Re: authentication with python-ldap
Jorge Alberto Diaz Orozco wrote at 2013-5-25 14:00 -0400: I have been doing the same thing and I tried to use java for testing the credentials and they are correct. It works perfectly with java. I really don´t know what we´re doing wrong. Neither do I. But the error message definitely originates from the LDAP server. This means that the server sees different things for the (successful) Java connection and the (unsuccessful) Python connection. Maybe, you can convince your LDAP server administrator to configure a form of logging that allows you to compare the two requests (this may not be easy - because sensitive information is involved). Comparing the requests may provide valuable clues towards the cause of the problem. One may also try some guesswork: There is an important difference between Java and Python 2. Java uses unicode as the typical type for text variables while in Python 2, you use normally the type str for text. str means no unicode but encoded text. When the Java-LDAP bridge passes text to the LDAP server, it must encode the text - and maybe, it uses the correct encoding (the one the LDAP server expects). The Python-LDAP bridge, on the other hand, does not get unicode but str and likely passes the str values directly. Thus, if your str values do not use the correct encoding (the one expected by the LDAP server), things will not work out correctly. I expect the LDAP server to expect the utf-8 encoding. In this case, problems could be expected when the data passed on to the LDAP server contains non ascii characters while all ascii data should not see problems. -- Dieter -- http://mail.python.org/mailman/listinfo/python-list
TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
Hello this is the following snippet that is causing me the error i mention in the Subject: try: cur.execute( '''SELECT url, hits FROM counters ORDER BY hits DESC''' ) data = cur.fetchall() for row in data: (url, hits) = row print( trtdcentera href='http://superhost.gr/?show=logpage=%s'font color=tomato size=5 %s /a/td ) % (url, url) print( tdcenterfont color=cyan size=5 %s /a/td/tr ) % (hits) except pymysql.ProgrammingError as e: print( repr(e) ) you can slso see it at: http://superhost.gr/?show=stats -- http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
Νίκος Γκρ33κ wrote: Hello this is the following snippet that is causing me the error i mention in the Subject: print( trtdcentera href='http://superhost.gr/?show=logpage=%s'font color=tomato size=5 %s /a/td ) % (url, url) Hint (Python 3): print(a=%s, b=%s) % (1, 2) a=%s, b=%s Traceback (most recent call last): File stdin, line 1, in module TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple' print(a=%s, b=%s % (1, 2)) a=1, b=2 -- http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
Τη Κυριακή, 26 Μαΐου 2013 11:23:40 π.μ. UTC+3, ο χρήστης Peter Otten έγραψε: Νίκος Γκρ33κ wrote: Hello this is the following snippet that is causing me the error i mention in the Subject: print( trtdcentera href='http://superhost.gr/?show=logpage=%s'font color=tomato size=5 %s /a/td ) % (url, url) Hint (Python 3): print(a=%s, b=%s) % (1, 2) a=%s, b=%s Traceback (most recent call last): File stdin, line 1, in module TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple' print(a=%s, b=%s % (1, 2)) a=1, b=2 Thank you very much Peter, so as it seems in Python 3.3.1 all substitutuons must be nested in print(). -- http://mail.python.org/mailman/listinfo/python-list
Re: CrazyHTTPd - HTTP Daemon in Python
On 26 May 2013 05:18, Mark Lawrence breamore...@yahoo.co.uk wrote: On 26/05/2013 04:55, cdorm...@gmail.com wrote: This is a small little Project that I have started. Its a light little Web Server (HTTPd) coded in python. Requirements: Python 2.7 = And Linux / BSD. I believe this could work in a CLI Emulator in windows too. Welcome to check out the website powered by CrazyHTTPd: http://web.crazycoder.me:14081/index.html Please Email me with any bugs, errors, and/or comments about my little project: cdorm...@gmail.com IMHO writing a project right now that is limited to Python 2 is about as much use as a chocolate teapot. -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list Agreed. And you should work on WSGI support too. -- http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
Νίκος Γκρ33κ wrote: Thank you very much Peter, so as it seems in Python 3.3.1 all substitutuons must be nested in print(). Yes; in other words: In Python 3 print() is a function. -- http://mail.python.org/mailman/listinfo/python-list
Re: CrazyHTTPd - HTTP Daemon in Python
Mark Lawrence breamore...@yahoo.co.uk wrote: On 26/05/2013 04:55, cdorm...@gmail.com wrote: This is a small little Project that I have started. Its a light little Web Server (HTTPd) coded in python. Requirements: Python 2.7 = And Linux / BSD. I believe this could work in a CLI Emulator in windows too. Welcome to check out the website powered by CrazyHTTPd: http://web.crazycoder.me:14081/index.html Please Email me with any bugs, errors, and/or comments about my little project: cdorm...@gmail.com IMHO writing a project right now that is limited to Python 2 is about as much use as a chocolate teapot. I.e. not very useful, but slightly more so than you would expect: http://www.thenakedscientists.com/HTML/content/kitchenscience/exp/how-useless-is-a-chocolate-teapot/ Adiaŭ Marc -- http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
Perhaps cna you help a bit with tha too:
used to work in 2.6 but not with 3.3.1
#!/usr/bin/python3
# coding=utf-8
import cgitb; cgitb.enable()
import cgi, os, sys
from http import cookies
# initialize cookie
cookie = cookies.SimpleCookie( os.environ.get('HTTP_COOKIE') )
cookie.load( cookie )
nikos = cookie.get('nikos')
# if visitor cookie does exist
if nikos:
msg = ΑΠΟ ΤΗΝ ΕΠΟΜΕΝΗ ΕΠΙΣΚΕΨΗ ΣΟΥ ΘΑ ΣΕ ΥΠΟΛΟΓΙΖΩ ΩΣ ΕΠΙΣΚΕΠΤΗ
ΑΥΞΑΝΟΝΤΑΣ ΤΟΝ ΜΕΤΡΗΤΗ!
cookie['nikos'] = 'admin'
cookie['nikos']['path'] = '/'
cookie['nikos']['expires'] = -1 #this cookie will expire now
else:
msg = ΑΠΟ ΔΩ ΚΑΙ ΣΤΟ ΕΞΗΣ ΔΕΝ ΣΕ ΕΙΔΑ, ΔΕΝ ΣΕ ΞΕΡΩ, ΔΕΝ ΣΕ ΑΚΟΥΣΑ! ΘΑ
ΕΙΣΑΙ ΠΛΕΟΝ Ο ΑΟΡΑΤΟΣ ΕΠΙΣΚΕΠΤΗΣ!!
cookie['nikos'] = 'admin'
cookie['nikos']['path'] = '/'
cookie['nikos']['expires'] = 60*60*24*30*12 #this cookie
will expire in a year
print ( Content-type: text/html; charset=utf-8\n )
print( cookie, msg )
sys.exit(0)
ima getting internal server error.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Piping processes works with 'shell = True' but not otherwise.
Can you please help me understanding what's the difference between the two cases? Hi guys has some of you ideas on what is causing my issue? -- http://mail.python.org/mailman/listinfo/python-list
Short-circuit Logic
Hi, I'm having a hard time wrapping my head around short-circuit logic that's used by Python, coming from a C/C++ background; so I don't understand why the following condition is written this way! if not allow_zero and abs(x) sys.float_info.epsilon: print(zero is not allowed) The purpose of this snippet is to print the given line when allow_zero is False and x is 0. -- http://mail.python.org/mailman/listinfo/python-list
Error when trying to sort and presnt a dictionary in python 3.3.1
python3 pelatologio.py gives me error in this line:
Traceback (most recent call last):
File pelatologio.py, line 283, in lt;modulegt;
''' % (months[key], key) )
KeyError: 1
The code is:
#populating months into a dropdown menu
years = ( 2010, 2011, 2012, 2013 )
months = { 'Ιανουάριος':1, 'Φεβρουάριος':2, 'Μάρτιος':3, 'Απρίλιος':4,
'Μάϊος':5, 'Ιούνιος':6, \
'Ιούλιος':7, 'Αύγουστος':8, 'Σεπτέμβριος':9, 'Οκτώβριος':10,
'Νοέμβριος':11, 'Δεκέμβριος':12 }
print('''
form method=post action=
select name=month
''')
for key in sorted( months.values() ):
print('''
option value=%s %s /option
''' % (months[key], key) )
--
http://mail.python.org/mailman/listinfo/python-list
Re: Short-circuit Logic
In article 5f101d70-e51f-4531-9153-c92ee2486...@googlegroups.com,
Ahmed Abdulshafy abdulsh...@gmail.com wrote:
Hi,
I'm having a hard time wrapping my head around short-circuit logic that's
used by Python, coming from a C/C++ background; so I don't understand why the
following condition is written this way!
if not allow_zero and abs(x) sys.float_info.epsilon:
print(zero is not allowed)
The purpose of this snippet is to print the given line when allow_zero is
False and x is 0.
I don't understand your confusion. Short-circuit evaluation works in
Python exactly the same way it works in C. When you have a boolean
operation, the operands are evaluated left-to-right, and evaluation
stops as soon as the truth value of the expression is known.
In C, you would write:
if (p p-foo) {
blah();
}
to make sure that you don't dereference a null pointer. A similar
example in Python might be:
if d and d[foo]:
blah()
which protects against trying to access an element of a dictionary if
the dictionary is None (which might happen if d was an optional argument
to a method and wasn't passed on this invocation).
But, none of that applies to your example. The condition is
not allow_zero and abs(x) sys.float_info.epsilon:
it's safe to evaluate abs(x) sys.float_info.epsilon no matter what
the value of not allow_zero. For the purposes of understanding your
code, you can pretend that short-circuit evaluation doesn't exist!
So, what is your code doing that you don't understand?
--
http://mail.python.org/mailman/listinfo/python-list
Solving the problem of mutual recursion
I'm not sure if this'll interest anybody, but I expect that I'm going to get some mutual recursion in my simulation, so I needed to see how python handled it. Unfortunately, it falls over once it detects a certain level of recursion. This is reasonable as, otherwise, the stack eventually over-fills. Mostly the recommendation, when this happens, is to re-write the code as loops. Of course, that's not as satisfactory as using recursion. The problem really is that the methods or functions called recursively never exit because they're waiting for the return of the function they've called. Now, if your recursion relies upon knowing what's returned, then this solution won't help you. Often, though, you're not interested in what's returned and would just like the routine to exit once it's called itself, or another process, recursively. If that's the case, this solution, using threads, allows you to have functions call themselves, or each other, indefinitely. It works OK on a macbook pro and the thread count varies from 2-3, so it handles the thread queuing well. I'm not sure how well this will work on other architecture - it'd be interesting to know if anybody tries it. #!/usr/bin/python # Two functions, Jim and Fred, call each other recursively and indefinitely, while the main program continues to execute as well import threading, time def jim(arg,count): print Running jim:, arg,count, Thread Count ,threading.active_count() thread = threading.Thread(target=fred, args=( From Jim ,count +1)) thread.start() print count, Jim complete. Thread Count,threading.active_count() def fred(arg,counter): print Running fred:, arg,counter thread = threading.Thread(target=jim, args=( From Fred ,counter+1)) thread.start() print counter,Fred complete,threading.currentThread() thread = threading.Thread(target=jim, args=( From Main,0)) thread.start() print Jim run from main count = 0 while True: count += 1 print 'In main program',count -- http://mail.python.org/mailman/listinfo/python-list
Output from to_bytes
I don't understand why with the code: for k in range(8,12,1): print(k.to_bytes(2,byteorder='big')) one gets the following output: b'\x00\x08' b'\x00\t' b'\x00\n' b'\x00\x0b' I mean the 2nd and 3rd should be b'\x00\x09' and b'x00\x0a'. Anyway, how could I get the output in the forms I want? Thanks in advance. M. K. Shen -- http://mail.python.org/mailman/listinfo/python-list
Re: Short-circuit Logic
On Sun, 26 May 2013 04:11:56 -0700, Ahmed Abdulshafy wrote: Hi, I'm having a hard time wrapping my head around short-circuit logic that's used by Python, coming from a C/C++ background; so I don't understand why the following condition is written this way! if not allow_zero and abs(x) sys.float_info.epsilon: print(zero is not allowed) Follow the logic. If allow_zero is a true value, then not allow_zero is False, and the and clause cannot evaluate to true. (False and X is always False.) So print is not called. If allow_zero is a false value, then not allow_zero is True, and the and clause depends on the second argument. (True and X is always X.) So abs(x) sys.float_info.epsilon is tested, and if that is True, print is called. By the way, I don't think much of this logic. Values smaller than epsilon are not necessarily zero: py import sys py epsilon = sys.float_info.epsilon py x = epsilon/1 py x == 0 False py x * 3 == 0 False py x + epsilon == 0 False py x + epsilon == epsilon False The above logic throws away many perfectly good numbers and treats them as zero even though they aren't. The purpose of this snippet is to print the given line when allow_zero is False and x is 0. Then the snippet utterly fails at that, since it prints the line for many values of x which can be distinguished from zero. The way to test whether x equals zero is: x == 0 What the above actually tests for is whether x is so small that (1.0+x) cannot be distinguished from 1.0, which is not the same thing. It is also quite arbitrary. Why 1.0? Why not (0.0001+x)? Or (0.0001+x)? Or (1.0+x)? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Error when trying to sort and presnt a dictionary in python 3.3.1
Νίκος Γκρ33κ wrote:
python3 pelatologio.py gives me error in this line:
Traceback (most recent call last):
File pelatologio.py, line 283, in lt;modulegt;
''' % (months[key], key) )
KeyError: 1
The code is:
#populating months into a dropdown menu
years = ( 2010, 2011, 2012, 2013 )
months = { 'Ιανουάριος':1, 'Φεβρουάριος':2, 'Μάρτιος':3, 'Απρίλιος':4,
'Μάϊος':5, 'Ιούνιος':6, \ 'Ιούλιος':7, 'Αύγουστος':8, 'Σεπτέμβριος':9,
'Οκτώβριος':10, 'Νοέμβριος':11, 'Δεκέμβριος':12 }
You have keys and values mixed up...
print('''
form method=post action=
select name=month
''')
for key in sorted( months.values() ):
and calling the value key doesn't help there.
print('''
option value=%s %s /option
''' % (months[key], key) )
At some point you have to admit that coding isn't your cup of tea.
Or Ouzo ;(
--
http://mail.python.org/mailman/listinfo/python-list
Re: Error when trying to sort and presnt a dictionary in python 3.3.1
Τη Κυριακή, 26 Μαΐου 2013 3:20:19 μ.μ. UTC+3, ο χρήστης Peter Otten έγραψε:
At some point you have to admit that coding isn't your cup of tea.
Or Ouzo ;(
And i didn't evne drank anyhting, iam sober! Imagine what i would have written
if i had some shots of Ouzo :-)
I chnage my code to:
months = { 'Ιανουάριος':1, 'Φεβρουάριος':2, 'Μάρτιος':3, 'Απρίλιος':4,
'Μάϊος':5, 'Ιούνιος':6, \
'Ιούλιος':7, 'Αύγουστος':8, 'Σεπτέμβριος':9, 'Οκτώβριος':10,
'Νοέμβριος':11, 'Δεκέμβριος':12 }
print('''
form method=post action=
select name=month
''')
for key in sorted( months.keys() ):
print('''
option value=%s %s /option
''' % (months[key], key) )
print('''
/select '''
Now, iam not getting any eroor from cmd when i 'python3 pelatologio.py'
verythign interprets normally wiyohut an error.
BUT i kepp getting an internal server error when i try to run the script via a
browser (Chrome).
python3 path is ok
uploaded as ascii
chmoded to 755 ok.
How in cmd i get no error while on browser i get internal server error?
--
http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
Anyone seeign somethign wrong? -- http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
On Sun, May 26, 2013 at 11:00 PM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: Anyone seeign somethign wrong? Yes. You're posting requests, then bumping the thread two hours later as though you're entitled to a response quicker than that. Plus, the problems you're seeing ought to be solved by the 2to3 utility. Use it. Look at its output. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Output from to_bytes
On Sun, May 26, 2013 at 10:02 PM, Mok-Kong Shen
mok-kong.s...@t-online.de wrote:
I don't understand why with the code:
for k in range(8,12,1):
print(k.to_bytes(2,byteorder='big'))
one gets the following output:
b'\x00\x08'
b'\x00\t'
b'\x00\n'
b'\x00\x0b'
I mean the 2nd and 3rd should be b'\x00\x09' and b'x00\x0a'.
Anyway, how could I get the output in the forms I want?
They are. If you compare them, you'll find they're identical:
b'\x00\t' == b'\x00\x09'
True
b'\x00\n' == b'\x00\x0a'
True
It's just a representation issue. The repr() of a bytes tries to go
for the shorter representation \n rather than the more verbose \x0a.
(Though I'm not sure why it doesn't also shorten \x00 to \0 - maybe
the \0 notation isn't deemed Pythonic, even though it does work just
fine.) So what you want is a more fixed representation.
What you may find useful here is that iterating over the bytes object
produces integers:
list(b'\0\t')
[0, 9]
So you might be able to do something like this:
print(''.join(('\\x%02x'%x for x in b'\0\t')))
\x00\x09
Or, in your whole loop:
for k in range(8,12,1):
print(''.join(('\\x%02x'%x for x in k.to_bytes(2,byteorder='big'
\x00\x08
\x00\x09
\x00\x0a
\x00\x0b
Does that help?
ChrisA
--
http://mail.python.org/mailman/listinfo/python-list
RE: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
Date: Sun, 26 May 2013 06:00:51 -0700 Subject: Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple' From: nikos.gr...@gmail.com To: python-list@python.org Anyone seeign somethign wrong? -- http://mail.python.org/mailman/listinfo/python-list I don't know any module 'http' in Python standard library. Think you mean the 'http.cookies' module in Python 3. -- http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
Τη Κυριακή, 26 Μαΐου 2013 4:10:02 μ.μ. UTC+3, ο χρήστης Chris Angelico έγραψε: On Sun, May 26, 2013 at 11:00 PM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: Anyone seeign somethign wrong? Yes. You're posting requests, then bumping the thread two hours later as though you're entitled to a response quicker than that. Plus, the problems you're seeing ought to be solved by the 2to3 utility. Use it. Look at its output. ChrisA There is a tool that convert python 2.6.x code = python 3.x ? Can you post a link to that toll plz? -- http://mail.python.org/mailman/listinfo/python-list
Re: Ldap module and base64 oncoding
Joseph L. Casale wrote:
I have some data I am working with that is not being interpreted as a string
requiring
base64 encoding when sent to the ldif module for output.
The base64 string parsed is ZGV0XDMzMTB3YmJccGc= and the raw string is
det\3310wbb\pg.
I'll admit my understanding of the handling requirements of non ascii data in
2.7 is weak
and as such I am failing at adjusting the regex that deduces is the string
contains characters
requiring base64 encoding when being output.
I'm not sure what exactly you're asking for.
Especially is not being interpreted as a string requiring base64 encoding is
written without giving the right context.
So I'm just guessing that this might be the usual misunderstandings with use
of base64 in LDIF. Read more about when LDIF requires base64-encoding here:
http://tools.ietf.org/html/rfc2849
To me everything looks right:
Python 2.7.3 (default, Apr 14 2012, 08:58:41) [GCC] on linux2
Type help, copyright, credits or license for more information.
'ZGV0XDMzMTB3YmJccGc='.decode('base64').decode('utf-8')
u'det\\3310wbb\\pg'
What do you think is a problem?
Ciao, Michael.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Solving the problem of mutual recursion
Peter Brooks writes:
I'm not sure if this'll interest anybody, but I expect that I'm
going to get some mutual recursion in my simulation, so I needed to
...
returned, then this solution won't help you. Often, though, you're
not interested in what's returned and would just like the routine to
exit once it's called itself, or another process, recursively.
If that's the case, this solution, using threads, allows you to have
functions call themselves, or each other, indefinitely. It works OK
on a macbook pro and the thread count varies from 2-3, so it handles
... hard to resist ... but somehow I manage ... whew ...
A light-weighter way is to have each task end by assigning the next
task and returning, instead of calling the next task directly. When a
task returns, a driver loop will call the assigned task, which again
does a bounded amount of work, assigns the next task, and returns.
Tasks can even pass parameters in the same way.
Like so, Dr. Fred keeps adding to a pile as long as there is a pile,
and Mr. Jim keeps taking from it as long as it's there to take from:
from random import choice
def fred():
global fun, arg
print('Fred adds 1')
fun, arg = choice((fred, jim)), arg + 1
def jim():
global fun, arg
print('Jim takes 1')
fun, arg = choice((fred, jim)), arg - 1
if __name__ == '__main__':
fun, arg = choice((fred, jim)), 3
while arg:
print('Pile is', arg, end = '\t')
fun()
else:
print('Pile is gone')
--
http://mail.python.org/mailman/listinfo/python-list
Re: Ldap module and base64 oncoding
Joseph L. Casale wrote: Can you give an example of the code you have? I actually just overrode the regex used by the method in the LDIFWriter class to be far more broad about what it interprets as a safe string. Are you sure that you fully understood RFC 2849 before doing this? Which version of python-ldap are you using? I really need to properly handle reading, manipulating and writing non ascii data to solve this... Module ldif in python-ldap does that for you based on RFC 2849. Without seeing your code using it I cannot tell what's wrong. Shame there is no ldap module (with the ldifwriter) in Python 3. 1. The module ldif is stand-alone. So you could easily make it available for Python 3. 2. Shame is the wrong term here. Personally I currently have no requirement to use Python 3 and I'm quite busy with other things. So contributors are welcome. But they should be willing to do some serious work giving continous support - not only a half-baken patch. Ciao, Michael. -- http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
On Mon, May 27, 2013 at 1:00 AM, nagia.rets...@gmail.com wrote: Τη Κυριακή, 26 Μαΐου 2013 4:10:02 μ.μ. UTC+3, ο χρήστης Chris Angelico έγραψε: On Sun, May 26, 2013 at 11:00 PM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: Anyone seeign somethign wrong? Yes. You're posting requests, then bumping the thread two hours later as though you're entitled to a response quicker than that. Plus, the problems you're seeing ought to be solved by the 2to3 utility. Use it. Look at its output. ChrisA There is a tool that convert python 2.6.x code = python 3.x ? Can you post a link to that toll plz? You have its name. You have Google. You have a mailing list that is getting tired of you not putting in any effort. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Solving the problem of mutual recursion
In article qota9nhu6ag@ruuvi.it.helsinki.fi,
Jussi Piitulainen jpiit...@ling.helsinki.fi wrote:
A light-weighter way is to have each task end by assigning the next
task and returning, instead of calling the next task directly. When a
task returns, a driver loop will call the assigned task, which again
does a bounded amount of work, assigns the next task, and returns.
Tasks can even pass parameters in the same way.
Yup. I've used this pattern for building state machines. Each state is
a function which returns the next state (or, sometimes, a (next_state,
output) tuple). The top level loop ends up looking very much like yours:
state = start
while state != end:
state, output = state(get_next_input())
print output
Like so, Dr. Fred keeps adding to a pile as long as there is a pile,
and Mr. Jim keeps taking from it as long as it's there to take from:
from random import choice
def fred():
global fun, arg
print('Fred adds 1')
fun, arg = choice((fred, jim)), arg + 1
def jim():
global fun, arg
print('Jim takes 1')
fun, arg = choice((fred, jim)), arg - 1
if __name__ == '__main__':
fun, arg = choice((fred, jim)), 3
while arg:
print('Pile is', arg, end = '\t')
fun()
else:
print('Pile is gone')
--
http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
Τη Κυριακή, 26 Μαΐου 2013 6:24:55 μ.μ. UTC+3, ο χρήστης Chris Angelico έγραψε: On Mon, May 27, 2013 at 1:00 AM, nagia.rets...@gmail.com wrote: Τη Κυριακή, 26 Μαΐου 2013 4:10:02 μ.μ. UTC+3, ο χρήστης Chris Angelico έγραψε: On Sun, May 26, 2013 at 11:00 PM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: Anyone seeign somethign wrong? Yes. You're posting requests, then bumping the thread two hours later as though you're entitled to a response quicker than that. Plus, the problems you're seeing ought to be solved by the 2to3 utility. Use it. Look at its output. ChrisA There is a tool that convert python 2.6.x code = python 3.x ? Can you post a link to that toll plz? You have its name. You have Google. You have a mailing list that is getting tired of you not putting in any effort. ChrisA Yes i saw it its name is 2to3 conversion but my code is already written in python3 i ahve written in line byu line from sctatrch ,much like pelatologio.py which when i intreprtet in via cmd i get no errors. i dont understand why iam receiving an internal server error for both in browser mdoe though. -- http://mail.python.org/mailman/listinfo/python-list
Re: Error when trying to sort and presnt a dictionary in python 3.3.1
Τη Κυριακή, 26 Μαΐου 2013 3:58:12 μ.μ. UTC+3, ο χρήστης Νίκος Γκρ33κ έγραψε:
Τη Κυριακή, 26 Μαΐου 2013 3:20:19 μ.μ. UTC+3, ο χρήστης Peter Otten έγραψε:
At some point you have to admit that coding isn't your cup of tea.
Or Ouzo ;(
And i didn't evne drank anyhting, iam sober! Imagine what i would have
written if i had some shots of Ouzo :-)
I chnage my code to:
months = { 'Ιανουάριος':1, 'Φεβρουάριος':2, 'Μάρτιος':3, 'Απρίλιος':4,
'Μάϊος':5, 'Ιούνιος':6, \
'Ιούλιος':7, 'Αύγουστος':8, 'Σεπτέμβριος':9, 'Οκτώβριος':10,
'Νοέμβριος':11, 'Δεκέμβριος':12 }
print('''
form method=post action=
select name=month
''')
for key in sorted( months.keys() ):
print('''
option value=%s %s /option
''' % (months[key], key) )
print('''
/select '''
Now, iam not getting any eroor from cmd when i 'python3 pelatologio.py'
verythign interprets normally wiyohut an error.
BUT i kepp getting an internal server error when i try to run the script via
a browser (Chrome).
python3 path is ok
uploaded as ascii
chmoded to 755 ok.
How in cmd i get no error while on browser i get internal server error?
Its okey i made it work, it wasnt an actuap python issue but an .htaccess and
.htpasswd problem.
All fine now!
--
http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
Here is the live error log coming form apacher when i request the webpage form browser: == /usr/local/apache/logs/error_log == [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] suexec failure: could not open log file [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] fopen: Permission denied [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] fopen: Permission denied [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] Premature end of script headers: koukos.py [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] Premature end of script headers: koukos.py what is that suexec? -- http://mail.python.org/mailman/listinfo/python-list
Re: Help with implementing callback functions using ctypes
On Friday, May 24, 2013 8:56:28 AM UTC+5:30, Dan Stromberg wrote: Cython is good. So is the new cffi, which might be thought of as a safer (API-level) version of ctypes (which is ABI-level). Hi -- can you clarify what is this new CFFI and where I can get it? In the Python 3 library reference I seem to see only CTypes. -- http://mail.python.org/mailman/listinfo/python-list
RE: Ldap module and base64 oncoding
I'm not sure what exactly you're asking for.
Especially is not being interpreted as a string requiring base64 encoding is
written without giving the right context.
So I'm just guessing that this might be the usual misunderstandings with use
of base64 in LDIF. Read more about when LDIF requires base64-encoding here:
http://tools.ietf.org/html/rfc2849
To me everything looks right:
Python 2.7.3 (default, Apr 14 2012, 08:58:41) [GCC] on linux2
Type help, copyright, credits or license for more information.
'ZGV0XDMzMTB3YmJccGc='.decode('base64').decode('utf-8')
u'det\\3310wbb\\pg'
What do you think is a problem?
Michael,
Thanks for the reply. The issues I am sure are in my code, I read the ldif
source file and up
with a values such as 'det\3310wbb\pg' after the base64 encoded entries are
decoded.
The problem I am having is when I add this to an add/mod entry list and write
it back out.
As it does not get re-encoded to base64 the ldif file ends up seeing a text
entry with a ^]
character which if I re-read it with the parser it causes the handle method to
break midway
through the entry dict and so the last half re-appears disjoint without a dn.
Like I said, I am pretty sure its my poor misunderstanding of decoding and
encoding.
I am using the build from http://www.lfd.uci.edu/~gohlke/pythonlibs/ on a
windows
2008 r2 server.
I have re-implemented handle to create a cidict holding all the dn/entry's that
are parsed as
I then perform some processing such as manipulating attribute values in the
entry dict. I
am pretty sure I am breaking things here. The data I am reading is coming from
utf-16-le
encoded files and has Unicode characters as the source directory is globally
available, being
written to in just about every country.
Is there a process for manipulating/adding data to the entry dict before I
write it out that I
should adhere to? For example, if I am adding a new attribute to be composed of
part of
another parsed attr for use in a modlist:
{'customAttr': ['foo.{}.bar'.format(entry['uid'])]}
By looking at the value from above, 'det\3310wbb\pg', I gather the entry dict
was parsed
into byte strings. I should have decoded this, where as some of the data is
Unicode and
as such I should have encoded it?
I really appreciate the time.
Grazie per tutto,
jlc
--
http://mail.python.org/mailman/listinfo/python-list
Encodign issue in Python 3.3.1 (once again)
This is the code that although correct becaus it works with englisg(standARD
ASCII letters) it wont with Greek:
if( log ):
name = log
# print specific client header info
cur.execute('''SELECT hits, money FROM clients WHERE name = %s''',
(name,) )
data = cur.fetchone()
===
The following is the live output of: tail -F /usr/local/apache/logs/error_log
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] Error in
sys.excepthook:, referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] UnicodeEncodeError:
'ascii' codec can't encode characters in position 2050-2056: ordinal not in
range(128), referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] , referer:
http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] Original exception
was:, referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] Traceback (most recent
call last):, referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] File
pelatologio.py, line 122, in module, referer:
http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11]
cur.execute('''SELECT hits, money FROM clients WHERE name = %s''', (name,) ),
referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] File
/opt/python3/lib/python3.3/site-packages/pymysql/cursors.py, line 108, in
execute, referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] query =
query.encode(charset), referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] UnicodeEncodeError:
'latin-1' codec can't encode characters in position 46-52: ordinal not in
range(256), referer: http://superhost.gr/cgi-bin/pelatologio.py
I can udnerstand that this is an encoding issue but i dont knwo how to fix this.
please help.
The search works only for english letters as expected but my cleints have Greek
name and surnames.
--
http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
On 26/05/2013 16:24, Chris Angelico wrote: On Mon, May 27, 2013 at 1:00 AM, nagia.rets...@gmail.com wrote: Τη Κυριακή, 26 Μαΐου 2013 4:10:02 μ.μ. UTC+3, ο χρήστης Chris Angelico έγραψε: On Sun, May 26, 2013 at 11:00 PM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: Anyone seeign somethign wrong? Yes. You're posting requests, then bumping the thread two hours later as though you're entitled to a response quicker than that. Plus, the problems you're seeing ought to be solved by the 2to3 utility. Use it. Look at its output. ChrisA There is a tool that convert python 2.6.x code = python 3.x ? Can you post a link to that toll plz? You have its name. You have Google. You have a mailing list that is getting tired of you not putting in any effort. ChrisA Not to mention double spaced google crap :( -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
On 26/05/2013 17:10, Νίκος Γκρ33κ wrote: Here is the live error log coming form apacher when i request the webpage form browser: == /usr/local/apache/logs/error_log == [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] suexec failure: could not open log file [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] fopen: Permission denied [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] fopen: Permission denied [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] Premature end of script headers: koukos.py [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] Premature end of script headers: koukos.py what is that suexec? What has this got to do with Python? -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Re: Solving the problem of mutual recursion
On May 26, 5:09 pm, Jussi Piitulainen jpiit...@ling.helsinki.fi wrote: A light-weighter way is to have each task end by assigning the next task and returning, instead of calling the next task directly. When a task returns, a driver loop will call the assigned task, which again does a bounded amount of work, assigns the next task, and returns. Tasks can even pass parameters in the same way. Yes, that's true - there are a number of ways of making it linear. What I'm particularly pleased about with my method is the parallelism that it achieves - with so little effort! The simulation is going to be computationally intense and this is going to make sure that the CPUs are all giving it their best shot. When I run this on my macbook, the python interpreter takes over 140% of CPU - with a bit of fine- tuning, it should be possible to have more concurrent threads and to use the four cores optimally. Naturally I'll need to be careful with the concurrency, but this is so simple and clean that it should be easy to avoid the main problems with accessing the same variables. -- http://mail.python.org/mailman/listinfo/python-list
Re: Future standard GUI library
Both the concept and actually implemented examples of so-called web applications prove that they are just plain garbage and hopelessly unusable for anything remotely resembling actual screenwork. HTML forms may be at best useful for web shops, but for actual screenwork, HTML is not a valid GUI, no matter how much javascript you add to it. All depends on your requirements. Obivously, if your requirements are to be compliant with latest IT management fads and to not give a darn for end-user productivity or even legal requirements for screen workplace ergonomics... For the Yosemite Project, I wanted the networking aspect, so the web browser UI was a good one. From the description this looks like a simble database CRUD application. Somethign like that is definitely easier to implement and to deploy and a *lot* more functional with any of the RAD frameworks available for Python. And just like HTML never was a valid GUI framework and never will be one, HTTP will never be a suitable transport layer for a RPC protocol. Sincerely, Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Cutting a deck of cards
Suppose I have a deck of cards, and I shuffle them import random cards = [] decks = 6 cards = list(range(13 * 4 * decks)) random.shuffle(cards) So now I have an array of cards. I would like to cut these cards at some random point (between 1 and 13 * 4 * decks - 1, moving the lower half of that to the top half of the cards array. For some reason, I can't see how this can be done (I know that it must be a simple line or two in Python, but I am really stuck here). Anyone have any direction they can give me on this? Thanks, RVic, python newbie -- http://mail.python.org/mailman/listinfo/python-list
Re: Cutting a deck of cards
On 26/05/2013 18:52, RVic wrote: Suppose I have a deck of cards, and I shuffle them import random cards = [] decks = 6 cards = list(range(13 * 4 * decks)) random.shuffle(cards) So now I have an array of cards. I would like to cut these cards at some random point (between 1 and 13 * 4 * decks - 1, moving the lower half of that to the top half of the cards array. For some reason, I can't see how this can be done (I know that it must be a simple line or two in Python, but I am really stuck here). Anyone have any direction they can give me on this? Thanks, RVic, python newbie The list from its start up to, but excluding, index 'i' is cards[ : i], and the list from index 'i' to its end is cards[i : ]. Now concatenate them those slices. -- http://mail.python.org/mailman/listinfo/python-list
Re: Cutting a deck of cards
I guess, you will have to use list slicing mechanism to achieve the desired result. Hope this helps, Cheers, Kamlesh On Sun, May 26, 2013 at 11:22 PM, RVic rvinc...@gmail.com wrote: Suppose I have a deck of cards, and I shuffle them import random cards = [] decks = 6 cards = list(range(13 * 4 * decks)) random.shuffle(cards) So now I have an array of cards. I would like to cut these cards at some random point (between 1 and 13 * 4 * decks - 1, moving the lower half of that to the top half of the cards array. For some reason, I can't see how this can be done (I know that it must be a simple line or two in Python, but I am really stuck here). Anyone have any direction they can give me on this? Thanks, RVic, python newbie -- http://mail.python.org/mailman/listinfo/python-list -- Faith waiting in the heart of a seed promises a miracle of life which it can not prove! -Ravindranath Tagore -- http://mail.python.org/mailman/listinfo/python-list
RE: Solving the problem of mutual recursion
Date: Sun, 26 May 2013 10:21:05 -0700 Subject: Re: Solving the problem of mutual recursion From: peter.h.m.bro...@gmail.com To: python-list@python.org On May 26, 5:09 pm, Jussi Piitulainen jpiit...@ling.helsinki.fi wrote: A light-weighter way is to have each task end by assigning the next task and returning, instead of calling the next task directly. When a task returns, a driver loop will call the assigned task, which again does a bounded amount of work, assigns the next task, and returns. Tasks can even pass parameters in the same way. Yes, that's true - there are a number of ways of making it linear. What I'm particularly pleased about with my method is the parallelism that it achieves - with so little effort! The simulation is going to be computationally intense and this is going to make sure that the CPUs are all giving it their best shot. When I run this on my macbook, the python interpreter takes over 140% of CPU - with a bit of fine- tuning, it should be possible to have more concurrent threads and to use the four cores optimally. Naturally I'll need to be careful with the concurrency, but this is so simple and clean that it should be easy to avoid the main problems with accessing the same variables. -- http://mail.python.org/mailman/listinfo/python-list Python threads run in the same process and won't run concurrently: CPython implementation detail: In CPython, due to the Global Interpreter Lock, only one thread can execute Python code at once (even though certain performance-oriented libraries might overcome this limitation). If you want your application to make better use of the computational resources of multi-core machines, you are advised to use multiprocessing. However, threading is still an appropriate model if you want to run multiple I/O-bound tasks simultaneously.[1] How can you get 140% of CPU? IS that a typo?? [1] http://docs.python.org/2/library/threading.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Solving the problem of mutual recursion
On 26 May, 20:09, Carlos Nepomuceno carlosnepomuc...@outlook.com wrote: Date: Sun, 26 May 2013 10:21:05 -0700 Subject: Re: Solving the problem of mutual recursion From: peter.h.m.bro...@gmail.com To: python-l...@python.org On May 26, 5:09 pm, Jussi Piitulainen jpiit...@ling.helsinki.fi wrote: A light-weighter way is to have each task end by assigning the next task and returning, instead of calling the next task directly. When a task returns, a driver loop will call the assigned task, which again does a bounded amount of work, assigns the next task, and returns. Tasks can even pass parameters in the same way. Yes, that's true - there are a number of ways of making it linear. What I'm particularly pleased about with my method is the parallelism that it achieves - with so little effort! The simulation is going to be computationally intense and this is going to make sure that the CPUs are all giving it their best shot. When I run this on my macbook, the python interpreter takes over 140% of CPU - with a bit of fine- tuning, it should be possible to have more concurrent threads and to use the four cores optimally. Naturally I'll need to be careful with the concurrency, but this is so simple and clean that it should be easy to avoid the main problems with accessing the same variables. -- http://mail.python.org/mailman/listinfo/python-list Python threads run in the same process and won't run concurrently: CPython implementation detail: In CPython, due to the Global Interpreter Lock, only one thread can execute Python code at once (even though certain performance-oriented libraries might overcome this limitation). If you want your application to make better use of the computational resources of multi-core machines, you are advised to use multiprocessing. However, threading is still an appropriate model if you want to run multiple I/O-bound tasks simultaneously.[1] How can you get 140% of CPU? IS that a typo?? No, on a multi-core machine it's normal. The machine shows python running multiple threads - and the number of threads change as the program runs. Perhaps the OS/X implementation of python does allow concurrency when others don't. It certainly looks like it! -- http://mail.python.org/mailman/listinfo/python-list
RE: Cutting a deck of cards
Date: Sun, 26 May 2013 10:52:14 -0700 Subject: Cutting a deck of cards From: rvinc...@gmail.com To: python-list@python.org Suppose I have a deck of cards, and I shuffle them import random cards = [] decks = 6 cards = list(range(13 * 4 * decks)) random.shuffle(cards) So now I have an array of cards. I would like to cut these cards at some random point (between 1 and 13 * 4 * decks - 1, moving the lower half of that to the top half of the cards array. For some reason, I can't see how this can be done (I know that it must be a simple line or two in Python, but I am really stuck here). Anyone have any direction they can give me on this? Thanks, RVic, python newbie -- http://mail.python.org/mailman/listinfo/python-list list(range(13 * 4 * decks)) == range(13 * 4 * decks) ;) -- http://mail.python.org/mailman/listinfo/python-list
Re: Future standard GUI library
In article 20130526194310.9cdb1be80b42c7fdf0ba5...@gmx.net, Wolfgang Keller felip...@gmx.net wrote: HTTP will never be a suitable transport layer for a RPC protocol. What, in particular, is wrong with HTTP for doing RPC? RPC is pretty straight-forward. Take this method, run it over there, with these arguments, and give me back the result. HTTP handles that just fine, with your choice of XML, JSON, or whatever turns you on for the content encoding. There are protocols that are more efficient (mostly binary ones like Thrift and Protocol Buffers), but for a lot of things, the simplicity and convenience of HTTP is worth than the efficiency hit. It's really nice to be able to slap together HTTP components like load balancers and caches by just editing a few config files. -- http://mail.python.org/mailman/listinfo/python-list
Re: Cutting a deck of cards
Ah, brilliant -- yes, this is so much more elegant in Python: #now cut the cards x = random.randrange(2,range(13 * 4 * decks)) cards = cards[x:]+cards[:x] -- http://mail.python.org/mailman/listinfo/python-list
Re: Encodign issue in Python 3.3.1 (once again)
Any idea how to correct this encoding issue? -- http://mail.python.org/mailman/listinfo/python-list
RE: Solving the problem of mutual recursion
Date: Sun, 26 May 2013 11:13:12 -0700 Subject: Re: Solving the problem of mutual recursion From: peter.h.m.bro...@gmail.com To: python-list@python.org [...] How can you get 140% of CPU? IS that a typo?? No, on a multi-core machine it's normal. The machine shows python running multiple threads - and the number of threads change as the program runs. Perhaps the OS/X implementation of python does allow concurrency when others don't. It certainly looks like it! I pretty sure it doesn't run on multiple cores on Linux and Windows. I've tested it and have been trying to find a better way achieve concurrency in Python. One of the ways is the multiprocessing module[1]. Do Mac OS shows 140% CPU load when more than a single core is been used? lol Apple sucks!!! lol [1] http://docs.python.org/2/library/multiprocessing.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Cutting a deck of cards
In article 4d02f46f-8264-41bf-a254-d1c204696...@googlegroups.com, RVic rvinc...@gmail.com wrote: Suppose I have a deck of cards, and I shuffle them import random cards = [] decks = 6 cards = list(range(13 * 4 * decks)) random.shuffle(cards) So now I have an array of cards. I would like to cut these cards at some random point (between 1 and 13 * 4 * decks - 1, moving the lower half of that to the top half of the cards array. For some reason, I can't see how this can be done (I know that it must be a simple line or two in Python, but I am really stuck here). Anyone have any direction they can give me on this? Thanks, RVic, python newbie import random i = random.randrange(len(cards)) cut1 = cards[:i] cut2 = cards[i:] I haven't thought too much about the boundary conditions, but that's the general idea. -- http://mail.python.org/mailman/listinfo/python-list
RE: Future standard GUI library
From: felip...@gmx.net Subject: Re: Future standard GUI library Date: Sun, 26 May 2013 19:43:10 +0200 To: python-list@python.org [...] one, HTTP will never be a suitable transport layer for a RPC protocol. Sincerely, Wolfgang Please give me an example of a suitable transport layer for a RPC protocol. -- http://mail.python.org/mailman/listinfo/python-list
RE: Help with implementing callback functions using ctypes
https://cffi.readthedocs.org/en/release-0.6/ Date: Sun, 26 May 2013 09:12:10 -0700 Subject: Re: Help with implementing callback functions using ctypes From: samj...@gmail.com To: python-list@python.org On Friday, May 24, 2013 8:56:28 AM UTC+5:30, Dan Stromberg wrote: Cython is good. So is the new cffi, which might be thought of as a safer (API-level) version of ctypes (which is ABI-level). Hi -- can you clarify what is this new CFFI and where I can get it? In the Python 3 library reference I seem to see only CTypes. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Future standard GUI library
On Mon, May 27, 2013 at 3:43 AM, Wolfgang Keller felip...@gmx.net wrote: For the Yosemite Project, I wanted the networking aspect, so the web browser UI was a good one. From the description this looks like a simble database CRUD application. Somethign like that is definitely easier to implement and to deploy and a *lot* more functional with any of the RAD frameworks available for Python. And just like HTML never was a valid GUI framework and never will be one, HTTP will never be a suitable transport layer for a RPC protocol. No, it's basically a modified version of a file browser; you get a directory listing, you can browse subdirectories, and selecting a file causes an action to happen on the server. You also have some action buttons that provide a measure of control: click a button and something is done (eg a key is pressed, or a 'killall' command is fired). The browser works just fine. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Solving the problem of mutual recursion
On 26 May, 20:22, Carlos Nepomuceno carlosnepomuc...@outlook.com wrote: Date: Sun, 26 May 2013 11:13:12 -0700 Subject: Re: Solving the problem of mutual recursion From: peter.h.m.bro...@gmail.com To: python-l...@python.org [...] How can you get 140% of CPU? IS that a typo?? No, on a multi-core machine it's normal. The machine shows python running multiple threads - and the number of threads change as the program runs. Perhaps the OS/X implementation of python does allow concurrency when others don't. It certainly looks like it! I pretty sure it doesn't run on multiple cores on Linux and Windows. I've tested it and have been trying to find a better way achieve concurrency in Python. One of the ways is the multiprocessing module[1]. Do Mac OS shows 140% CPU load when more than a single core is been used? lol Apple sucks!!! lol It's not uncommon - HP-UX does exactly the same thing. -- http://mail.python.org/mailman/listinfo/python-list
Re: Help with implementing callback functions using ctypes
On Sun, May 26, 2013 at 9:12 AM, Shriramana Sharma samj...@gmail.comwrote: On Friday, May 24, 2013 8:56:28 AM UTC+5:30, Dan Stromberg wrote: Cython is good. So is the new cffi, which might be thought of as a safer (API-level) version of ctypes (which is ABI-level). Hi -- can you clarify what is this new CFFI and where I can get it? In the Python 3 library reference I seem to see only CTypes. CFFI is like CTypes, but it allows you to do things like see C preprocessor symbols. https://cffi.readthedocs.org/en/release-0.6/ I don't think it comes with CPython, at least not yet. But I believe it comes with the latest Pypy. -- http://mail.python.org/mailman/listinfo/python-list
Re: Solving the problem of mutual recursion
On Sun, May 26, 2013 at 12:13 PM, Peter Brooks peter.h.m.bro...@gmail.com wrote: No, on a multi-core machine it's normal. The machine shows python running multiple threads - and the number of threads change as the program runs. Perhaps the OS/X implementation of python does allow concurrency when others don't. It certainly looks like it! I'm pretty sure that CPython uses the GIL regardless of platform. And yes you can have multiple OS-level threads, but because of the GIL only one will actually be running at a time. Other possibilities include: 1) You're using a different implementation of Python that does not have a GIL, e.g. Jython or IronPython (well, probably not the latter). I believe PyPy also has a GIL-less version, although I don't think this is in the current release yet. 2) You're using a fork of CPython that removes the GIL. There are a number of these, but none to my knowledge that are able to maintain the performance of CPython for a single thread. 3) You're mistakenly looking at multiple Python processes that are running simultaneously and adding their usages together. 4) The utility you're using is reporting the process CPU usage incorrectly. 5) Maybe for some reason the Mac OS X build of CPython is using spin-locks in the GIL. I can't imagine why this would be the case. -- http://mail.python.org/mailman/listinfo/python-list
Re: Future standard GUI library
On 05/26/2013 11:43 AM, Wolfgang Keller wrote: And just like HTML never was a valid GUI framework and never will be one, HTTP will never be a suitable transport layer for a RPC protocol. On good thing web development has brought us is the knowledge that modularization and layers are a brilliant idea. Your back end exposes services and business logic, and your front end can be in HTMLv5 and Javascript, or QtQuick, PyGTK, or Visual Studio. If you do need a native interface, it's a heck of a lot easier to rewrite just the frontend then the entire stack. Who cares how the RPC is done; that's an implementation detail. HTTP does happen to work well though. Why do you say it is not suitable? From the description this looks like a simble database CRUD application. Somethign like that is definitely easier to implement and to deploy and a *lot* more functional with any of the RAD frameworks available for Python. Chuckle. Simple CRUD, eh. Almost all apps involve database CRUD interactions. And often in highly complex ways using business logic. Maybe it would have been faster to develop, but ultimately less useful and require more development time in the long run. suppose I now want the app natively on my phone (because that's all the rage). It's an iPhone. Oh. Apple doesn't support Python. Okay, rewrite the works, including business logic, in Objective C. Now I want it on my android phone. Oops rewrite the stack again in Java. Since his application by nature is network oriented (client/server I presume since he mentions multiple users), sticking it on a web server and having the front end be separate (be it HTML or not) gives him the flexibility to rapidly build native screenable UIs for his app on any platform he chooses, something your philosophy does not allow for. -- http://mail.python.org/mailman/listinfo/python-list
Re: Cutting a deck of cards
Carlos Nepomuceno carlosnepomuc...@outlook.com wrote: Date: Sun, 26 May 2013 10:52:14 -0700 Subject: Cutting a deck of cards From: rvinc...@gmail.com To: python-list@python.org Suppose I have a deck of cards, and I shuffle them import random cards = [] decks = 6 cards = list(range(13 * 4 * decks)) random.shuffle(cards) So now I have an array of cards. I would like to cut these cards at some random point (between 1 and 13 * 4 * decks - 1, moving the lower half of that to the top half of the cards array. For some reason, I can't see how this can be done (I know that it must be a simple line or two in Python, but I am really stuck here). Anyone have any direction they can give me on this? Thanks, RVic, python newbie -- http://mail.python.org/mailman/listinfo/python-list list(range(13 * 4 * decks)) == range(13 * 4 * decks) ;) Not in Python3.x decks = 6 list(range(13 * 4 * decks)) == range(13 * 4 * decks) False Adiaŭ Marc -- http://mail.python.org/mailman/listinfo/python-list
Re: Future standard GUI library
In article mailman.2193.1369597318.3114.python-l...@python.org, Michael Torrie torr...@gmail.com wrote: On good thing web development has brought us is the knowledge that modularization and layers are a brilliant idea. Modularization and layers were a brilliant idea long before the web came around. -- http://mail.python.org/mailman/listinfo/python-list
Re: Ldap module and base64 oncoding
Joseph L. Casale wrote:
I'm not sure what exactly you're asking for.
Especially is not being interpreted as a string requiring base64 encoding
is
written without giving the right context.
So I'm just guessing that this might be the usual misunderstandings with use
of base64 in LDIF. Read more about when LDIF requires base64-encoding here:
http://tools.ietf.org/html/rfc2849
To me everything looks right:
Python 2.7.3 (default, Apr 14 2012, 08:58:41) [GCC] on linux2
Type help, copyright, credits or license for more information.
'ZGV0XDMzMTB3YmJccGc='.decode('base64').decode('utf-8')
u'det\\3310wbb\\pg'
What do you think is a problem?
Thanks for the reply. The issues I am sure are in my code, I read the ldif
source file and up
with a values such as 'det\3310wbb\pg' after the base64 encoded entries are
decoded.
The problem I am having is when I add this to an add/mod entry list and write
it back out.
As it does not get re-encoded to base64 the ldif file ends up seeing a text
entry with a ^]
character which if I re-read it with the parser it causes the handle method
to break midway
through the entry dict and so the last half re-appears disjoint without a dn.
Like I said, I am pretty sure its my poor misunderstanding of decoding and
encoding.
I am using the build from http://www.lfd.uci.edu/~gohlke/pythonlibs/ on a
windows
2008 r2 server.
I have re-implemented handle to create a cidict holding all the dn/entry's
that are parsed as
I then perform some processing such as manipulating attribute values in the
entry dict. I
am pretty sure I am breaking things here. The data I am reading is coming
from utf-16-le
encoded files and has Unicode characters as the source directory is globally
available, being
written to in just about every country.
Processing LDIF is one thing, doing LDAP operations another.
LDIF itself is meant to be ASCII-clean. But each attribute value can carry any
byte sequence (e.g. attribute 'jpegPhoto'). There's no further processing by
module LDIF - it simply returns byte sequences.
The access protocol LDAPv3 mandates UTF-8 encoding for Unicode strings on the
wire if attribute syntax is DirectoryString, IA5String (mainly ASCII) or
similar.
So if you're LDIF input returns UTF-16 encoded attribute values for e.g.
attribute 'cn' or 'o' or another attribute not being of OctetString or Binary
syntax something's wrong with the producer of the LDIF data.
Is there a process for manipulating/adding data to the entry dict before I
write it out that I
should adhere to? For example, if I am adding a new attribute to be composed
of part of
another parsed attr for use in a modlist:
{'customAttr': ['foo.{}.bar'.format(entry['uid'])]}
By looking at the value from above, 'det\3310wbb\pg', I gather the entry dict
was parsed
into byte strings. I should have decoded this, where as some of the data is
Unicode and
as such I should have encoded it?
I wonder what the string really is. At least the base64-encoding you provided
before decodes as UTF-8 but I'm not sure whether it's the right sequence of
Unicode code points you're expecting.
'ZGV0XDMzMTB3YmJccGc='.decode('base64').decode('utf-8')
u'det\\3310wbb\\pg'
I still can't figure out what you're really doing though. I'd recommend to
strip down your operations to a very simple test code snippet illustrating the
issue and post that here.
Ciao, Michael.
--
http://mail.python.org/mailman/listinfo/python-list
RE: Cutting a deck of cards
From: usenetm...@solar-empire.de [...] Not in Python3.x decks = 6 list(range(13 * 4 * decks)) == range(13 * 4 * decks) False Adiaŭ Marc What does list(range(13 * 4 * decks)) returns in Python 3? -- http://mail.python.org/mailman/listinfo/python-list
I want to know how to implement concurrent threads in Python
I want to know how to implement concurrent threads in Python -- http://mail.python.org/mailman/listinfo/python-list
Re: Short-circuit Logic
On 5/26/2013 7:11 AM, Ahmed Abdulshafy wrote: if not allow_zero and abs(x) sys.float_info.epsilon: print(zero is not allowed) The reason for the order is to do the easy calculation first and the harder one only if the first passes. -- http://mail.python.org/mailman/listinfo/python-list
Re: Cutting a deck of cards
Carlos Nepomuceno carlosnepomuc...@outlook.com wrote: From: usenetm...@solar-empire.de [...] Not in Python3.x decks = 6 list(range(13 * 4 * decks)) == range(13 * 4 * decks) False What does list(range(13 * 4 * decks)) returns in Python 3? A list of course. But Py3 range is very similar to Py2 xrange, it returns a range object. Adiaŭ Marc -- http://mail.python.org/mailman/listinfo/python-list
Re: Short-circuit Logic
In article mailman.2196.1369599562.3114.python-l...@python.org, Terry Jan Reedy tjre...@udel.edu wrote: On 5/26/2013 7:11 AM, Ahmed Abdulshafy wrote: if not allow_zero and abs(x) sys.float_info.epsilon: print(zero is not allowed) The reason for the order is to do the easy calculation first and the harder one only if the first passes. This is a particularly egregious case of premature optimization. You're worried about how long it takes to execute abs(x)? That's silly. -- http://mail.python.org/mailman/listinfo/python-list
Re: serialize a class to XML and back
On May 23, 2013 3:42 AM, Schneider j...@globe.de wrote: Hi list, how can I serialize a python class to XML? Plus a way to get the class back from the XML? There's pyxser: http://pythonhosted.org/pyxser/ My aim is to store instances of this class in a database. Honestly, I would avoid XML if you can. Consider using JSON (Python includes the `json` module in the std lib) or pickle instead. Compared to XML: The former is more standardized (in the context of serializing objects) and less verbose; the latter is more efficient (if you don't care about cross-language accessibility); both have more convenient APIs. Cheers, Chris -- http://mail.python.org/mailman/listinfo/python-list
Re: Output from to_bytes
On 5/26/2013 8:02 AM, Mok-Kong Shen wrote: for k in range(8,12,1): print(k.to_bytes(2,byteorder='big')) http://bugs.python.org/issue9951 http://bugs.python.org/issue3532 import binascii as ba for k in range(8,12,1): print(ba.hexlify(k.to_bytes(2,byteorder='big'))) b'0008' b'0009' b'000a' b'000b' -- http://mail.python.org/mailman/listinfo/python-list
Re: serialize a class to XML and back
In article mailman.2197.1369600623.3114.python-l...@python.org, Chris Rebert c...@rebertia.com wrote: On May 23, 2013 3:42 AM, Schneider j...@globe.de wrote: Hi list, how can I serialize a python class to XML? Plus a way to get the class back from the XML? There's pyxser: http://pythonhosted.org/pyxser/ My aim is to store instances of this class in a database. Honestly, I would avoid XML if you can. Consider using JSON (Python includes the `json` module in the std lib) or pickle instead. Compared to XML: The former is more standardized (in the context of serializing objects) and less verbose; the latter is more efficient (if you don't care about cross-language accessibility); both have more convenient APIs. Some other points... If you care about efficiency and want to use json, don't use the one that comes packaged with the standard library. There are lots of third-party json packages (ujson is the one we use) which are significantly faster. Not sure if that's true of the newest python releases, but it was certainly true in 2.6. The advantage of pickle over json is that pickle can serialize many types of objects that json can't. The other side of the coin is that pickle is python-specific, so if you think you'll ever need to read your data from other languages, pickle is right out. -- http://mail.python.org/mailman/listinfo/python-list
Re: Encodign issue in Python 3.3.1 (once again)
On 5/26/2013 12:36 PM, Νίκος Γκρ33κ wrote:
This is the code that although correct becaus it works with englisg(standARD
ASCII letters) it wont with Greek:
if( log ):
name = log
# print specific client header info
cur.execute('''SELECT hits, money FROM clients WHERE name = %s''',
(name,) )
data = cur.fetchone()
===
The following is the live output of: tail -F /usr/local/apache/logs/error_log
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] Error in
sys.excepthook:, referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] UnicodeEncodeError:
'ascii' codec can't encode characters in position 2050-2056: ordinal not in
range(128), referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] , referer:
http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] Original exception
was:, referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] Traceback (most recent
call last):, referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] File pelatologio.py, line
122, in module, referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11]
cur.execute('''SELECT hits, money FROM clients WHERE name = %s''', (name,) ),
referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] File
/opt/python3/lib/python3.3/site-packages/pymysql/cursors.py, line 108, in
execute, referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] query =
query.encode(charset), referer: http://superhost.gr/cgi-bin/pelatologio.py
[Sun May 26 19:24:04 2013] [error] [client 46.12.46.11] UnicodeEncodeError:
'latin-1' codec can't encode characters in position 46-52: ordinal not in
range(256), referer: http://superhost.gr/cgi-bin/pelatologio.py
This appears to be an issue with your mysql database and how you set it
up.. It is using charset='latin-1' whereas you need it to consistently
use charset='utf8' both for storing strings and for retrieval. Check the
mysql manual or ask on a mysql list for how to do that. I have no idea
so don't ask me, or send mail to my emall address.
--
http://mail.python.org/mailman/listinfo/python-list
Re: This mail never gets delivered. Any ideas why?
I'am receiving this now after some tries:
A problem occurred in a Python script. Here is the sequence of function calls
leading up to the error, in the order they occurred.
/home/nikos/public_html/cgi-bin/metrites.py in ()
139 else:
140 sp = subprocess.Popen(['mail', '-f', FROM, '-s', 'Mail
from Guest', 'supp...@superhost.gr'], stdin=subprocess.PIPE)
= 141 sp.communicate( MESSAGE )
142 status = sp.wait()
143 if status:
sp = subprocess.Popen object, sp.communicate = bound method
Popen.communicate of subprocess.Popen object, MESSAGE =
'kdsjfksdjkfjksdjfs\r\n\t'
/opt/python3/lib/python3.3/subprocess.py in communicate(self=subprocess.Popen
object, input='kdsjfksdjkfjksdjfs\r\n\t', timeout=None)
901 if input:
902 try:
= 903 self.stdin.write(input)
904 except IOError as e:
905 if e.errno != errno.EPIPE and e.errno !=
errno.EINVAL:
self = subprocess.Popen object, self.stdin = _io.BufferedWriter name=5,
self.stdin.write = built-in method write of _io.BufferedWriter object, input
= 'kdsjfksdjkfjksdjfs\r\n\t'
TypeError: 'str' does not support the buffer interface
args = ('str' does not support the buffer interface,)
with_traceback = built-in method with_traceback of TypeError object
--
http://mail.python.org/mailman/listinfo/python-list
Re: Future standard GUI library
On 26/05/13 20:41, Michael Torrie wrote: On 05/26/2013 11:43 AM, Wolfgang Keller wrote: snip Maybe it would have been faster to develop, but ultimately less useful and require more development time in the long run. suppose I now want the app natively on my phone (because that's all the rage). It's an iPhone. Oh. Apple doesn't support Python. Okay, rewrite the works, including business logic, in Objective C. Now I want it on my android phone. Oops rewrite the stack again in Java. Kivy (http://kivy.org) is a python library that can be used to write python apps for Linux, Windows, MaxOSX, Android and IOS. Regards, Ian F -- http://mail.python.org/mailman/listinfo/python-list
Re: Cutting a deck of cards
On 5/26/2013 3:54 PM, Carlos Nepomuceno wrote: From: usenetm...@solar-empire.de [...] Not in Python3.x decks = 6 list(range(13 * 4 * decks)) == range(13 * 4 * decks) False Adiaŭ Marc What does list(range(13 * 4 * decks)) returns in Python 3? A list, obviously. What you should ask is what range returns in Python 3, and you should install python 3 and try it, and list its attributes. -- http://mail.python.org/mailman/listinfo/python-list
Re: Piping processes works with 'shell = True' but not otherwise.
On May 24, 2013 7:06 AM, Luca Cerone luca.cer...@gmail.com wrote:
Hi everybody,
I am new to the group (and relatively new to Python)
so I am sorry if this issues has been discussed (although searching for
topics in the group I couldn't find a solution to my problem).
I am using Python 2.7.3 to analyse the output of two 3rd parties programs
that can be launched in a linux shell as:
program1 | program2
To do this I have written a function that pipes program1 and program2
(using subprocess.Popen) and the stdout of the subprocess, and a function
that parses the output:
A basic example:
from subprocess import Popen, STDOUT, PIPE
def run():
p1 = Popen(['program1'], stdout = PIPE, stderr = STDOUT)
p2 = Popen(['program2'], stdin = p1.stdout, stdout = PIPE, stderr =
STDOUT)
Could you provide the *actual* commands you're using, rather than the
generic program1 and program2 placeholders? It's *very* common for
people to get the tokenization of a command line wrong (see the Note box in
http://docs.python.org/2/library/subprocess.html#subprocess.Popen for some
relevant advice).
p1.stdout.close()
return p2.stdout
def parse(out):
for row in out:
print row
#do something else with each line
out.close()
return parsed_output
# main block here
pout = run()
parsed = parse(pout)
#--- END OF PROGRAM #
I want to parse the output of 'program1 | program2' line by line because
the output is very large.
When running the code above, occasionally some error occurs (IOERROR:
[Errno 0]).
Could you provide the full complete error message and exception traceback?
However this error doesn't occur if I code the run() function as:
def run():
p = Popen('program1 | program2', shell = True, stderr = STDOUT, stdout
= PIPE)
return p.stdout
I really can't understand why the first version causes errors, while the
second one doesn't.
Can you please help me understanding what's the difference between the
two cases?
One obvious difference between the 2 approaches is that the shell doesn't
redirect the stderr streams of the programs, whereas you /are/ redirecting
the stderrs to stdout in the non-shell version of your code. But this is
unlikely to be causing the error you're currently seeing.
You may also want to provide /dev/null as p1's stdin, out of an abundance
of caution.
Lastly, you may want to consider using a wrapper library such as
http://plumbum.readthedocs.org/en/latest/ , which makes it easier to do
pipelining and other such fancy things with subprocesses, while still
avoiding the many perils of the shell.
Cheers,
Chris
--
Be patient; it's Memorial Day weekend.
--
http://mail.python.org/mailman/listinfo/python-list
Re: I want to know how to implement concurrent threads in Python
On 2013.05.26 14:10, Daniel Gagliardi wrote: I want to know how to implement concurrent threads in Python With the threading module in the standard library. http://docs.python.org/3.3/library/threading.html There are plenty of tutorials on this out there; we'll be happy to help if you're stuck on something specific. -- CPython 3.3.2 | Windows NT 6.2.9200 / FreeBSD 9.1 -- http://mail.python.org/mailman/listinfo/python-list
Re: Future standard GUI library
On 05/26/2013 01:45 PM, Roy Smith wrote: In article mailman.2193.1369597318.3114.python-l...@python.org, Michael Torrie torr...@gmail.com wrote: On good thing web development has brought us is the knowledge that modularization and layers are a brilliant idea. Modularization and layers were a brilliant idea long before the web came around. True. Though it seems like it fell out of fashion for a long time. I went to school before the advent of web development and though we talked about modularization and coupling in software engineering, really it was all rather monolithic. Web development changed our focus back to where it should have been all along. -- http://mail.python.org/mailman/listinfo/python-list
Re: I want to know how to implement concurrent threads in Python
On 2013.05.26 16:21, Daniel Gagliardi wrote: shutup bitch! i do know python cannot concurrent threads. want a workaround You're a charming fellow. I'm sure everyone will flock to help you. -- http://mail.python.org/mailman/listinfo/python-list
Re: Short-circuit Logic
On 5/26/2013 4:22 PM, Roy Smith wrote: In article mailman.2196.1369599562.3114.python-l...@python.org, Terry Jan Reedy tjre...@udel.edu wrote: On 5/26/2013 7:11 AM, Ahmed Abdulshafy wrote: if not allow_zero and abs(x) sys.float_info.epsilon: print(zero is not allowed) The reason for the order is to do the easy calculation first and the harder one only if the first passes. This is a particularly egregious case of premature optimization. You're worried about how long it takes to execute abs(x)? That's silly. This is a particularly egregious case of premature response. You're ignoring an extra name lookup and two extra attribute lookups. That's silly. That's beside the fact that one *must* choose, so any difference is a reason to act rather than being frozen like Buridan's ass. http://en.wikipedia.org/wiki/Buridan%27s_ass If you wish, replace 'The reason' with 'A reason'. I also the logical flow as better with the order given. -- http://mail.python.org/mailman/listinfo/python-list
Re: Encodign issue in Python 3.3.1 (once again)
No thi is not a mysql issue becaus ei have this line above for storing and retrieval form database. con = pymysql.connect( db = 'metrites', host = 'localhost', user = 'me', passwd = 'somepass', init_command='SET NAMES UTF8' ) -- http://mail.python.org/mailman/listinfo/python-list
Re: Encodign issue in Python 3.3.1 (once again)
On Mon, May 27, 2013 at 7:26 AM, Νίκος Γκρ33κ nikos.gr...@gmail.com wrote: No thi is not a mysql issue becaus ei have this line above for storing and retrieval form database. con = pymysql.connect( db = 'metrites', host = 'localhost', user = 'me', passwd = 'somepass', init_command='SET NAMES UTF8' ) Research MySQL and UTF-8, then see how your command is actually flawed. Then research ESR and asking questions the smart way, and see how your post is also flawed. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Future standard GUI library
On Mon, May 27, 2013 at 5:41 AM, Michael Torrie torr...@gmail.com wrote: Chuckle. Simple CRUD, eh. Almost all apps involve database CRUD interactions. And often in highly complex ways using business logic. Right. Sturgeon's Law of Applications. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Solving the problem of mutual recursion
On Mon, May 27, 2013 at 5:35 AM, Ian Kelly ian.g.ke...@gmail.com wrote: I'm pretty sure that CPython uses the GIL regardless of platform. And yes you can have multiple OS-level threads, but because of the GIL only one will actually be running at a time. Other possibilities include: 6) It's spinning in a function that has released the GIL. Python threads can certainly execute concurrently; they just can't be manipulating Python objects. Most of the I/O functions will release the GIL before doing a potentially-blocking operation, and some CPU-heavy functions can do the same (I'm given to understand that numpy does this) - just depends on having a long job that involves no refcounted objects. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Cutting a deck of cards
On 26/05/2013 19:16, Carlos Nepomuceno wrote: Date: Sun, 26 May 2013 10:52:14 -0700 Subject: Cutting a deck of cards From: rvinc...@gmail.com To: python-list@python.org Suppose I have a deck of cards, and I shuffle them import random cards = [] decks = 6 cards = list(range(13 * 4 * decks)) random.shuffle(cards) So now I have an array of cards. I would like to cut these cards at some random point (between 1 and 13 * 4 * decks - 1, moving the lower half of that to the top half of the cards array. For some reason, I can't see how this can be done (I know that it must be a simple line or two in Python, but I am really stuck here). Anyone have any direction they can give me on this? Thanks, RVic, python newbie -- http://mail.python.org/mailman/listinfo/python-list list(range(13 * 4 * decks)) == range(13 * 4 * decks) ;) Wrong if you're using Python 3 :( -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Re: I want to know how to implement concurrent threads in Python
On 26/05/2013 22:27, Andrew Berg wrote: On 2013.05.26 16:21, Daniel Gagliardi wrote: shutup bitch! i do know python cannot concurrent threads. want a workaround You're a charming fellow. I'm sure everyone will flock to help you. So How to win friends and influence people had two authors. -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Re: Encodign issue in Python 3.3.1 (once again)
On 26/05/2013 22:26, Νίκος Γκρ33κ wrote: No thi is not a mysql issue becaus ei have this line above for storing and retrieval form database. con = pymysql.connect( db = 'metrites', host = 'localhost', user = 'me', passwd = 'somepass', init_command='SET NAMES UTF8' ) No wonder the Greek economy is so screwed up. -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
RE: Encodign issue in Python 3.3.1 (once again)
To: python-list@python.org From: breamore...@yahoo.co.uk [...] No wonder the Greek economy is so screwed up. -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence LOL LOL LOL LOL LOL LOL HAHAHAHAHA -- http://mail.python.org/mailman/listinfo/python-list
Re: I want to know how to implement concurrent threads in Python
On 26/05/2013 20:10, Daniel Gagliardi wrote: I want to know how to implement concurrent threads in Python google, bing, duckduckgo, yahoo... -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
RE: Cutting a deck of cards
To: python-list@python.org From: breamore...@yahoo.co.uk [...] Wrong if you're using Python 3 :( -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence Thanks guys! I've been delaying my dive into Python 3 (because I don't need it for now) but I'd like to run some code just to learn how different it is from Python 2 and even other Python flavors. So, I'd like to know if it's possible to have multiple Python installations on the same machine (Windows 7 in my particular case) without messing one with each other. What care must I take not to mess up with them? I've just found this[1] awesome service, but ridiculously it's PHP powered!!! lol Come on!!! Why there aren't more Python powered websites available? What's the catch? [1] http://www.compileonline.com/execute_python3_online.php -- http://mail.python.org/mailman/listinfo/python-list
Re: Cutting a deck of cards
On Mon, May 27, 2013 at 8:30 AM, Carlos Nepomuceno carlosnepomuc...@outlook.com wrote: Thanks guys! I've been delaying my dive into Python 3 (because I don't need it for now) but I'd like to run some code just to learn how different it is from Python 2 and even other Python flavors. So, I'd like to know if it's possible to have multiple Python installations on the same machine (Windows 7 in my particular case) without messing one with each other. What care must I take not to mess up with them? Easy. Just grab the standard installer and hit it. You'll get two separate directories (or more; I have \Python26, \Python27, \Python32, \Python33 on this box), and you can run whichever you want. The one thing to take care of is .py associations; I haven't actually done it (on here, all I actually do is IDLE, pretty much), but as of 3.3, you should be able to use a Unix-style shebang to indicate which Python you want to invoke. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Encodign issue in Python 3.3.1 (once again)
On Mon, May 27, 2013 at 8:21 AM, Mark Lawrence breamore...@yahoo.co.uk wrote: On 26/05/2013 22:26, Νίκος Γκρ33κ wrote: No thi is not a mysql issue becaus ei have this line above for storing and retrieval form database. con = pymysql.connect( db = 'metrites', host = 'localhost', user = 'me', passwd = 'somepass', init_command='SET NAMES UTF8' ) No wonder the Greek economy is so screwed up. Do you think the Greek economy would be improved by Python coming with PostgreSQL bindings? That'd push a lot of people onto a better database engine than MySQL. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: serialize a class to XML and back
On 26-5-2013 22:48, Roy Smith wrote: The advantage of pickle over json is that pickle can serialize many types of objects that json can't. The other side of the coin is that pickle is python-specific, so if you think you'll ever need to read your data from other languages, pickle is right out. That is not entirely true :) I've written a pickle implementation for Java and .NET that is almost feature complete; it is part of http://pythonhosted.org/Pyro4/pyrolite.html Still, pickle may not be the best choice here. Cheers Irmen -- http://mail.python.org/mailman/listinfo/python-list
Re: Encodign issue in Python 3.3.1 (once again)
On 26/05/2013 23:32, Chris Angelico wrote: On Mon, May 27, 2013 at 8:21 AM, Mark Lawrence breamore...@yahoo.co.uk wrote: On 26/05/2013 22:26, Νίκος Γκρ33κ wrote: No thi is not a mysql issue becaus ei have this line above for storing and retrieval form database. con = pymysql.connect( db = 'metrites', host = 'localhost', user = 'me', passwd = 'somepass', init_command='SET NAMES UTF8' ) No wonder the Greek economy is so screwed up. Do you think the Greek economy would be improved by Python coming with PostgreSQL bindings? That'd push a lot of people onto a better database engine than MySQL. ChrisA Even the best economies would be improved by Python coming with PostgreSQL bindings, but if and only if the user knew how to use them :) -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
RE: Cutting a deck of cards
Date: Mon, 27 May 2013 08:42:56 +1000 Subject: Re: Cutting a deck of cards From: ros...@gmail.com [...] Easy. Just grab the standard installer and hit it. You'll get two separate directories (or more; I have \Python26, \Python27, \Python32, \Python33 on this box), and you can run whichever you want. The one thing to take care of is .py associations; I haven't actually done it (on here, all I actually do is IDLE, pretty much), but as of 3.3, you should be able to use a Unix-style shebang to indicate which Python you want to invoke. ChrisA I'm not even using shebangs in Windows because I thought it wouldn't make any difference. I'm used to run scripts like python filename.py from the command line. No problem! So, Python 3.3 will honor if I insert #!C:\Python27\python.exe? if I install it after Python 2.7? Cool!!! -- http://mail.python.org/mailman/listinfo/python-list
Re: Cutting a deck of cards
On 26/05/2013 23:42, Chris Angelico wrote: On Mon, May 27, 2013 at 8:30 AM, Carlos Nepomuceno carlosnepomuc...@outlook.com wrote: Thanks guys! I've been delaying my dive into Python 3 (because I don't need it for now) but I'd like to run some code just to learn how different it is from Python 2 and even other Python flavors. So, I'd like to know if it's possible to have multiple Python installations on the same machine (Windows 7 in my particular case) without messing one with each other. What care must I take not to mess up with them? Easy. Just grab the standard installer and hit it. You'll get two separate directories (or more; I have \Python26, \Python27, \Python32, \Python33 on this box), and you can run whichever you want. The one thing to take care of is .py associations; I haven't actually done it (on here, all I actually do is IDLE, pretty much), but as of 3.3, you should be able to use a Unix-style shebang to indicate which Python you want to invoke. ChrisA See this http://docs.python.org/3/whatsnew/3.3.html#pep-397-python-launcher-for-windows -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Python error codes and messages location
Where can I find all error codes and messages that Python throws (actual codes and messages from exceptions raised by stdlib)? I've already found the module 'errno' and got a dictionary (errno.errorcode) and some system error messages (os.strerror(errno.ENAMETOOLONG)) but there's more I couldn't find. -- http://mail.python.org/mailman/listinfo/python-list
Re: Piping processes works with 'shell = True' but not otherwise.
Could you provide the *actual* commands you're using, rather than the generic program1 and program2 placeholders? It's *very* common for people to get the tokenization of a command line wrong (see the Note box in http://docs.python.org/2/library/subprocess.html#subprocess.Popen for some relevant advice). Hi Chris, first of all thanks for the help. Unfortunately I can't provide the actual commands because are tools that are not publicly available. I think I get the tokenization right, though.. the problem is not that the programs don't run.. it is just that sometimes I get that error.. Just to be clear I run the process like: p = subprocess.Popen(['program1','--opt1','val1',...'--optn','valn'], ... the rest) which I think is the right way to pass arguments (it works fine for other commands).. Could you provide the full complete error message and exception traceback? yes, as soon as I get to my work laptop.. One obvious difference between the 2 approaches is that the shell doesn't redirect the stderr streams of the programs, whereas you /are/ redirecting the stderrs to stdout in the non-shell version of your code. But this is unlikely to be causing the error you're currently seeing. You may also want to provide /dev/null as p1's stdin, out of an abundance of caution. I tried to redirect the output to /dev/null using the Popen argument: 'stdin = os.path.devnull' (having imported os of course).. But this seemed to cause even more troubles... Lastly, you may want to consider using a wrapper library such as http://plumbum.readthedocs.org/en/latest/ , which makes it easier to do pipelining and other such fancy things with subprocesses, while still avoiding the many perils of the shell. Thanks, I didn't know this library, I'll give it a try. Though I forgot to mention that I was using the subprocess module, because I want the code to be portable (even though for now if it works in Unix platform is OK). Thanks a lot for your help, Cheers, Luca -- http://mail.python.org/mailman/listinfo/python-list
RE: Piping processes works with 'shell = True' but not otherwise.
pipes usually consumes disk storage at '/tmp'. Are you sure you have enough room on that filesystem? Make sure no other processes are competing against for that space. Just my 50c because I don't know what's causing Errno 0. I don't even know what are the possible causes of such error. Good luck! Date: Sun, 26 May 2013 16:58:57 -0700 Subject: Re: Piping processes works with 'shell = True' but not otherwise. From: luca.cer...@gmail.com To: python-list@python.org [...] I tried to redirect the output to /dev/null using the Popen argument: 'stdin = os.path.devnull' (having imported os of course).. But this seemed to cause even more troubles... Lastly, you may want to consider using a wrapper library such as http://plumbum.readthedocs.org/en/latest/ , which makes it easier to do pipelining and other such fancy things with subprocesses, while still avoiding the many perils of the shell. Thanks, I didn't know this library, I'll give it a try. Though I forgot to mention that I was using the subprocess module, because I want the code to be portable (even though for now if it works in Unix platform is OK). Thanks a lot for your help, Cheers, Luca -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: This mail never gets delivered. Any ideas why?
On 26May2013 13:48, =?utf-8?B?zp3Or866zr/PgiDOk866z4EzM866?=
nikos.gr...@gmail.com wrote:
| I'am receiving this now after some tries:
|
| A problem occurred in a Python script. Here is the sequence of function calls
leading up to the error, in the order they occurred.
|
| /home/nikos/public_html/cgi-bin/metrites.py in ()
| 139 else:
| 140 sp = subprocess.Popen(['mail', '-f', FROM, '-s',
'Mail from Guest', 'supp...@superhost.gr'], stdin=subprocess.PIPE)
| = 141 sp.communicate( MESSAGE )
| 142 status = sp.wait()
| 143 if status:
| sp = subprocess.Popen object, sp.communicate = bound method
Popen.communicate of subprocess.Popen object, MESSAGE =
'kdsjfksdjkfjksdjfs\r\n\t'
| /opt/python3/lib/python3.3/subprocess.py in
communicate(self=subprocess.Popen object, input='kdsjfksdjkfjksdjfs\r\n\t',
timeout=None)
| 901 if input:
| 902 try:
| = 903 self.stdin.write(input)
Well, you should probably be writing to sp.stdin, not sys.stdin.
| 904 except IOError as e:
| 905 if e.errno != errno.EPIPE and e.errno !=
errno.EINVAL:
| self = subprocess.Popen object, self.stdin = _io.BufferedWriter name=5,
self.stdin.write = built-in method write of _io.BufferedWriter object, input
= 'kdsjfksdjkfjksdjfs\r\n\t'
| TypeError: 'str' does not support the buffer interface
| args = ('str' does not support the buffer interface,)
| with_traceback = built-in method with_traceback of TypeError object
This is symptomatic of sys.stdin (well, whatever you're writing to)
being open in binary mode instead of text mode. And you're passing
a str. Try passing std.encode().
Cheers,
--
Cameron Simpson c...@zip.com.au
Yes, [congress is] petty and venal and selfish. That's why they're called
_representatives_. - Will Durst
--
http://mail.python.org/mailman/listinfo/python-list
Re: This mail never gets delivered. Any ideas why?
On 27May2013 10:22, I wrote:
| | = 903 self.stdin.write(input)
[...]
| | self = subprocess.Popen object, self.stdin = _io.BufferedWriter name=5,
self.stdin.write = built-in method write of _io.BufferedWriter object, input
= 'kdsjfksdjkfjksdjfs\r\n\t'
| | TypeError: 'str' does not support the buffer interface
| | args = ('str' does not support the buffer interface,)
| | with_traceback = built-in method with_traceback of TypeError object
|
| This is symptomatic of sys.stdin (well, whatever you're writing to)
| being open in binary mode instead of text mode. And you're passing
| a str. Try passing std.encode().
Sorry, that should be input.encode().
--
Cameron Simpson c...@zip.com.au
PCs are like a submarine, it will work fine till you open Windows. - zollie101
--
http://mail.python.org/mailman/listinfo/python-list
Re: TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'
On 26May2013 17:45, Mark Lawrence breamore...@yahoo.co.uk wrote: | On 26/05/2013 17:10, Νίκος Γκρ33κ wrote: | Here is the live error log coming form apacher when i request the webpage form browser: | | == /usr/local/apache/logs/error_log == | [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] suexec failure: could not open log file | [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] fopen: Permission denied | [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] fopen: Permission denied | [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] Premature end of script headers: koukos.py | [Sun May 26 19:07:41 2013] [error] [client 46.12.46.11] Premature end of script headers: koukos.py | | what is that suexec? | | What has this got to do with Python? Little, and I've already explained what suexec is to him some weeks ago, off list. Cheers, -- Cameron Simpson c...@zip.com.au The road less traveled is FASTER !! - Luc Marcouiller, marco...@ireq.hydro.qc.ca -- http://mail.python.org/mailman/listinfo/python-list
Re: serialize a class to XML and back
In article 51a28f42$0$15870$e4fe5...@news.xs4all.nl, Irmen de Jong irmen.nos...@xs4all.nl wrote: On 26-5-2013 22:48, Roy Smith wrote: The advantage of pickle over json is that pickle can serialize many types of objects that json can't. The other side of the coin is that pickle is python-specific, so if you think you'll ever need to read your data from other languages, pickle is right out. That is not entirely true :) I've written a pickle implementation for Java and .NET that is almost feature complete; it is part of http://pythonhosted.org/Pyro4/pyrolite.html Very cool Still, pickle may not be the best choice here. Perhaps not, but lots of points for the awesomeness factor. -- http://mail.python.org/mailman/listinfo/python-list
Re: Short-circuit Logic
On Sun, 26 May 2013 16:22:26 -0400, Roy Smith wrote: In article mailman.2196.1369599562.3114.python-l...@python.org, Terry Jan Reedy tjre...@udel.edu wrote: On 5/26/2013 7:11 AM, Ahmed Abdulshafy wrote: if not allow_zero and abs(x) sys.float_info.epsilon: print(zero is not allowed) The reason for the order is to do the easy calculation first and the harder one only if the first passes. This is a particularly egregious case of premature optimization. You're worried about how long it takes to execute abs(x)? That's silly. I don't think it's a matter of premature optimization so much as the general principle run code only if it needs to run. Hence, first you check the flag to decide whether or not you care whether x is near zero, and *only if you care* do you then check whether x is near zero. # This is silly: if x is near zero: if we care: handle near zero condition() # This is better: if we care: if x is near zero handle near zero condition() Not only is this easier to understand because it matches how we do things in the real life, but it has the benefit that if the near zero condition ever changes to become much more expensive, you don't have to worry about reordering the tests because they're already in the right order. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Python error codes and messages location
On Mon, 27 May 2013 02:13:54 +0300, Carlos Nepomuceno wrote: Where can I find all error codes and messages that Python throws (actual codes and messages from exceptions raised by stdlib)? There is no list. It is subject to change from version to version, including point releases. Many functions and methods document which exceptions they can be expected to raise, or at least the *usual* exceptions, but many more do not. And the error messages themselves are implementation details and are subject to change without notice, even if the exception type is a documented part of the API. You can see a full list of built-in exception types in the docs: http://docs.python.org/3/library/exceptions.html but of course since they are classes, they can be subclassed, and in principle a function that raises (say) ValueError might sometimes raise a subclass of ValueError without documenting it. So the actual answer to your question is: Read the source code. Sorry :-( I've already found the module 'errno' and got a dictionary (errno.errorcode) and some system error messages (os.strerror(errno.ENAMETOOLONG)) but there's more I couldn't find. These are the standard C operating system and file system error codes, not Python exceptions. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
