINNER Victor added the comment: A string can be a bytes string or a character string. I modified the documentation to be more explicitly, but IMO it's fine to keep string term in unit tests and error messages. You should not get the string error message if you pass a bytes or str object. -- resolution: fixed - stage: resolved - status: closed - open ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21758 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21808] 65001 code page not supported
New submission from Maries Ionel Cristian: cp65001 is purported to be an alias for utf8. I get these results: C:\Python27chcp 65001 Active code page: 65001 C:\Python27python Python 2.7.6 (default, Nov 10 2013, 19:24:24) [MSC v.1500 64 bit (AMD64)] on win32 Type help, copyright, credits or license for more information. import locale LookupError: unknown encoding: cp65001 LookupError: unknown encoding: cp65001 locale.getpreferredencoding() LookupError: unknown encoding: cp65001 And on Python 3.4 chcp doesn't seem to have any effect: C:\Python34chcp 65001 Active code page: 65001 C:\Python34python Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:38:22) [MSC v.1600 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. import locale locale.getpreferredencoding() 'cp1252' locale.getlocale() (None, None) locale.getlocale(locale.LC_ALL) (None, None) -- components: Interpreter Core, Unicode, Windows messages: 220964 nosy: ezio.melotti, haypo, ionel.mc priority: normal severity: normal status: open title: 65001 code page not supported versions: Python 2.7, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21808 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21595] asyncio: Creating many subprocess generates lots of internal BlockingIOError
Roundup Robot added the comment: New changeset 46c251118799 by Victor Stinner in branch '3.4': Closes #21595: asyncio.BaseSelectorEventLoop._read_from_self() now reads all http://hg.python.org/cpython/rev/46c251118799 New changeset 513eea89b80a by Victor Stinner in branch 'default': (Merge 3.4) Closes #21595: asyncio.BaseSelectorEventLoop._read_from_self() now http://hg.python.org/cpython/rev/513eea89b80a -- nosy: +python-dev resolution: - fixed stage: - resolved status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21595 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21595] asyncio: Creating many subprocess generates lots of internal BlockingIOError
STINNER Victor added the comment: I commited asyncio_read_from_self.patch into Tulip, Python 3.4 and 3.5. If someone is interested to work on more advanced enhancement, please open a new issue. Oh by, a workaround is to limit the number of concurrent processes. Without the patch, ./python test_subprocess_error.py 5 1000 (max: 5 concurrenet processes) emits a lot of BlockingIOError: [Errno 11] Resource temporarily unavailable message. With the patch, I start getting messages with 140 concurrent processes, which is much better :-) IMO more than 100 concurrent processes is crazy, don't do that at home :-) I mean processes with a very short lifetime. The limit is the number of SIGCHLD per second, so the number of processes which end at the same second. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21595 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21326] asyncio: request clearer error message when event loop closed
STINNER Victor added the comment: The initial issue is now fixed, thanks for the report Mark Dickinson. -- resolution: - fixed status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21326 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1191964] add non-blocking read and write methods to subprocess.Popen
Changes by STINNER Victor victor.stin...@gmail.com: -- title: asynchronous Subprocess - add non-blocking read and write methods to subprocess.Popen ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1191964 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21365] asyncio.Task reference misses the most important fact about it, related info spread around intros and example commentary instead
STINNER Victor added the comment: Victor, since you wrote much of the asyncio doc, any comment on this request? Please write a patch. The change is ok. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21365 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16399] argparse: append action with default list adds to list instead of overriding
SylvainDe added the comment:
As this is likely not to get solved, is there a recommanded way to work around
this issue ?
Here's what I have done :
import argparse
def main():
Main function
parser = argparse.ArgumentParser()
parser.add_argument('--foo', action='append')
for arg_str in ['--foo 1 --foo 2', '']:
args = parser.parse_args(arg_str.split())
if not args.foo:
args.foo = ['default', 'value']
print(args)
printing
Namespace(foo=['1', '2'])
Namespace(foo=['default', 'value'])
as expected but I wanted to know if there a more argparse-y way to do this. I
have tried using `set_defaults` without any success.
Also, as pointed out the doc for optparse describes the behavior in a simple
way : The append action calls the append method on the current value of the
option. This means that any default value specified must have an append method.
It also means that if the default value is non-empty, the default elements will
be present in the parsed value for the option, with any values from the command
line appended after those default values.
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[issue21809] Building Python3 on VMS - External repository
New submission from John Malmberg: With issue 16136 VMS support was removed for Python V3 A test build of the in-development branch using the UNIX instruction and the current GNV product with a few minor tweaks produced a Python.exe interpreter that is somewhat functional. Most of the issues that showed up in the build process were either bugs in the VMS C library, or that Python would prefer some additional libraries would be present. These issues are common to porting other software to VMS, and not something that the Python project should need to concern it self with. I have setup a repository on the Sourceforge VMS-PORTS project, and a VMS specific discussion thread for doing the port. https://sourceforge.net/p/vms-ports/discussion/portingprojects/thread/333ab40a/ This is not intended as a fork of the Python project, rather it is a project to provide the build and runtime environment that Python 3 will need on VMS. Description on how to use this repository on VMS: https://sourceforge.net/p/vms-ports/cpython/ci/default/tree/readme The plan is to keep the current status in this file. https://sourceforge.net/p/vms-ports/cpython/ci/default/tree/vms_source/cpython/vms/aaa_readme.txt -- components: Build hgrepos: 257 messages: 220970 nosy: John.Malmberg priority: normal severity: normal status: open title: Building Python3 on VMS - External repository type: enhancement versions: Python 3.5 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21809 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21808] 65001 code page not supported
eryksun added the comment:
cp65001 was added in Python 3.3, for what it's worth. For me codepage 65001
(CP_UTF8) is broken for most console programs.
Windows API WriteFile gets routed to WriteConsoleA for a console buffer handle,
but WriteConsoleA has a different spec. It returns the number of wide
characters written instead of the number of bytes. Then WriteFile returns this
number without adjusting for the fact that 1 character != 1 byte. For example,
the following writes 5 bytes (3 wide characters), but WriteFile returns that
NumberOfBytesWritten is 3:
import sys, msvcrt
from ctypes import windll, c_uint, byref
windll.kernel32.SetConsoleOutputCP(65001)
1
h_out = msvcrt.get_osfhandle(sys.stdout.fileno())
buf = '\u0100\u0101\n'.encode('utf-8')
n = c_uint()
windll.kernel32.WriteFile(h_out, buf, len(buf),
... byref(n), None)
Āā
1
n.value
3
len(buf)
5
There's a similar problem with ReadFile calling ReadConsoleA.
ANSICON (github.com/adoxa/ansicon) can hook WriteFile to fix this for select
programs. However, it doesn't hook ReadFile, so stdin.read remains broken.
import locale
locale.getpreferredencoding()
'cp1252'
The preferred encoding is based on the Windows locale codepage, which is
returned by kernel32!GetACP, i.e. the 'ANSI' codepage. If you want the console
codepages that were set at program startup, look at sys.stdin.encoding and
sys.stdout.encoding:
windll.kernel32.SetConsoleCP(1252)
1
windll.kernel32.SetConsoleOutputCP(65001)
1
script = r'''
... import sys
... print(sys.stdin.encoding, sys.stdout.encoding)
... '''
subprocess.call('py -3 -c %s' % script)
cp1252 cp65001
0
locale.getlocale()
(None, None)
locale.getlocale(locale.LC_ALL)
(None, None)
On most POSIX platforms nowadays, Py_Initialize sets the LC_CTYPE category to
its default value by calling setlocale(LC_CTYPE, ) in order to obtain the
locale's charset without having to switch locales. On the other hand, the
bootstrapping process for Windows doesn't use the C runtime locale, so at
startup LC_CTYPE is still in the default C locale:
locale.setlocale(locale.LC_CTYPE, None)
'C'
This in turn gets parsed into the (None, None) tuple that getlocale() returns:
locale._parse_localename('C')
(None, None)
--
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[issue21808] 65001 code page not supported
STINNER Victor added the comment:
The support of the code page 65001 (CP_UTF8, cp65001) was added in Python
3.3. It is usually used for the OEM code page. The chcp command changes the
Windows console encoding which is used by sys.{stdin,stdout,stderr).encoding.
locale.getpreferredencoding() is the ANSI code page.
Read also:
http://unicodebook.readthedocs.org/operating_systems.html#code-pages
http://unicodebook.readthedocs.org/programming_languages.html#windows
cp65001 is purported to be an alias for utf8.
No, cp65001 is not an alias of utf8: it handles surrogate characters
differently. The behaviour of CP_UTF8 depends on the flags and the Windows
version.
If you really want to use the UTF-8 codec: force the stdio encoding using
PYTHONIOENCODING envrionment variable:
https://docs.python.org/dev/using/cmdline.html#envvar-PYTHONIOENCODING
Setting the Windows console encoding to cp65001 using the chcp command doesn't
make the Windows console fully Unicode compliant. It is a little bit better
using TTF fonts, but it's not enough. See the old issue #1602 opened 7 years
ago and not fixed yet.
Backporting the cp65001 codec requires too many changes in the codec code. I
made these changes between Python 3.1 and 3.3, I don't want to redo them in
Python 2.7 because it may break backward compatibility. For example, in Python
3.3, the strict mode really means strict, whereas in Python 2.7, code page
codecs use the default flags which is not strict. See:
http://unicodebook.readthedocs.org/operating_systems.html#encode-and-decode-functions
So I'm in favor of closing the issue as wont fix. The fix is to upgrade to
Python 3!
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[issue17535] IDLE: Add an option to show line numbers along the left side of the editor window, and have it enabled by default.
Saimadhav Heblikar added the comment:
Attached is a patch which adds linenumbering to IDLE. [1] is the current
discussion regarding this topic at idle-dev.
This patch is a initial patch. It is missing menu and config additions. I have
posted it in this state, so that we can catch platform specific bugs and
performance related issues(if any). In the patch, all major additions are in a
new file LineNumber.py. This is keeping easier debugging in mind. The code will
be restructured in the next version of the patch, which will have the above
said additions and performance optimization(if any).
I will be working on menu additions, config dialog additions and performance
optimization in the mean time.
For those who are interested, I used tk.call(self.text, 'dlineinfo', '%d.0' %
linenum) instead of text.dlineinfo('%d.0' % linenum), because using any text.*
method, used to cause a continuous increase in memory usage. I found this out
the hard way, when, earlier I was making repeated text.index() calls.
---
[1] - https://mail.python.org/pipermail/idle-dev/2014-June/003456.html
--
nosy: +jesstess
versions: +Python 3.5 -Python 3.3
Added file: http://bugs.python.org/file35689/line-numbering-v1.diff
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[issue19870] Backport Cookie fix to 2.7 (httponly / secure flag)
INADA Naoki added the comment: Could someone review this? While this is not a regression or bug, I think this is an important feature when writing HTTP clients. -- nosy: +naoki ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue19870 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21808] 65001 code page not supported
Mark Lawrence added the comment: See also Issue20574. -- nosy: +BreamoreBoy ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21808 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21805] Argparse Revert config_file defaults
R. David Murray added the comment: I don't understand your use case. As a user I would expect a switch to either set the value to true or to false, not to toggle it based on some default that might be changed in a configuration file. But, your method of accomplishing your goal looks fine to me, except that it is unnecessarily verbose. You can just write: const=not config_defaults['verbose'] You might also want to make the help text conditional, so that the user knows whether the switch is going to turn verbosity on or off. You *could* write your own store_opposite action routine, but that seems like overkill, especially if you decide to also make the help text conditional. Given how simple this is to do, I'm rejecting the feature request. -- nosy: +r.david.murray resolution: - rejected stage: - resolved status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21805 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21807] SysLogHandler closes TCP connection after first message
Changes by R. David Murray rdmur...@bitdance.com: -- nosy: +vinay.sajip ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21807 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21808] 65001 code page not supported
R. David Murray added the comment: I agree with Haypo, because if he isn't interested in doing it, it is unlikely anyone else will find the problem tractable :) Certainly not anyone else on the core team. But, the danger of breaking things in 2.7 is the clincher. -- nosy: +r.david.murray resolution: - wont fix stage: - resolved status: open - closed versions: -Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21808 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21809] Building Python3 on VMS - External repository
R. David Murray added the comment: Is the purpose of this issue just informational, then? It would be better to have a listing of active platform forks somewhere in the docs, I think, assuming we don't already. -- nosy: +r.david.murray ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21809 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21808] 65001 code page not supported
eryksun added the comment:
Setting the Windows console encoding to cp65001 using the chcp
command doesn't make the Windows console fully Unicode compliant.
It is a little bit better using TTF fonts, but it's not enough.
See the old issue #1602 opened 7 years ago and not fixed yet.
It's annoyingly broken for me due to the problems with WriteFile and ReadFile.
print('\u0100')
Ā
Note the extra line because write() returns that 2 characters were written
instead of 3 bytes. So the final linefeed byte gets written again.
Let's buy 4 and get 1 free:
print('\u0100' * 4)
Ā
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[issue1576313] os.execvp[e] on win32 fails for current directory
Mark Lawrence added the comment: The patch deliberately says Windows msvcrt to distinguish it from the Python module of the same name. -- Added file: http://bugs.python.org/file35690/Issue1576313.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1576313 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue19870] Backport Cookie fix to 2.7 (httponly / secure flag)
R. David Murray added the comment: If it really wasn't a bug, we couldn't backport it. However, we generally treat RFC non-compliance issues as bugs unless fixing them is disruptive (and this one isn't because I took care to maintain backward compatibility in the original patch), so it is OK to fix it. Since this is a backport and fairly straightforward, Berker can just commit it once he's up and running with his push privileges. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue19870 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21808] 65001 code page not supported
STINNER Victor added the comment: It's annoyingly broken for me due to the problems with WriteFile and ReadFile. sys.stdout.write() doen't use WriteFile. Again, see the issue #1602 if you are interested to improve the Unicode support of the Windows console. A workaround is for example to play with IDLE which has a better Unicode support. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21808 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11352] Update cgi module doc
Mark Lawrence added the comment: @Pierre can you submit a clean patch as requested in msg214267? -- nosy: +BreamoreBoy ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue11352 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9739] Output of help(...) is wider than 80 characters
Mark Lawrence added the comment: @Terry is this something you could take on? -- nosy: +BreamoreBoy versions: +Python 3.5 -Python 3.2 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9739 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21808] 65001 code page not supported
eryksun added the comment:
sys.stdout.write() doen't use WriteFile. Again, see the
issue #1602 if you are interested to improve the Unicode
support of the Windows console.
_write calls WriteFile because Python 3 sets standard I/O to binary mode. The
source is distributed with Visual Studio, so here's the relevant excerpt from
write.c:
else {
/* binary mode, no translation */
if ( WriteFile( (HANDLE)_osfhnd(fh),
(LPVOID)buf,
cnt,
(LPDWORD)written,
NULL) )
{
dosretval = 0;
charcount = written;
}
else
dosretval = GetLastError();
}
In a debugger you can trace that WriteFile detects the handle is a console
buffer handle (the lower 2 tag bits are set on the handle), and redirects the
call to WriteConsoleA, which makes an LPC interprocess call to the console
server (e.g. csrss.exe or conhost.exe). The LPC call, and associated heap
limit, is the reason you had to modify _io.FileIO.write to limit the buffer
size to 32767 when writing to the Windows console. See issue 11395.
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[issue21163] asyncio task possibly incorrectly garbage collected
STINNER Victor added the comment: Ok, I agree that this issue is very tricky :-) The first problem in asyncio-gc-issue.py is that the producer keeps *weak* references to Queue object, so the Queue objects are quickly destroyed, especially if gc.collect() is called explicitly. When yield from queue.get() is used in a task, the task is paused. The queue creates a Future object and the task registers its _wakeup() method into the Future object. When the queue object is destroyed, the internal future object (used by the get() method) is destroyed too. The last reference to the task was in this future object. As a consequence, the task is also destroyed. While there is a bug in asyncio-gc-issue.py, it's very tricky to understand it and I think that asyncio should help developers to detect such bugs. I propose attached patch which emits a warning if a task is destroyed whereas it is not done (its status is still PENDING). I wrote a unit test which is much simpler than asyncio-gc-issue.py. Read the test to understand the issue. I added many comments to explain the state. -- My patch was written for Python 3.4+: it adds a destructor to the Task class, and we cannot add a destructor in Future objects because these objects are likely to be part of reference cycles. See the following issue which proposes a fix: https://code.google.com/p/tulip/issues/detail?id=155 Using this fix for reference cycle, it may be possible to emit also the log in Tulip (Python 3.3). -- keywords: +patch resolution: remind - Added file: http://bugs.python.org/file35691/log_destroyed_pending_task.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21163 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21163] asyncio doesn't warn if a task is destroyed during its execution
Changes by STINNER Victor victor.stin...@gmail.com: -- title: asyncio task possibly incorrectly garbage collected - asyncio doesn't warn if a task is destroyed during its execution ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21163 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21741] Convert most of the test suite to using unittest.main()
Roundup Robot added the comment: New changeset 706fab0213db by Zachary Ware in branch 'default': Issue #21741: Add st_file_attributes to os.stat_result on Windows. http://hg.python.org/cpython/rev/706fab0213db -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21741 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21741] Convert most of the test suite to using unittest.main()
Changes by Zachary Ware zachary.w...@gmail.com: -- Removed message: http://bugs.python.org/msg220987 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21741 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21719] Returning Windows file attribute information via os.stat()
Zachary Ware added the comment: Committed as 706fab0213db (with the wrong issue number), with just a couple of comment tweaks (mostly to shorten a couple more lines) and some committer drudge-work. Thanks for your contribution, Ben! -- assignee: - zach.ware resolution: - fixed stage: patch review - resolved status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21719 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21808] 65001 code page not supported
STINNER Victor added the comment: @eryksun: I agree that using the Python interactive interpreter in the Windows console has many important issues when using non-ASCII characters. But the title of this issue and the initial message is about the code page 65001. The *code page* is supported in Python 3.3 and we are not going to backport the Python codec in Python 2.7. For issues specific to the *Windows console*, there is already an open issue: #1602. It looks like you understand well the problem, so please continue the discussion there. This issue is closed. Stop commenting a closed issue, others will not see your messages (the issue is not listed in the main bug tracker page). (Except if someone is interested to backport the Python codec of the Windows code page 65001 in Python 2.7, so we may reopen the issue.) -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21808 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21719] Returning Windows file attribute information via os.stat()
Ben Hoyt added the comment: Great, thanks for committing! -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21719 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue20295] imghdr add openexr support
Claudiu Popa added the comment: Here's an updated patch with a small exr test file. -- Added file: http://bugs.python.org/file35692/issue20295.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue20295 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15993] Windows: 3.3.0-rc2.msi: test_buffer fails
Steve Dower added the comment: I'd be fine to reconsider if a previously-demonstrated bug is now demonstrated-fixed. However, if the actual bug persists, optimization should be disabled for all code, not just for the code that allows to demonstrate the bug. I'm okay with that. I thought you meant never enable optimizations with that compiler ever again, which is obviously ridiculous and I should have dismissed the idea on that basis rather than posting a snarky response. Sorry. It seems to me that at the time the wrong branch is taken, f-id could be in the registers in the wrong order (same as in msg170985), but when the error message is printed, the value is read from memory. This is just a guess of course. I checked that and the registers are fine. Here's the snippet of disassembly I posted with the bug I filed: mov edx,dword ptr [edi+4] ; == 0x4000 mov ecx,dword ptr [edi]; == 0x0001 testedx,edx ; should be cmp edx,4000h or equiv. ja lbl1 ; 'default:' jb lbl2 ; should be je after change above cmp ecx,21h jbe lbl2 ; should probably be lbl3 lbl1: ; default: ... lbl2: cmp ecx,1 jne lbl3 ; case 0x4001 ... It's clearly an incorrect `test` opcode, and I'd expect switch statements where the first case is a 64-bit integer larger than 2**32 to be rare - I've certainly never encountered one before - which is why such a bug could go undiscovered. When I looked at the disassembly for memoryview it was fine. I actually spent far longer than I should have trying to find the bug that was no longer there... Also bear in mind that I'm working with VC14 and not VC10, so the difference is due to the compiler and not simply time or magic :) -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15993 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21807] SysLogHandler closes TCP connection after first message
Vinay Sajip added the comment: Some information appears to be missing from your snippet: the default logger level is WARNING, so no INFO messages would be expected. Have you set logging.raiseExceptions to a False value? Are you sure that no network error is occurring? How can you be sure the other end isn't closing the connection? I ask these questions, because there is no code called to explicitly close the socket, unless an error occurs. Also, no one else has ever reported this problem, and this code hasn't changed in a long time, IIRC. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21807 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21758] Not so correct documentation about asyncio.subprocess_shell method
Changes by STINNER Victor victor.stin...@gmail.com: -- resolution: - fixed status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21758 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18017] ctypes.PyDLL documentation
Mark Lawrence added the comment: @Marc can you prepare a patch for this issue? -- nosy: +BreamoreBoy ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18017 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16272] C-API documentation clarification for tp_dictoffset
Mark Lawrence added the comment: @Chris can you prepare a patch for this? -- nosy: +BreamoreBoy versions: -Python 2.6, Python 3.1, Python 3.2, Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16272 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21599] Argument transport in attach and detach method in Server class in base_events file is not used
STINNER Victor added the comment: The Server class is hardcoded in create_server() and create_unix_server(), it's not possible to pass an arbitrary class. Only the AbstractServer class is documented, and only close() and wait_for_close() methods: https://docs.python.org/dev/library/asyncio-eventloop.html#asyncio.AbstractServer So it's possible to break the API. The Server API is not really public. @Guido, @Yury: what do you think? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21599 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue20493] select module: loop if the timeout is too large (OverflowError timeout is too large)
Changes by STINNER Victor victor.stin...@gmail.com:
--
title: asyncio: OverflowError('timeout is too large') - select module: loop if
the timeout is too large (OverflowError timeout is too large)
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[issue18612] More elaborate documentation on how list comprehensions and generator expressions relate to each other
Mark Lawrence added the comment: Both list comprehension and generator expression are defined in the glossary https://docs.python.org/3/glossary.html, so what else can be done? -- nosy: +BreamoreBoy ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18612 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18669] curses.chgat() moves cursor, documentation says it shouldn't
Mark Lawrence added the comment: Can we have a comment on this please. -- nosy: +BreamoreBoy versions: -Python 2.6, Python 3.1, Python 3.2, Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18669 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21447] Intermittent asyncio.open_connection / futures.InvalidStateError
STINNER Victor added the comment: I'm unable to reproduce the issue with Python 3.5 (development version). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21447 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18588] timeit examples should be consistent
Mark Lawrence added the comment: @Steven you're into timeit, do you have anything to add here? -- nosy: +BreamoreBoy, steven.daprano ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18588 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18703] To change the doc of html/faq/gui.html
Mark Lawrence added the comment: It looks as if there's nothing to be done here, is that correct? -- nosy: +BreamoreBoy versions: -Python 3.1, Python 3.2, Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18703 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue6673] Uncaught comprehension SyntaxError eats up all memory
Mark Lawrence added the comment: Assuming that documentation changes are needed, who's best placed to do them? -- nosy: +BreamoreBoy ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6673 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
