date:20130304

On Mon, 04 Mar 2013 01:37:42 -0800, yomnasalah91 wrote:

 I have a problem with encoding in python 27 shell.
 
 when i write this in the python shell:
 
 w=u'العربى'
 
 It gives me the following error:
 
 Unsupported characters in input
 
 any help?

Firstly, please show the COMPLETE error, including the full traceback. 
Python errors look like (for example):

py x = ord(100)
Traceback (most recent call last):
  File stdin, line 1, in module
TypeError: ord() expected string of length 1, but int found


Copy and paste the complete traceback.


Secondly, please describe your environment:

- What operating system and version are you using? Linux, Windows, Mac 
OS, something else? Which version or distro?

- Which console or terminal application? E.g. cmd.exe (Windows), konsole, 
xterm, something else?

- Which shell? E.g. the standard Python interpreter, IDLE, bpython, 
something else?


My guess is that this is not a Python problem, but an issue with your 
console. You should always have your console set to use UTF-8, if 
possible. I expect that your console is set to use a different encoding. 
In that case, see if you can change it to UTF-8. For example, using Gnome 
Terminal on Linux, I can do this:


py w = u'العربى'
py print w
العربى

and it works fine, but if I change the encoding to WINDOWS-1252 using the 
Set character encoding menu command, the terminal will not allow me to 
paste the string into the terminal. 



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Re: Triple nested loop python (While loop insde of for loop inside of while loop)

2013-03-04 Thread Ulrich Eckhardt


Am 01.03.2013 17:28, schrieb Isaac Won:

What I really want to get from this code is m1 as I told. For this
purpose, for instance, values of fpsd upto second loop and that from
third loop should be same, but they are not. Actually it is my main
question.


You are not helping yourself...



In any case, please drop everything not necessary to demostrate the
problem before posting. This makes it easier to see what is going
wrong both for you and others. Also make sure that others can
actually run the code.


Read this carefully, I didn't write that to fill up empty space. Also, 
read Eric S. Raymond's essay on asking smart questions (you can easily 
locate it online), which the problems with your question in a much more 
general way.



Uli


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Python SUDS issue

2013-03-04 Thread VGNU Linux

Hi Guys,
I am pretty new to web services.
After some googling found that python suds is a suitable module to create
web service client. I am trying to create a client but its giving me an
error which is quite confusing for me.

Here is my code:
from suds.client import Client
wsdlurl = 'https://46.51.221.138/PBExternalServices/v1/soap?wsdl'
client = Client(wsdlurl)
print client

And following is the error that occurs on trying to print client.
Traceback (most recent call last):
  File trysuds.py, line 3, in module
client = Client(wsdlurl)
  File C:\Python25\Lib\site-packages\suds\client.py, line 112, in __init__
self.wsdl = reader.open(url)
  File C:\Python25\Lib\site-packages\suds\reader.py, line 152, in open
d = self.fn(url, self.options)
  File C:\Python25\Lib\site-packages\suds\wsdl.py, line 159, in __init__
self.build_schema()
  File C:\Python25\Lib\site-packages\suds\wsdl.py, line 220, in
build_schema
self.schema = container.load(self.options)
  File C:\Python25\Lib\site-packages\suds\xsd\schema.py, line 95, in load
child.dereference()
  File C:\Python25\Lib\site-packages\suds\xsd\schema.py, line 323, in
dereference
midx, deps = x.dependencies()
  File C:\Python25\Lib\site-packages\suds\xsd\sxbasic.py, line 469, in
dependencies
raise TypeNotFound(self.ref)
suds.TypeNotFound: Type not found: '(GetAccountBalanceFaultResponse,
http://www.payback.net/lmsglobal/xsd/v1/types, )'

Appreciate your help.
Thanks in advance,
VGNU
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Question on for loop

2013-03-04 Thread newtopython

Hi all,

I'm super new to python, just fyi.

In the piece of code below, secretWord is a string and lettersGuessed is a 
list. I'm trying to find out if ALL the characters of secretWord are included 
in lettersGuessed, even if there are additional values in the lettersGuessed 
list that aren't in secretWord. 

What this code is doing is only checking the first character of secretWord and 
then returning True or False. How do I get it to iterate through ALL of the 
characters of secretWord?

for character in secretWord:
if character not in lettersGuessed:
return True
return False

Thanks!

Ro
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Re: Question on for loop

2013-03-04 Thread leo kirotawa

In fact this code is already doing what you want, but if the second
character, by example, is not in secrectWord it'll jump out of the for and
return. If you want that interact through the all characters and  maybe
count how many them are in the secrectWord, just take of the return there
or do some list comprehension like: [ r for r in secrecWord if r in
lettersGuessed] .



[]'s



On Mon, Mar 4, 2013 at 9:18 AM, newtopython roshen.set...@gmail.com wrote:

 Hi all,

 I'm super new to python, just fyi.

 In the piece of code below, secretWord is a string and lettersGuessed is a
 list. I'm trying to find out if ALL the characters of secretWord are
 included in lettersGuessed, even if there are additional values in the
 lettersGuessed list that aren't in secretWord.

 What this code is doing is only checking the first character of secretWord
 and then returning True or False. How do I get it to iterate through ALL of
 the characters of secretWord?

 for character in secretWord:
 if character not in lettersGuessed:
 return True
 return False

 Thanks!

 Ro
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Re: Question on for loop

2013-03-04 Thread Joel Goldstick

On Mon, Mar 4, 2013 at 7:18 AM, newtopython roshen.set...@gmail.com wrote:

 Hi all,

 I'm super new to python, just fyi.


Welcome.  Next time write a better subject line, and be sure the code you
post is actually the code you are running.  Provide the results you want
and what you get.  Provide the traceback if there is one


 In the piece of code below, secretWord is a string and lettersGuessed is a
 list. I'm trying to find out if ALL the characters of secretWord are
 included in lettersGuessed, even if there are additional values in the
 lettersGuessed list that aren't in secretWord.

 What this code is doing is only checking the first character of secretWord
 and then returning True or False. How do I get it to iterate through ALL of
 the characters of secretWord?

 for character in secretWord:
 if character not in lettersGuessed:


I am guessing that the next two lines are actually indented in your script
so I am changing them here


return True
 return False

 The first time your if block is checked it will return True or False.
Since you haven't shown this code in a function, as written it won't run at
all.

Your question makes no sense.  What would it mean to look through each
character and return True or False?  What would make the result True?  All
matches, some matches?

 Thanks!

 Ro
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Re: Python SUDS issue

2013-03-04 Thread Joel Goldstick

On Mon, Mar 4, 2013 at 5:37 AM, VGNU Linux vgnuli...@gmail.com wrote:

 Hi Guys,
 I am pretty new to web services.
 After some googling found that python suds is a suitable module to create
 web service client. I am trying to create a client but its giving me an
 error which is quite confusing for me.

 Here is my code:
 from suds.client import Client
 wsdlurl = 'https://46.51.221.138/PBExternalServices/v1/soap?wsdl'



What happens when you type this in your browser:
https://46.51.221.138/PBExternalServices/v1/soap?wsdl


 client = Client(wsdlurl)
 print client

 And following is the error that occurs on trying to print client.
 Traceback (most recent call last):
   File trysuds.py, line 3, in module
 client = Client(wsdlurl)
   File C:\Python25\Lib\site-packages\suds\client.py, line 112, in
 __init__
 self.wsdl = reader.open(url)
   File C:\Python25\Lib\site-packages\suds\reader.py, line 152, in open
 d = self.fn(url, self.options)
   File C:\Python25\Lib\site-packages\suds\wsdl.py, line 159, in __init__
 self.build_schema()
   File C:\Python25\Lib\site-packages\suds\wsdl.py, line 220, in
 build_schema
 self.schema = container.load(self.options)
   File C:\Python25\Lib\site-packages\suds\xsd\schema.py, line 95, in load
 child.dereference()
   File C:\Python25\Lib\site-packages\suds\xsd\schema.py, line 323, in
 dereference
 midx, deps = x.dependencies()
   File C:\Python25\Lib\site-packages\suds\xsd\sxbasic.py, line 469, in
 dependencies
 raise TypeNotFound(self.ref)
 suds.TypeNotFound: Type not found: '(GetAccountBalanceFaultResponse,
 http://www.payback.net/lmsglobal/xsd/v1/types, )'

 Appreciate your help.
 Thanks in advance,
 VGNU

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Re: Question on for loop

2013-03-04 Thread Dave Angel


On 03/04/2013 07:18 AM, newtopython wrote:

Hi all,

I'm super new to python, just fyi.


Welcome to the Python list.



In the piece of code below, secretWord is a string and lettersGuessed is a 
list. I'm trying to find out if ALL the characters of secretWord are included 
in lettersGuessed, even if there are additional values in the lettersGuessed 
list that aren't in secretWord.

What this code is doing is only checking the first character of secretWord and 
then returning True or False. How do I get it to iterate through ALL of the 
characters of secretWord?

for character in secretWord:
 if character not in lettersGuessed:
 return True
return False



Please post a complete sample when possible, and make sure you 
copy/paste it, not just retype it and hope.  As written, it'll throw an 
exception when return is encountered.  But before that, it'll complain 
about the indentation of the return True.


Perhaps you have something like:

def has_some_behavior(secretWord, lettersGuessed):
for character in secretWord:
if character not in lettersGuessed:
return True
return False

If so, please copy the whole thing from your code, and explain just how 
you call it (what arguments are passed), what it returned, and what's 
wrong with that behavior.



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Re: Encoding problem in python

2013-03-04 Thread Vlastimil Brom

2013/3/4  yomnasala...@gmail.com:
 I have a problem with encoding in python 27 shell.

 when i write this in the python shell:

 w=u'العربى'

 It gives me the following error:

 Unsupported characters in input

 any help?
 --
 http://mail.python.org/mailman/listinfo/python-list


Hi,
I guess, you are using the built-in IDLE shell with python 2.7 and
this is a specific limitation of its handling of some unicode
characters  (in some builds and OSes - narrow-unicode, Windows, most
likely?) and its specific error message - not the usual python
traceback mentioned in other posts).
If it is viable, using python 3.3 instead would solve this problem for IDLE:

Python 3.3.0 (v3.3.0:bd8afb90ebf2, Sep 29 2012, 10:55:48) [MSC v.1600
32 bit (Intel)] on win32
Type copyright, credits or license() for more information.
 w='العربى'
 w
'العربى'

(note the missing u in unicode literal before the starting quotation
mark, which would be the usual usage in python 3, but python 3.3 also
silently ignores u... for compatibility.)

 w=u'العربى'
 w
'العربى'


If python 2.7 is required, another shell is probably needed (unless I
am missing some option to make IDLE work for this input);
e.g. the following works in pyshell - part of the wxpython GUI library
http://www.wxpython.org/

 w=u'العربى'
 w
u'\u0627\u0644\u0639\u0631\u0628\u0649'
 print w
العربى


hth,
   vbr
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Different behavior with multiprocessing

2013-03-04 Thread Tomas Kotal

Hi all.

Recently I discovered a strange behavior with multiprocessing library and call 
to function os.system (a different behavior under Linux and Windows to be more 
specific). I have this simple testing script:


import sys
import os
from multiprocessing import Process

def do_fork(cmd):
ret = os.system(cmd)
# print result of call
print ret
os._exit(ret)

if __name__ == __main__:
cmds = [ dir, xy ]

procs = []
for cmd in cmds:
proc = Process(target=do_fork, args=(cmd, ))
proc.start()
procs.append( proc )

for proc in procs:
proc.join()
print exitcode: %d % proc.exitcode

print ok 


This script just starts 2 processes. Each process executes one command in 
system shell and exits setting it's exit code same as exit code of a system 
call. There are 2 commands: dir (which works fine on Windows and Linux) and 
xy (which is supposed to fail under both systems). The strange thing is that 
when I run this script under Windows I get this output:

0
1
exitcode: 0
exitcode: 1
ok

The first 0 and 1 are results of os.system call which are printed from child 
processes. Rest of lines are printed from main process. This is expected output.

But when I run same script on Linux, what I get is this:

0
32512
exitcode: 0
exitcode: 0
ok

Although the second command fails and returns exit code 32512, the exit code 
from process in parent process gives me 0. I tried to change the script to use 
fork() instead of Process but the result was same.

Can anybody explain me what's the problem here?

(I use Python 2.6 on both Windows and Linux machines)
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Re: Question on for loop

2013-03-04 Thread Bryan Devaney

 if character not in lettersGuessed:
 
 return True
 
 return False

assuming a function is being used to pass each letter of the letters guessed 
inside a loop itself that only continues checking if true is returned, then 
that could work.

It is however more work than is needed. 

If you made secretword a list,you could just 

set(secretword)set(lettersguessed) 

and check the result is equal to secretword.
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Re: Different behavior with multiprocessing

On Tue, Mar 5, 2013 at 1:31 AM, Tomas Kotal tomas.ko...@gmail.com wrote:
 But when I run same script on Linux, what I get is this:

 0
 32512

Under Unix, the return value from os.system() encodes more than one
piece of information:

http://docs.python.org/2/library/os.html#os.system
http://docs.python.org/2/library/os.html#os.wait

32512 is 127*256, meaning that the shell exited with return code 127
when given an unrecognized command.

ChrisA
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Re: i need help

2013-03-04 Thread Bryan Devaney

On Sunday, March 3, 2013 6:45:26 PM UTC, Kwpolska wrote:
 On Sun, Mar 3, 2013 at 7:46 AM, Michael Torrie torr...@gmail.com wrote:
 
  On 02/21/2013 03:18 AM, leonardo wrote:
 
  thanks, problem solved
 
 
 
  Apparently not.  The shift key on your keyboard still seems to be
 
  non-functional. ;)
 
  --
 
  http://mail.python.org/mailman/listinfo/python-list
 
 
 
 It is!  How else could he type those two question marks and 10 double-quotes?
 
 
 
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Onscreen Keyboard?
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Embedding a for inside an html template for substitution

2013-03-04 Thread Ferrous Cranus

Hello pythonistas!

I'am tryign to populate a table with dictionary keys and values:

Foe that iam using an html template and the questions is what i should write 
inside 'files.html' so then then the python script populate the table.

table
trthSuperHost - Economy/th/tr
trtdΧώρος στο δίσκο: 1 GB/td/tr
trtdΜηνιαία Κίνηση δεδομένων: 1 GB/td/tr
trtdControl Panel: cPanel 11  Fantastico Deluxe/td/tr
trtdDomains: 1/td/tr
trtdSubdomains: 1/td/tr
trtdFTP Accounts: 1/td/tr
trtdEmails (POP3): 2/td/tr
trtdWebMail: [ RoundCube|Horde|Squirrel ]: ΝΑΙ/td/tr
trtdMysql Databases: 2/td/tr
/table

Instead of writing the above html data inside my html template how would i 
write it with a for that then will be substituted by the python script?

can you please write an example for me that user files.html and gets 
populates by files.py ?

i want os ee how it lloks like please!

Thank you.
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fixed broken links for the latest pylint/astng release

2013-03-04 Thread Sylvain Thénault

Hi there,

last week I announced the latest and greatest pylint/astng release 
but didn't noticed at that time that the download links on our web site 
were broken, and that the upload to pypi failed.

This is now fixed, for those who tried during the mean time.

Sorry for the convenience,
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Re: Different behavior with multiprocessing

2013-03-04 Thread Tomas Kotal

 Under Unix, the return value from os.system() encodes more than one
 
 piece of information:
 
 
 
 http://docs.python.org/2/library/os.html#os.system
 
 http://docs.python.org/2/library/os.html#os.wait
 
 
 
 32512 is 127*256, meaning that the shell exited with return code 127
 
 when given an unrecognized command.
 
 
 
 ChrisA

Well the point is not the difference between return values of os.system under 
Windows and Linux.

The point is that I set the exist code of child process with os._exit() which 
works fine on Windows but on Linux the process.exitcode returns always 0.

What is very strange is, that if I set return code to some other value, like:

...
os._exit( len(cmd) )
...

Then I got exit codes 3 and 2 under Linux, which is correct. But when I do 
something like this:

...
ret = os.system(cmd)
print ret # this print real value, like 32512
os._exit(ret) # exitcode of this child process will be 0 on Linux
...

It doesn't work, which seems very strange to me.
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Re: Different behavior with multiprocessing

2013-03-04 Thread Tomas Kotal

Dne pondělí, 4. března 2013 15:31:41 UTC+1 Tomas Kotal napsal(a):
 Hi all.
 
 
 
 Recently I discovered a strange behavior with multiprocessing library and 
 call to function os.system (a different behavior under Linux and Windows to 
 be more specific). I have this simple testing script:
 
 
 
 
 
 import sys
 
 import os
 
 from multiprocessing import Process
 
 
 
 def do_fork(cmd):
 
 ret = os.system(cmd)
 
 # print result of call
 
 print ret
 
 os._exit(ret)
 
 
 
 if __name__ == __main__:
 
 cmds = [ dir, xy ]
 
 
 
 procs = []
 
 for cmd in cmds:
 
 proc = Process(target=do_fork, args=(cmd, ))
 
 proc.start()
 
 procs.append( proc )
 
 
 
 for proc in procs:
 
 proc.join()
 
 print exitcode: %d % proc.exitcode
 
 
 
 print ok 
 
 
 
 
 
 This script just starts 2 processes. Each process executes one command in 
 system shell and exits setting it's exit code same as exit code of a system 
 call. There are 2 commands: dir (which works fine on Windows and Linux) and 
 xy (which is supposed to fail under both systems). The strange thing is 
 that when I run this script under Windows I get this output:
 
 
 
 0
 
 1
 
 exitcode: 0
 
 exitcode: 1
 
 ok
 
 
 
 The first 0 and 1 are results of os.system call which are printed from child 
 processes. Rest of lines are printed from main process. This is expected 
 output.
 
 
 
 But when I run same script on Linux, what I get is this:
 
 
 
 0
 
 32512
 
 exitcode: 0
 
 exitcode: 0
 
 ok
 
 
 
 Although the second command fails and returns exit code 32512, the exit code 
 from process in parent process gives me 0. I tried to change the script to 
 use fork() instead of Process but the result was same.
 
 
 
 Can anybody explain me what's the problem here?
 
 
 
 (I use Python 2.6 on both Windows and Linux machines)

Seems like I found the problem: os._exit probably takes as parametr unsigned 
char, so it uses as error code whatever value it gets modulo 256:

os._exit(1)  # process.exitcode == 1
os._exit(255)  # process.exitcode == 255
os._exit(256)  # process.exitcode == 0
os._exit(257)  # process.exitcode == 1
os._exit(32512)  # process.exitcode == 0

So on Linux it's necesary to call something like this:
os._exit( os.system(cmd)  8 )

Because the first byte of return value on Linux is number of signal which kills 
the process and the second one is actual exit code.

http://docs.python.org/2/library/os.html#os.wait
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Re: Different behavior with multiprocessing

On Tue, Mar 5, 2013 at 2:35 AM, Tomas Kotal tomas.ko...@gmail.com wrote:
 Seems like I found the problem: os._exit probably takes as parametr unsigned 
 char, so it uses as error code whatever value it gets modulo 256:

 os._exit(1)  # process.exitcode == 1
 os._exit(255)  # process.exitcode == 255
 os._exit(256)  # process.exitcode == 0
 os._exit(257)  # process.exitcode == 1
 os._exit(32512)  # process.exitcode == 0

 So on Linux it's necesary to call something like this:
 os._exit( os.system(cmd)  8 )

 Because the first byte of return value on Linux is number of signal which 
 kills the process and the second one is actual exit code.

Yep. I had a reply part-written but you beat me to it! That is indeed
what you need if you want to chain return values.

However, why are you using os._exit? Check out the note here:

http://docs.python.org/2/library/os.html#os._exit

ChrisA
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Re: Question on for loop

2013-03-04 Thread Rick Johnson

On Monday, March 4, 2013 6:18:20 AM UTC-6, newtopython wrote:

[Note: Post has be logically re-arranged for your comprehensive pleasures]

 for character in secretWord:
 if character not in lettersGuessed:
 return True
 return False
 
 What this code is doing is only checking the first
 character of secretWord and then returning True or False.
 How do I get it to iterate through ALL of the characters
 of secretWord?

Your code is a fine example of:  attempting to solve too many problems at the 
same time. If you are having trouble understanding how to iterate over a 
sequence, then why would you complicate that learning experience by injecting 
other unsolved problems into the mix? First, solve the iteration problem. Then 
expand.

 ## START INTERACTIVE SESSION ##
 py s = 'multiplicity'
 py for char in s:
 ... print char 
 m
 u
 l
 t
 i
 p
 l
 i
 c
 i
 t
 y
 ## END INTERACTIVE SESSION ##

Now, we have a simple base from which to build! 

 In the piece of code [ABOVE], secretWord is a string and
 lettersGuessed is a list. I'm trying to find out if ALL
 the characters of secretWord are included in
 lettersGuessed, even if there are additional values in the
 lettersGuessed list that aren't in secretWord.

First, step away from your interpreter! Now, grab a pen and paper and write 
down the steps required to compare two sequences in real life.

1. Create a list of letters guessed and a string representing the secret 
word.

secretWord = 'multiplicity'
lettersGuessed = 'aeiouy'

2. For each letter in secretWord, look in lettersGuessed and see if you can 
find the letter, then make a note of your findings. If the letter is in IN both 
sequences, write [letter]=True, if not, write [letter]=False.

However, this algorithm is rather naive. What happens if one or both list 
contain the same letter numerous times (f.e. multiplicity has 3 i chars)? 
Do we want the user to provide a guess for all three i chars, or will just a 
single guess al la price is right will do the trick? 

Also, do we care about the char order? Or are we merely allowing the user to 
guess all the letters of the word in ANY order (that seems to be your intent 
here!)?

In any event i am not going to just gift wrap and answer for you. There are 
many methods of solving this problem, some are elegant, some or not elegant, 
some use built-in functions, some use list comprehensions, and some could just 
use a for loop and a single built-in function. I would highly suggest that you 
figure this out using the latter. Until you can achieve this, forget about list 
comprehension or any advanced stuff. 

But most importantly: Build your code in small incremental steps and solve ONE 
issue at a time. This is the path of a wise problem solver.
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Re: Embedding a for inside an html template for substitution

2013-03-04 Thread Michael Torrie

On 03/04/2013 08:14 AM, Ferrous Cranus wrote:
 Instead of writing the above html data inside my html template how
 would i write it with a for that then will be substituted by the
 python script?

What templating system are you using?  Django's?

 can you please write an example for me that user files.html and
 gets populates by files.py ?

If you're using a CGI script, just use a normal python for loop and
print out the stuff you want using this kind of notation:

for x in xrange(4):
print trtd{0}/td/tr.format(x)


Another alternative is to make your own templating system.  Have it load
and parse the html file (maybe using one of the xml or html parsers),
and substitude some sort of field marker for data.  But that is
re-inventing the wheel.

http://wiki.python.org/moin/Templating
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Re: [Python-ideas] string.format() default variable assignment

2013-03-04 Thread David Robinow

Ignoring my own posting ban, since I've clearly been misunderstood ..
On Sat, Mar 2, 2013 at 10:21 PM, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
 On Sat, 02 Mar 2013 21:11:04 -0500, David Robinow wrote:

  Do you consider it rude that you choose to use a newsreader, thus
 inconveniencing those of us who use the mailing list, as God intended.

 How the flying fuck does my choice of where and how *I* read this forum
 inconvenience YOU?

 Talk about an overactive sense of entitlement. The world does not revolve
 around you and I do not arrange my day to suit your preferences.

 This surprises me. Not the language but the content, since the
inconvenience was explicitly discussed.
  Many list members use gmail. It works for me. I never see double
posts. gmail knows not to do that. The lack of a reply to list
option would not concern me if everybody else used gmail. I could just
use reply all, nobody would see double posts, and we're all happy.
 However, some people prefer to read comp.lang.python. Thus if I use
what is most convenient me, the news users see double posts. To avoid
being thought rude (please note that many people are, or 'were' in the
case of python-list, unaware of this issue and should be classified as
ignorant rather than rude) I need to, after clicking Reply All

 Move mouse to CC: area.
 Highlight  python-list address
 C-x   (i.e.,  CUT)
 Move mouse to TO: area.
 Highlight the address (of the poster to whom I am replying)
 C-v   (i.e., PASTE)

 Is that horribly difficult? No, and I intend to do it in the future.
I'm mostly a lurker anyway (I knew python better 10 years ago when I
was still working - inactivity and advanced age have made me dumber. I
mostly read python-list for recreation) so it's not a big deal. I
might be annoyed if I posted more.
  But here's what I don't understand. Why does somebody who posts as
much as Steven (and thanks for that. Getting cussed at occasionally is
a cheap price for all the free advice) not set up a simple mail filter
which trashes all mail from python-list. Wouldn't that solve the
problem?  Or am I misunderstanding something?
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Re: [Python-ideas] string.format() default variable assignment

2013-03-04 Thread David Robinow

Crap. I just forgot to do what I just said I would do and didn't go
through my inconvenient sequence.
Sorry, Steven. It was unintentional.
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Re: Why is it impossible to create a compiler than can compile Python to machinecode like C?

2013-03-04 Thread Grant Edwards

On 2013-02-28, kramer65 kram...@gmail.com wrote:

 I'm using Python for a while now and I love it. There is just one
 thing I cannot understand. There are compilers for languages like C
 and C++. why is it impossible to create a compiler that can compile
 Python code to machinecode?

The main issue is that python has dynamic typing.  The type of object
that is referenced by a particular name can vary, and there's no way
(in general) to know at compile time what the type of object foo is.

That makes generating object code to manipulate foo very difficult.


 My reasoning is as follows: When GCC compiles a program written in
 C++, it simply takes that code and decides what instructions that
 would mean for the computer's hardware. What does the CPU need to do,
 what does the memory need to remember, etc. etc. If you can create
 this machinecode from C++, then I would suspect that it should also
 be possible to do this (without a C-step in between) for programs
 written in Python.

 Where is my reasoning wrong here? Is that because Python is
 dynamically typed?

Yes.

 Does machinecode always need to know whether a
 variable is an int or a float?

Yes. Not only might it be an int or a float, it might be a string, a
list, a dictionary, a network socket, a file, or some user-defined
object type that the compiler has no way of knowing about.

 And if so, can't you build a compiler which creates machinecode that
 can handle both ints and floats in case of doubt?

That's pretty much what you've got now.  The Python compiler compiles
the source code as much as it can, and the VM is the machinecode that
can handle both ints and floats.

 Or is it actually possible to do, but so much work that nobody does
 it?

 I googled around, and I *think* it is because of the dynamic typing,
 but I really don't understand why this would be an issue..

Can you explain how to generate machine code to handle any possible
object type than any Python user might ever create?

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  at   FLAVORING!!
  gmail.com
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Re: Question on for loop

2013-03-04 Thread Ian Kelly

On Mon, Mar 4, 2013 at 7:34 AM, Bryan Devaney bryan.deva...@gmail.com wrote:
 if character not in lettersGuessed:

 return True

 return False

 assuming a function is being used to pass each letter of the letters guessed 
 inside a loop itself that only continues checking if true is returned, then 
 that could work.

 It is however more work than is needed.

 If you made secretword a list,you could just

 set(secretword)set(lettersguessed)

 and check the result is equal to secretword.

Check the result is equal to set(secretword), I think you mean.

set(secretword).issubset(set(lettersguessed))

might be slightly more efficient, since it would not need to build and
return an intersection set.

One might also just do:

all(letter in lettersguessed for letter in secretword)

Which will be efficient if lettersguessed is already a set.
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Re: i need help

2013-03-04 Thread Ian Kelly

On Mon, Mar 4, 2013 at 8:07 AM, Bryan Devaney bryan.deva...@gmail.com wrote:
 On Sunday, March 3, 2013 6:45:26 PM UTC, Kwpolska wrote:

 It is!  How else could he type those two question marks and 10 double-quotes?


 Onscreen Keyboard?

Or voice recognition, perhaps.  We have no idea what the OP's actual
input system might be, which is why it might be best not to harass him
over something so trivial as uncapitalized letters.  One post in this
thread pointing it out was plenty.
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Re: i need help

2013-03-04 Thread Alister

On Mon, 04 Mar 2013 07:07:53 -0800, Bryan Devaney wrote:

 On Sunday, March 3, 2013 6:45:26 PM UTC, Kwpolska wrote:
 On Sun, Mar 3, 2013 at 7:46 AM, Michael Torrie torr...@gmail.com
 wrote:
 
  On 02/21/2013 03:18 AM, leonardo wrote:
 
  thanks, problem solved
 
 
 
  Apparently not.  The shift key on your keyboard still seems to be
 
  non-functional. ;)
 
  --
 
  http://mail.python.org/mailman/listinfo/python-list
 
 
 
 It is!  How else could he type those two question marks and 10
 double-quotes?
 
 
 
 --
 
 Kwpolska http://kwpolska.tk | GPG KEY: 5EAAEA16
 
 stop html mail| always bottom-post
 
 http://asciiribbon.org| http://caliburn.nl/topposting.html
 
 Onscreen Keyboard?

using alt  the numeric keypad ?

alt 62,  alt 34



-- 
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Just won't let you be.
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Re: Question on for loop

2013-03-04 Thread Ricardo Aráoz


El 04/03/13 09:18, newtopython escribió:

Hi all,

I'm super new to python, just fyi.

In the piece of code below, secretWord is a string and lettersGuessed is a 
list. I'm trying to find out if ALL the characters of secretWord are included 
in lettersGuessed, even if there are additional values in the lettersGuessed 
list that aren't in secretWord.

What this code is doing is only checking the first character of secretWord and 
then returning True or False. How do I get it to iterate through ALL of the 
characters of secretWord?

for character in secretWord:
 if character not in lettersGuessed:
 return True
return False

Thanks!

Ro


Indent the return True line so that it is inside the if clause.

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Re: Embedding a for inside an html template for substitution

2013-03-04 Thread Ferrous Cranus

Τη Δευτέρα, 4 Μαρτίου 2013 5:59:34 μ.μ. UTC+2, ο χρήστης Michael Torrie έγραψε:
 On 03/04/2013 08:14 AM, Ferrous Cranus wrote:
 
  Instead of writing the above html data inside my html template how
 
  would i write it with a for that then will be substituted by the
 
  python script?
 
 
 
 What templating system are you using?  Django's?
 
 
 
  can you please write an example for me that user files.html and
 
  gets populates by files.py ?
 
 
 
 If you're using a CGI script, just use a normal python for loop and
 
 print out the stuff you want using this kind of notation:
 
 
 
 for x in xrange(4):
 
 print trtd{0}/td/tr.format(x)
 
 
 
 
 
 Another alternative is to make your own templating system.  Have it load
 
 and parse the html file (maybe using one of the xml or html parsers),
 
 and substitude some sort of field marker for data.  But that is
 
 re-inventing the wheel.
 
 
 
 http://wiki.python.org/moin/Templating



Firstly thank you for your answer, but iam a bit confised.

can i just put the liens you provided me inside files.html and thwy will work?

Thats pure pythjon code!

for x in xrange(4): 
print trtd{0}/td/tr.format(x) 

wont html complain?
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How to Nest Structs?

2013-03-04 Thread Ari King

Hi,

I'm trying to nest the info_header, info_body, and info_trailer structs 
(see below) into a data_packet struct. Does anyone know how I can/should 
accomplish this? Thanks.

batch_header_format = struct.Struct('!c2h')
info_header_format = struct.Struct('!2hl')
mkt_status_format = struct.Struct('!c')
info_trailer_format = struct.Struct('!hc')

mkt_session_codes = [b'PO',b'PC',b'CO',b'CC',b'CK',b'CL']
mkt_type = [b'N',b'S',b'O',b'A',b'C',b'G']

batch_header = batch_header_format.pack(b'1',1,1024)

total_size = info_header_format.size + mkt_status_format.size + 
info_trailer_format.size

# Combine following into data struct.
info_header = 
info_header_format.pack(int(binascii.hexlify(mkt_session_codes[random.randint(0,5)])),
 total_size, 124)
info_body = mkt_status_format.pack(mkt_type[random.randint(0,5)])
info_trailer = info_trailer_format.pack(0, b'\r')

-Ari
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Re: [Python-ideas] string.format() default variable assignment

2013-03-04 Thread Dave Angel


On 03/04/2013 11:15 AM, David Robinow wrote:

Crap. I just forgot to do what I just said I would do and didn't go
through my inconvenient sequence.
Sorry, Steven. It was unintentional.



FWIW, you don't have to bother moving the python-list address to a To: 
field.  Just remove the personal address that's there.  See I saved you 
a few keystrokes.



To:  blank
CC:  python-list

should work fine.

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Re: Read csv file and create a new file

What you wrote seems interesting but i haven't understood.
Can you explain in simple words considering i'm italian and i'm not 
understanding so well some terms you use.
Sorry, i'm sure you are suggesting something really valid but can't 
understand it.

Marco.
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Python script not working on windows 7 but works fine on linux

The following scripts are working fine on linux but, using the same 
version, can't work on windows because i receive the following message:

Script:


import json
import urllib
import csv

url = http://bitcoincharts.com/t/markets.json;
response = urllib.urlopen(url);
data = json.loads(response.read())

f = open(/home/io/btc_trading/markets.csv,wb)
c = csv.writer(f)

#apre un file di testo e legge il contenuto del file inserendolo in una 
stringa
esclusioni_file = open('/home/io/btc_trading/exclusions.txt','r')
esclusioni = []

for line in esclusioni_file:
 esclusioni.append(line.strip())
#print(esclusioni)


# write headers
c.writerow([Currency,Symbol,Bid, Ask, Volume])

for d in data :
if d[currency]  SLL:  #esclude la valuta di secondlife SLL
if d[bid] is not None and d[ask] is not None:
if d[symbol] not in esclusioni:
#print d[symbol]
c.writerow([str(d[currency]),str(d[symbol]),str(d
[bid]),str(d[ask]),str(d[currency_volume])])
#esclusioni.close()

Windows error :

Traceback (most recent call last):
  File C:\btc_trading\scripts
\import_json_2_csv_from_web_and_exclusions.py, line 10, in module
f = open(/home/io/btc_trading/markets.csv,wb)
IOError: [Errno 2] No such file or directory: '/home/io/btc_trading/
markets.csv'
 
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Re: Python script not working on windows 7 but works fine on linux

2013-03-04 Thread ian douglas


On 03/04/2013 11:06 AM, io wrote:

esclusioni_file = open('/home/io/btc_trading/exclusions.txt','r')

Windows error :

Traceback (most recent call last):
   File C:\btc_trading\scripts
\import_json_2_csv_from_web_and_exclusions.py, line 10, in module
 f = open(/home/io/btc_trading/markets.csv,wb)
IOError: [Errno 2] No such file or directory: '/home/io/btc_trading/
markets.csv'


The error tells you everything you need to know: the file system has no 
path/file called /home/io/btc_trading/markets.csv


I imagine your CSV file lives in a different location on your Windows 7 
system (which also uses back-slashes '\' instead of forward-slashes '/', 
so you'll need to maybe do a try/except around the open() call to open a 
Windows path like open(c:\\users\\io\\Documents\\markets.csv) or 
whatever. OR you'll need to do some OS detection ahead of time to set 
the file path properly.


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Re: Python script not working on windows 7 but works fine on linux

2013-03-04 Thread Christian Gollwitzer


Am 04.03.13 20:06, schrieb io:

The following scripts are working fine on linux but, using the same
version, can't work on windows because i receive the following message:



snip


f = open(/home/io/btc_trading/markets.csv,wb)




Windows error :

Traceback (most recent call last):
   File C:\btc_trading\scripts
\import_json_2_csv_from_web_and_exclusions.py, line 10, in module
 f = open(/home/io/btc_trading/markets.csv,wb)
IOError: [Errno 2] No such file or directory: '/home/io/btc_trading/
markets.csv'





Are you actually reading that error message? You have an absolute path 
in script! This /home/io... would something like C:/btc_trading/... on 
Windows.


This is not a Python question, it is a Linux/Windows question. Ask your 
local IT guy.


Christian
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Re: Python script not working on windows 7 but works fine on linux

2013-03-04 Thread Wolfgang Strobl

io mar...@libero.it:

The following scripts are working fine on linux but, using the same 
version, can't work on windows because i receive the following message:

Thats because there is No such file or directory: '/home/io/btc_trading/
on that Windows PC.


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Re: Python script not working on windows 7 but works fine on linux

Genius!

The code i posted was an example. 
My real code was c:\btc_trading 

i was just missing the double slashes!

Thanks , thankyou very much.

:-)
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Re: Python script not working on windows 7 but works fine on linux

Thanks,  btw ...i'm the IT guy!

I was missing the double slash as dougas suggested!++Thanks anyway.
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Re: Python script not working on windows 7 but works fine on linux

On Tue, Mar 5, 2013 at 6:59 AM, io mar...@libero.it wrote:
 Genius!

 The code i posted was an example.
 My real code was c:\btc_trading 

 i was just missing the double slashes!

 Thanks , thankyou very much.

 :-)

Even on Windows, you can use / as a directory separator. This
generally saves you the trouble of switching to \\ for everything;
though still, absolute paths are often wrong. But at least you can use
relative paths safely!

ChrisA
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Re: Python script not working on windows 7 but works fine on linux

2013-03-04 Thread Terry Reedy


On 3/4/2013 2:20 PM, ian douglas wrote:


I imagine your CSV file lives in a different location on your Windows 7
system (which also uses back-slashes '\' instead of forward-slashes '/',


Forward slashes work fine on Windows except for invoking the executable 
at a Command Prompt command line, where '/' marks an option.


 open('/programs/python33/python.exe')
_io.TextIOWrapper name='/programs/python33/python.exe' mode='r' 
encoding='cp1252'


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Terry Jan Reedy

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Re: How to Nest Structs?

2013-03-04 Thread web

Try unpacking the nested struct as a fixed width string and then unpacking the 
string.  

Then unpack the string 

On Monday, March 4, 2013 10:22:07 AM UTC-8, Ari King wrote:
 Hi,
 
 
 
 I'm trying to nest the info_header, info_body, and info_trailer structs 
 (see below) into a data_packet struct. Does anyone know how I can/should 
 accomplish this? Thanks.
 
 
 
 batch_header_format = struct.Struct('!c2h')
 
 info_header_format = struct.Struct('!2hl')
 
 mkt_status_format = struct.Struct('!c')
 
 info_trailer_format = struct.Struct('!hc')
 
 
 
 mkt_session_codes = [b'PO',b'PC',b'CO',b'CC',b'CK',b'CL']
 
 mkt_type = [b'N',b'S',b'O',b'A',b'C',b'G']
 
 
 
 batch_header = batch_header_format.pack(b'1',1,1024)
 
 
 
 total_size = info_header_format.size + mkt_status_format.size + 
 info_trailer_format.size
 
 
 
 # Combine following into data struct.
 
 info_header = 
 info_header_format.pack(int(binascii.hexlify(mkt_session_codes[random.randint(0,5)])),
  total_size, 124)
 
 info_body = mkt_status_format.pack(mkt_type[random.randint(0,5)])
 
 info_trailer = info_trailer_format.pack(0, b'\r')
 
 
 
 -Ari
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فيس بوك facebook

2013-03-04 Thread 23alagmy

فيس بوك facebook

https://www.facebook.com/pages/%D9%86%D8%AA%D8%A7%D8%A6%D8%AC-%D8%A7%D9%84%D8%A7%D9%85%D8%AA%D8%AD%D8%A7%D9%86%D8%A7%D8%AA-%D9%88%D8%A7%D9%84%D8%AC%D8%A7%D9%85%D8%B9%D8%A7%D8%AA-%D9%88%D8%A7%D8%AC%D8%AA%D9%85%D8%A7%D8%B9%D9%8A%D8%A7%D8%AA/299719160065550?ref=hl
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Re: Why is it impossible to create a compiler than can compile Python to machinecode like C?

2013-03-04 Thread CM


 The main issue is that python has dynamic typing.  The type of object
 that is referenced by a particular name can vary, and there's no way
 (in general) to know at compile time what the type of object foo is.

 That makes generating object code to manipulate foo very difficult.

Could you help me understand this better?  For example, if you
have this line in the Python program:

foo = 'some text'
bar = {'apple':'fruit'}

If the interpreter can determine at runtime that foo is a string
and bar is a dict, why can't the compiler figure that out at
compile time?  Or is the problem that if later in the program
you have this line:

foo = 12

now foo is referring to an integer object, not a string, and
compilers can't have two names referring to two different
types of objects?  Something like that?

I in no way doubt you that this is not possible, I just don't
understand enough about how compiling works to yet get
why dynamic typing is a problem for compilers.

Thanks.
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Re: Why is it impossible to create a compiler than can compile Python to machinecode like C?

2013-03-04 Thread 88888 Dihedral

On Tuesday, March 5, 2013 6:55:06 AM UTC+8, CM wrote:
  The main issue is that python has dynamic typing.  The type of object
 
  that is referenced by a particular name can vary, and there's no way
 
  (in general) to know at compile time what the type of object foo is.
 
 
 
  That makes generating object code to manipulate foo very difficult.
 
 
 
 Could you help me understand this better?  For example, if you
 
 have this line in the Python program:
 
 
 
 foo = 'some text'
 
 bar = {'apple':'fruit'}
 
 
 
 If the interpreter can determine at runtime that foo is a string
 
 and bar is a dict, why can't the compiler figure that out at
 
 compile time?  Or is the problem that if later in the program
 
 you have this line:
 
 
 
 foo = 12
 
 
 
 now foo is referring to an integer object, not a string, and
 
 compilers can't have two names referring to two different
 
 types of objects?  Something like that?
 
 
 
 I in no way doubt you that this is not possible, I just don't
 
 understand enough about how compiling works to yet get
 
 why dynamic typing is a problem for compilers.
 
 
 
 Thanks.

The dynamic type part is normally in the higher level components of 
objects and functions and generators.

Of course if one can be sure of the types of variables used 
in some functions then that is the cython way to speed up pure OOP python
programs in executions.



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Re: Why is it impossible to create a compiler than can compile Python to machinecode like C?

2013-03-04 Thread Terry Reedy


On 3/4/2013 5:55 PM, CM wrote:


Could you help me understand this better?  For example, if you
have this line in the Python program:

foo = 'some text'
bar = {'apple':'fruit'}

If the interpreter can determine at runtime that foo is a string
and bar is a dict, why can't the compiler figure that out at
compile time?  Or is the problem that if later in the program
you have this line:

foo = 12

now foo is referring to an integer object, not a string, and
compilers can't have two names referring to two different
types of objects?


I believe you mean one name referring to multiple types.


Something like that?


Something like that. In python, objects are strongly typed, names do not 
have types. Or if you prefer, names are typed according to their current 
binding, which can freely change. As for why this can be an advantage, 
consider this simple function.


def min2(a, b):
  if a = b:
return a
  else:
return b

When the def statement is executed, the names 'a' and 'b' have no 
binding and therefore no type, not even a temporary type.


In a statically typed language, either you or the compiler must rewrite 
that function for every pair of types that are ever input to min2. If 
the compiler does it, it either has to analyze an entire program, or it 
have to compile variations on the fly, as needed. The latter is what the 
psycho module, and, I believe, the pypy jit compiler does.


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Re: Why is it impossible to create a compiler than can compile Python to machinecode like C?

On Tue, Mar 5, 2013 at 9:55 AM, CM cmpyt...@gmail.com wrote:

 The main issue is that python has dynamic typing.  The type of object
 that is referenced by a particular name can vary, and there's no way
 (in general) to know at compile time what the type of object foo is.

 That makes generating object code to manipulate foo very difficult.

 Could you help me understand this better?  For example, if you
 have this line in the Python program:

 foo = 'some text'
 bar = {'apple':'fruit'}

 If the interpreter can determine at runtime that foo is a string
 and bar is a dict, why can't the compiler figure that out at
 compile time?  Or is the problem that if later in the program
 you have this line:

 foo = 12

 now foo is referring to an integer object, not a string, and
 compilers can't have two names referring to two different
 types of objects?  Something like that?

 I in no way doubt you that this is not possible, I just don't
 understand enough about how compiling works to yet get
 why dynamic typing is a problem for compilers.

Python doesn't have variables with values; it has names, which may
(or may not) point to objects. Dynamic typing just means that one name
is allowed to point to multiple different types of object at different
times.

The problem with dynamic typing is more one of polymorphism. Take this
expression as an example:

foo += bar;

In C, the compiler knows the data types of the two variables, and can
compile that to the appropriate code. If they're both integers,
that'll possibly become a single machine instruction that adds two
registers and stores the result back.

In C++, foo could be a custom class with an operator+= function. The
compiler will know, however, what function to call; unless it's a
virtual function, in which case there's a run-time check to figure out
what subclass foo is of, and then the function is called dynamically.

In Python, *everything* is a subclass of PyObject, and every function
call is virtual. That += operation is backed by the __iadd__ function,
defined by PyObject and possibly overridden by whatever type foo is.
So, at run time, the exact function is looked up.

C++ is most definitely a compiled language, at least in most
implementations I've seen. But it has the exact same issue as Python
has: true dynamism requires run-time lookups. That's really what
you're seeing here; it's nothing to do with any sort of compiled vs
interpreted dichotomy, but with compile time vs run time
lookups. In C, everything can be done at compile time; in Python, most
things are done at run time.

It's mainly a matter of degree. A more dynamic language needs to do
more work at run time.

ChrisA
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Re: Why is it impossible to create a compiler than can compile Python to machinecode like C?

2013-03-04 Thread Benjamin Kaplan

On Mar 4, 2013 3:02 PM, CM cmpyt...@gmail.com wrote:


  The main issue is that python has dynamic typing.  The type of object
  that is referenced by a particular name can vary, and there's no way
  (in general) to know at compile time what the type of object foo is.
 
  That makes generating object code to manipulate foo very difficult.

 Could you help me understand this better?  For example, if you
 have this line in the Python program:

 foo = 'some text'
 bar = {'apple':'fruit'}

 If the interpreter can determine at runtime that foo is a string
 and bar is a dict, why can't the compiler figure that out at
 compile time?  Or is the problem that if later in the program
 you have this line:

 foo = 12

 now foo is referring to an integer object, not a string, and
 compilers can't have two names referring to two different
 types of objects?  Something like that?

 I in no way doubt you that this is not possible, I just don't
 understand enough about how compiling works to yet get
 why dynamic typing is a problem for compilers.

 Thanks.
 --
 http://mail.python.org/mailman/listinfo/python-list

In the case of literals, the compiler can figure out type information (and
I believe it does do some constant folding). But as soon as you let
something else get in between you and the constant, you lose all guarantees.

import random

if random.random() 0.5 :
spam = 3
else:
spam = hello world

Then you get into monkey patching and dealing with types that may not be
defined at compile time. The only way a python compiler could convert that
to x86 assembly is if generated code that would look up the type
information at runtime. You'd basically be outputting a python interpreter.
-- 
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Re: Why is it impossible to create a compiler than can compile Python to machinecode like C?

On Mon, 04 Mar 2013 16:36:36 +, Grant Edwards wrote:

 On 2013-02-28, kramer65 kram...@gmail.com wrote:
 
 I'm using Python for a while now and I love it. There is just one thing
 I cannot understand. There are compilers for languages like C and C++.
 why is it impossible to create a compiler that can compile Python code
 to machinecode?
 
 The main issue is that python has dynamic typing.  The type of object
 that is referenced by a particular name can vary, and there's no way (in
 general) to know at compile time what the type of object foo is.
 
 That makes generating object code to manipulate foo very difficult.

That's only a limitation with a static compiler that tries to generate 
fast machine code at compile time. A JIT compiler can generate fast 
machine code at runtime. The idea is that the time you save by running 
more optimized code is greater than the time it costs to generate that 
code each time you run. If not, then you just run the normal byte-code 
you would have run, and you've lost very little.

This has been a very successful approach. Psyco worked very well, and 
it's successor PyPy seems to work even better. PyPy, on average, runs 
about 5-6 times faster than CPython, and for some tasks about 50 times 
faster. That makes it broadly speaking as fast as Java and approaching C, 
and even in some circumstances even beat static C compilers. (Admittedly 
only under very restrictive circumstances.)

The downside is that JIT compilers need a lot of memory. To oversimplify, 
you might take source code like this:

x = a + b

A static compiler knows what types a and b are, and can turn it into a 
single fairly compact piece of machine code. Using my own crappy invented 
machine code notation:

ADD a, b
STORE x


A JIT compiler has to generate a runtime check and one or more fast 
branches, plus a fallback:


CASE (a and b are both ints):
ADD a, b
STORE x
CASE (a and b are both strings):
COPY a, x
CONCATENATE b, x
OTHERWISE:
execute byte code to add two arbitrary objects


The above is probably nothing like the way PyPy actually works. Anyone 
interested in how PyPy really works should spend some time reading their 
website and blog.

http://pypy.org/


I can especially recommend this to give you a flavour for just how 
complicated this sort of thing can become:

http://morepypy.blogspot.com.au/2011/01/loop-invariant-code-motion.html



-- 
Steven
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Re: Python script not working on windows 7 but works fine on linux

On Mon, 04 Mar 2013 11:20:28 -0800, ian douglas wrote:

 The error tells you everything you need to know: the file system has no
 path/file called /home/io/btc_trading/markets.csv
 
 I imagine your CSV file lives in a different location on your Windows 7
 system (which also uses back-slashes '\' instead of forward-slashes '/',

Windows understands forward slashes in paths too. You can make your code 
(almost) platform-independent, and avoid a lot of problems with unescaped 
backslashes, by always using forward slashes in paths.



-- 
Steven
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Re: Python script not working on windows 7 but works fine on linux

2013-03-04 Thread Andrew Berg

On 2013.03.04 19:58, Steven D'Aprano wrote:
 Windows understands forward slashes in paths too. You can make your code 
 (almost) platform-independent, and avoid a lot of problems with unescaped 
 backslashes, by always using forward slashes in paths.
Or use os.path.join, the entire purpose of which is to create suitable
paths dynamically.

-- 
CPython 3.3.0 | Windows NT 6.2.9200 / FreeBSD 9.1
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Re: [Python-ideas] string.format() default variable assignment

On Mon, 04 Mar 2013 11:09:10 -0500, David Robinow wrote:

   But here's what I don't understand. Why does somebody who posts as
 much as Steven (and thanks for that. Getting cussed at occasionally is a
 cheap price for all the free advice) not set up a simple mail filter
 which trashes all mail from python-list. Wouldn't that solve the
 problem?  Or am I misunderstanding something?

When I'm working in my backyard garden, it's a real drag to put garden 
refuse into the green waste bin for collection. I have to cut it up into 
manageable-sized pieces, put them in a big carry bag, carry it through 
the house, then empty the bag into the green waste collection bin the 
local council supplies. What a drag! Maybe I should have thought of this 
before moving into my house, but I'm stuck with it now, moving to a new 
house would be difficult and expensive. Besides, apart from this one 
little difficulty, I like it here. Since I have all sorts of good excuses 
why doing the right thing is too much trouble, I just toss any plant 
trimmings over the fence into my neighbour's yard. It's easy for him to 
deal with it, all he has to do is get a goat to eat the garden waste I 
toss over the fence, and his problem is solved.

I'm actually doing him a favour by tossing my garden trimmings into his 
yard. If he doesn't get a goat, the trimmings will rot and turn into 
compost, which improves the soil in his garden. He'll thank me some day.

I really don't understand why he thinks I'm being rude. He should be 
grateful, not upset. If anyone is being rude, it's him, expecting me to 
carry all that garden waste through the house into the collection bin. 
Doesn't he understand how hard that is for me?




-- 
Steven
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Re: [Python-ideas] string.format() default variable assignment

On Tue, Mar 5, 2013 at 1:42 PM, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
 It's easy for him to
 deal with it, all he has to do is get a goat to eat the garden waste I
 toss over the fence, and his problem is solved.

Sounds like someone got Steven's goat.

*dives for cover*

ChrisA
-- 
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Re: Python script not working on windows 7 but works fine on linux

2013-03-04 Thread 88888 Dihedral

On Tuesday, March 5, 2013 3:20:28 AM UTC+8, ian douglas wrote:
 On 03/04/2013 11:06 AM, io wrote:
 
  esclusioni_file = open('/home/io/btc_trading/exclusions.txt','r')
 
 
 
  Windows error :
 
 
 
  Traceback (most recent call last):
 
 File C:\btc_trading\scripts
 
  \import_json_2_csv_from_web_and_exclusions.py, line 10, in module
 
   f = open(/home/io/btc_trading/markets.csv,wb)
 
  IOError: [Errno 2] No such file or directory: '/home/io/btc_trading/
 
  markets.csv'
 
 
 
 The error tells you everything you need to know: the file system has no 
 
 path/file called /home/io/btc_trading/markets.csv
 
 
 
 I imagine your CSV file lives in a different location on your Windows 7 
 
 system (which also uses back-slashes '\' instead of forward-slashes '/', 
 
 so you'll need to maybe do a try/except around the open() call to open a 
 
 Windows path like open(c:\\users\\io\\Documents\\markets.csv) or 
 
 whatever. OR you'll need to do some OS detection ahead of time to set 
 
 the file path properly.

Well, I'll suggest an old trick I did long time ago to resolve
the platform dependent problem in python.

Just write a generator as a buffered input method to work under some
file of some OS correctly first, then you can pass the generator which
is tested rigorously to act properly in the function or the object which will
use the generator to sip up the data to perform jobs.
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UPDATE ~ The Perfect Guide To Actionable Programming Thank You ~

2013-03-04 Thread Claira

Thanks for the few answers, though those few were very Helpful. The problem
was that some people (even after 4 or more years of university), especially
including almost all beginners, do not know how to start building something
that does something helpful for soceity and everyone around them -- and
this is yet to be resolved.

I read a whole bunch of reviews of the learning resources I linked to last
month. Here's one I Love -- There should be exaggerated claims of ultimate
learning outcomes without evidence[1] My response, attached with the
answers below for reference: When wonderful talents do things like
kickstarter.com/projects/1369857650/real-python-for-web-development-featuring-web2pyhttp://www.kickstarter.com/projects/1369857650/real-python-for-web-development-featuring-web2py--
I wonder about what is even more significant -- Is it effective? Does
it solve the problem? When I (and others far newer than me) have a serious
problem like this, you know, we care very much for accurate and reliable
data. When people say Learn Python the Hardway is probably the best
resource you listed.. [and] you *will *learn the material.. when clearly
it doesn't meet standards: I have seeen plenty of stackoverflow and
student questions about it. In short, it's horrible. I start to wonder
about the reliability of their judgement, and how partial they really are.
Even if A friend of mine wrote the course is not factor we care about.
Maybe hardway was the highest Quality resource out of those (I personally
liked the MIT videos from what I've seen). So maybe, but best in the room
with a low ceiling isn't very good. I try really really hard not to touch
objects of low quality (4.9 stars)
http://www.amazon.com/Programming-Python-Mark-Lutz/dp/0596158106

I've been trying to learn programming for 8 years, so I'm a great
canidiate. So Michael, I would gladly give you any feedback on the
usability of your product anytime you ask :)

[1] http://blog.oreillyschool.com/2011/12/my-thoughts-on-codecademy.html

On Thu, Feb 21, 2013 at 11:32 AM, Philipp Hagemeister phi...@phihag.de
wrote:

http://learnpythonthehardway.org/book/
I have never used that myself, but I have seeen plenty of stackoverflow
and student questions about it. In short, it's horrible.

The book mostly consists of basic Python programs, and beginners often
fail to grasp even the most basic structures demonstrated, mainly
because they're not explained. The book has some of the easy-to-approach
informality of, say, the Head First ones, but fails to contain the the
actual explanations for it.

(And I have no idea why one would start with Python 2.x, given that
everything's strange in there - instead of relying on the intuitive
grasp that both a and ä are single character strings, and that print
is a function like any other, they have to work with a lot of magic and
hand-waving)

- Philipp

On Thu, Feb 21, 2013 at 11:10 AM, Mark Janssen dreamingforw...@gmail.com
wrote:

Sorry, I gave you the wrong book (a different Lutz book). The correct
title is _Programming Python_, by Mark Lutz. It's like 1600 pages and
is application focused.

Cheers!
mark

On Thu, Feb 21, 2013 at 7:40 AM, Michael Herman herma...@gmail.com wrote:

Hi Claira,

I understand how hard it can be. Learn Python the Hardway is probably the
best resource you listed. It's a bit unorganized, but you *will *learn
the material if you go through all the exercises and homework problems.

That said, the author does dive into some areas that are not really
necessary for beginners, which is a problem with most Python books. Check
out http://www.realpython.com/. It's one of the best resources out there.
A friend of mine wrote the course. Right now, I am in the process of
writing a companion course called Real Python for the Web, where you learn
how to develop websites. So, you would start with the first course to learn
the syntax and then you could move onto the second course to learn web
development.

The Kickstarter is live for the second course - http://kck.st/VQj8hq

There is a special right now where you can get both courses for $25 on the
Kickstarter. Plus, once I hit $15k, which should be in the next few days, I
will hit a stretch goal for making video tutorials for the first course.

Anyway, sorry to plug my product - but I feel your pain, which is why Real
Python was developed in the first place: Less syntax and theory, more
coding and learning. Learning by doing.

Let me know if you have any more questions.

Best,

Michael

On Thu, Feb 21, 2013 at 2:08 AM, Claira wavecla...@gmail.com wrote:

The problem: I've done reading (like on quora), and it seems lots of
beginners (and I know first-hand for me), and even for those that have done
4 years at university -- that they say they don't know how to build
something after all the theory and stuff. Even though I'm not going to be a
programmer, in the future, there may be something that would need

Re: Embedding a for inside an html template for substitution

2013-03-04 Thread Michael Torrie

On 03/04/2013 01:06 PM, Ferrous Cranus wrote:
 What do you advise me to do?
 Generate html via python code like print '''stuf..'''  or use an 
 html templating system?
 Up until now i was using the first method and i though it would be a 
 nice idea to seperate design from code.
 
 But please also provide me a simple example of 'files.html' and 
 'files.py' so i can understand how does the templating system you 
 mentioned work. Was it Django?!


Just generating html code is simple, but it does become a bit messy over
time.

Check out that link in my previous e-mail to a list of python templating
engines.  Choose one and try it.  No I cannot provide any example code.
 I haven't used any of these systems; I'm just googling for you.  Most
of them come with examples anyway.

Check out, among others:
http://www.cheetahtemplate.org/docs/users_guide_html/
And actually this one uses cheetah to do static pages (not a full-blown
web app):
http://www.ivy.fr/tahchee/

I do recommend you at least take a look at Django.  It may be overkill
for your needs.  It does contain a templating engine, but it also
contains a whole lot more useful things for doing web-based applications.

Here's the link in case you missed it:
http://wiki.python.org/moin/Templating
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Re: [Python-ideas] string.format() default variable assignment

2013-03-04 Thread Gene Heskett

On Monday 04 March 2013 23:00:31 Chris Angelico did opine:

 On Tue, Mar 5, 2013 at 1:42 PM, Steven D'Aprano
 
 steve+comp.lang.pyt...@pearwood.info wrote:
  It's easy for him to
  deal with it, all he has to do is get a goat to eat the garden waste I
  toss over the fence, and his problem is solved.
 
 Sounds like someone got Steven's goat.
 
 *dives for cover*
 
 ChrisA

Thats why this list is worth staying on. :)  FWIW, I'd pulled the cover 
down tight and hide for a while.

Cheers, Gene
-- 
There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order.
-Ed Howdershelt (Author)
My web page: http://coyoteden.dyndns-free.com:85/gene is up!
My views 
http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml
You stay here, Audrey -- this is between me and the vegetable!
-- Seymour, from _Little Shop Of Horrors_
I was taught to respect my elders, but its getting 
harder and harder to find any...
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Re: Python SUDS issue

2013-03-04 Thread VGNU Linux

Hi,
Typing URL in the browser displays document tree as a web page.
Is it right or there is something wrong with it ?

Regards,
VGNU


On Mon, Mar 4, 2013 at 6:45 PM, Joel Goldstick joel.goldst...@gmail.comwrote:




 On Mon, Mar 4, 2013 at 5:37 AM, VGNU Linux vgnuli...@gmail.com wrote:

 Hi Guys,
 I am pretty new to web services.
 After some googling found that python suds is a suitable module to create
 web service client. I am trying to create a client but its giving me an
 error which is quite confusing for me.

 Here is my code:
 from suds.client import Client
 wsdlurl = 'https://46.51.221.138/PBExternalServices/v1/soap?wsdl'



 What happens when you type this in your browser:
 https://46.51.221.138/PBExternalServices/v1/soap?wsdl


 client = Client(wsdlurl)
 print client

 And following is the error that occurs on trying to print client.
 Traceback (most recent call last):
   File trysuds.py, line 3, in module
 client = Client(wsdlurl)
   File C:\Python25\Lib\site-packages\suds\client.py, line 112, in
 __init__
 self.wsdl = reader.open(url)
   File C:\Python25\Lib\site-packages\suds\reader.py, line 152, in open
 d = self.fn(url, self.options)
   File C:\Python25\Lib\site-packages\suds\wsdl.py, line 159, in __init__
 self.build_schema()
   File C:\Python25\Lib\site-packages\suds\wsdl.py, line 220, in
 build_schema
 self.schema = container.load(self.options)
   File C:\Python25\Lib\site-packages\suds\xsd\schema.py, line 95, in
 load
 child.dereference()
   File C:\Python25\Lib\site-packages\suds\xsd\schema.py, line 323, in
 dereference
 midx, deps = x.dependencies()
   File C:\Python25\Lib\site-packages\suds\xsd\sxbasic.py, line 469, in
 dependencies
 raise TypeNotFound(self.ref)
 suds.TypeNotFound: Type not found: '(GetAccountBalanceFaultResponse,
 http://www.payback.net/lmsglobal/xsd/v1/types, )'

 Appreciate your help.
 Thanks in advance,
 VGNU

 --
 http://mail.python.org/mailman/listinfo/python-list




 --
 Joel Goldstick
 http://joelgoldstick.com

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Pythonic way for retrieving value for a nested dictionary.

2013-03-04 Thread Lowly Minion

For a typical dict:

i.e. 
d = { '1': 'a', '2', 'b' }

I might use something like:

d.get('1', None)

To get the value of 1.

What would be the most pythonic way of getting a nested value of a dictionary 
within a list:

some_list = [{ 'item': { 'letter': 'b',
  'word': 'bar' }},
{ 'item': { 'letter': 'c',
  'word': 'charcoal' }}]

Currently I am looping through the list as such:

for item in some_list:
  print item['item']['letter']

One other method explored was:
item.get('item').get('letter')

Is a double get the best way? Doesn't seem right to me.

Thank you in advance for your help
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Re: Python SUDS issue

2013-03-04 Thread dieter

VGNU Linux vgnuli...@gmail.com writes:

 ...
 Here is my code:
 from suds.client import Client
 wsdlurl = 'https://46.51.221.138/PBExternalServices/v1/soap?wsdl'
 client = Client(wsdlurl)
 print client

 And following is the error that occurs on trying to print client.
 Traceback (most recent call last):
 ...
 dereference
 midx, deps = x.dependencies()
   File C:\Python25\Lib\site-packages\suds\xsd\sxbasic.py, line 469, in
 dependencies
 raise TypeNotFound(self.ref)
 suds.TypeNotFound: Type not found: '(GetAccountBalanceFaultResponse,
 http://www.payback.net/lmsglobal/xsd/v1/types, )'

Looks like a bug in the WSDL description of the web service.
It seems to reference a type GetAccountBalanceFaultResponse
associated with the namespace http://www.payback.net/lmsglobal/xsd/v1/types;,
but suds cannot find the type.

Maybe an import is missing in the WSDL description.

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Re: Pythonic way for retrieving value for a nested dictionary.

2013-03-04 Thread Dave Angel


On 03/05/2013 01:48 AM, Lowly Minion wrote:

For a typical dict:

i.e.
d = { '1': 'a', '2', 'b' }

I might use something like:

d.get('1', None)

To get the value of 1.

What would be the most pythonic way of getting a nested value of a dictionary 
within a list:

some_list = [{ 'item': { 'letter': 'b',
   'word': 'bar' }},
 { 'item': { 'letter': 'c',
   'word': 'charcoal' }}]

Currently I am looping through the list as such:

for item in some_list:
   print item['item']['letter']

One other method explored was:
item.get('item').get('letter')

Is a double get the best way? Doesn't seem right to me.

Thank you in advance for your help




I'm not sure what the puzzle is.  Use [key] if you know the key exists, 
and use get( key, default) if you don't.  But be aware that if the first 
key doesn't exist, then the default had better be a dict (rather than 
something like None), or the second lookup will throw an exception, even 
if you use get.


One other possibility, depending on just what you're doing with the 
data, is to wrap it in a try/catch.


However, if you know exactly what the keys are, perhaps you should use a 
namedtuple instead of a dict.


--
DaveA
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Re: Embedding a for inside an html template for substitution

2013-03-04 Thread nagia . retsina

Τη Δευτέρα, 4 Μαρτίου 2013 5:14:00 μ.μ. UTC+2, ο χρήστης Νίκος Γκρ33κ έγραψε:
 Hello pythonistas!
 
 
 
 I'am tryign to populate a table with dictionary keys and values:
 
 
 
 Foe that iam using an html template and the questions is what i should write 
 inside 'files.html' so then then the python script populate the table.
 
 
 
 table
 
   trthSuperHost - Economy/th/tr
 
   trtdΧώρος στο δίσκο: 1 GB/td/tr
 
   trtdΜηνιαία Κίνηση δεδομένων: 1 GB/td/tr
 
   trtdControl Panel: cPanel 11  Fantastico Deluxe/td/tr
 
   trtdDomains: 1/td/tr
 
   trtdSubdomains: 1/td/tr
 
   trtdFTP Accounts: 1/td/tr
 
   trtdEmails (POP3): 2/td/tr
 
   trtdWebMail: [ RoundCube|Horde|Squirrel ]: ΝΑΙ/td/tr
 
   trtdMysql Databases: 2/td/tr
 
 /table
 
 
 
 Instead of writing the above html data inside my html template how would i 
 write it with a for that then will be substituted by the python script?
 
 
 
 can you please write an example for me that user files.html and gets 
 populates by files.py ?
 
 
 
 i want os ee how it lloks like please!
 
 
 
 Thank you.

Thank you Michael, i have decided to use cheetahtemplate. It seems nice and 
simple, djanfo indeed is an overkill for me needs.
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[issue17328] Fix reference leak in dict_setdefault() in case of resize failure


Serhiy Storchaka added the comment:

LGTM. This is 3.3+ only issue as far as I understand.

--
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versions:  -Python 2.6, Python 2.7, Python 3.2

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[issue17345] Portable and extended type specifiers for array module

2013-03-04 Thread Nikita Nemkin


New submission from Nikita Nemkin:

Currently array module only provides platform-dependent type specifiers.
It would be very nice to have platform-independent specifiers in addition to 
that, matching the struct module.
For example array('H') - an array of little-endian 2-byte integers.

This issue crops up every time when I use array(). Binary data usually comes in 
some predefined format and a manual matching to native format has to be done 
(assuming I want to write portable code).

A useful extra would be to support multi-element struct specifiers and present 
an array of tuples in this case.
For example array('iff') - an array of tuples (int, float, float) with native 
types.

--
components: Library (Lib)
messages: 183425
nosy: nnemkin
priority: normal
severity: normal
status: open
title: Portable and extended type specifiers for array module
type: enhancement
versions: Python 3.4

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[issue17278] SIGSEGV in _heapqmodule.c

2013-03-04 Thread Raymond Hettinger


Changes by Raymond Hettinger raymond.hettin...@gmail.com:


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[issue17278] SIGSEGV in _heapqmodule.c

2013-03-04 Thread Raymond Hettinger


Raymond Hettinger added the comment:

Antoine, thanks for the patch.  This looks like a reasonable solution that is 
fast and prevents segfaults.

--
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[issue15216] Support setting the encoding on a text stream after creation

2013-03-04 Thread Nick Coghlan


Nick Coghlan added the comment:

That's a fair point - I think it's acceptable to throw an error in the case of 
*already decoded* characters that haven't been read.

There's also a discussion on python-ideas about an explicit API for clearing 
the internal buffers, and pushing data back into a stream. If that is added, 
then set_encoding() would be free to error out if there was any already 
buffered data - it would be up to the application to call clear_buffer() before 
calling set_encoding(), and deal with an such data appropriately (such as 
calling push_data() with the results of the clear_buffer() call)

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[issue15216] Support setting the encoding on a text stream after creation

2013-03-04 Thread Nick Coghlan


Nick Coghlan added the comment:

Oops, meant to link to my post in the thread about a buffer manipulation API: 
http://mail.python.org/pipermail/python-ideas/2013-March/019769.html

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[issue17346] Pickle tests do not test protocols 0, 1, and 2 for bytes

2013-03-04 Thread Marius Gedminas


New submission from Marius Gedminas:

I was reading Lib/test/pickletester.py when I noticed that test_bytes loops 
over all the protocols but doesn't actually use the loop variable anywhere.

Attached patch should fix this.

--
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files: actually-test-all-protocols.diff
keywords: patch
messages: 183429
nosy: mgedmin
priority: normal
severity: normal
status: open
title: Pickle tests do not test protocols 0, 1, and 2 for bytes
type: behavior
versions: Python 3.3
Added file: http://bugs.python.org/file29302/actually-test-all-protocols.diff

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[issue17346] Pickle tests do not test protocols 0, 1, and 2 for bytes

2013-03-04 Thread Ezio Melotti


Changes by Ezio Melotti ezio.melo...@gmail.com:


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[issue17347] bsddb._openDBEnv() should not touch current directory

2013-03-04 Thread Florian Weimer


New submission from Florian Weimer:

This code:

def _openDBEnv(cachesize):
e = db.DBEnv()
if cachesize is not None:
if cachesize = 20480:
e.set_cachesize(0, cachesize)
else:
raise error, cachesize must be = 20480
e.set_lk_detect(db.DB_LOCK_DEFAULT)
e.open('.', db.DB_PRIVATE | db.DB_CREATE | db.DB_THREAD | db.DB_INIT_LOCK | 
db.DB_INIT_MPOOL)
return e

causes Berkeley DB to read the DB_CONFIG file from the current directory, which 
may have unexpected side effects.  Unfortunately, Berkeley DB still reads 
./DB_CONFIG even if the first argument to DBEnv.open() is None/NULL, so the 
only way to suppress this behavior seems a non-existing or known-to-by-empty 
directory (such as /var/empty).

--
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nosy: fweimer
priority: normal
severity: normal
status: open
title: bsddb._openDBEnv() should not touch current directory
type: behavior
versions: Python 2.7

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[issue17348] Unicode - encoding seems to be lost for inputs of unicode chars

2013-03-04 Thread Pradyun Gedam


New submission from Pradyun Gedam:

In IDLE, I have spotted a peculiar problem.

I have attached an .png file which is a screen capture of 'session' on IDLE. It 
seems that the Unicode character that has been input, loses its encoding.

My 'session'
Python 2.7.2 (default, Jun 12 2011, 15:08:59) [MSC v.1500 32 bit (Intel)] on 
win32
Type copyright, credits or license() for more information.
 c = u'€'
 ord(c)
128
 c.encode('utf-8')
'\xc2\x80'
 c
u'\x80'
 print c

 c = u'\u20ac'
 ord(c)
8364
 c.encode('utf-8')
'\xe2\x82\xac'
 c
u'\u20ac'
 print c
€


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title: Unicode - encoding seems to be lost for inputs of unicode chars
versions: Python 2.7

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[issue17347] bsddb._openDBEnv() should not touch current directory

2013-03-04 Thread Jesús Cea Avión


Jesús Cea Avión added the comment:

This is a standard Berkeley DB behavior. Can I suggest you to report this 
issue to Oracle forums?

http://docs.oracle.com/cd/E17276_01/html/programmer_reference/env_db_config.html

https://forums.oracle.com/forums/forum.jspa?forumID=271

Closing as invalid. if you disagree, please reopen.

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[issue16620] Avoid using private function glob.glob1() in msi module and tools


Serhiy Storchaka added the comment:

I have added some comments on Rietveld.

Note that glob.glob() and glob.glob1() returns different filenames. The first 
returns full paths and the second returns bare filenames without a directory 
path. Workarounding this may require more in-depth changes to the code.

Actually this is a low priority issue. It is no so bad to use private functions 
from other modules inside Python stdlib. But it can be a bad example for a 
third party code.

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[issue13598] string.Formatter doesn't support empty curly braces {}

2013-03-04 Thread Phil Elson


Phil Elson added the comment:

 I didn't see a test case relating to the example in his comment, namely

 f.format({0:{}}, 'foo', 5)

 Did I miss it?


The example should fail, which it wouldn't have done with the patch previously 
proposed. I believe the case is covered by the block:

with self.assertRaises(ValueError):
fmt.format(foo{1}{}, bar, 6)

Though there is no harm in adding another test along the lines of:

with self.assertRaises(ValueError):
fmt.format({0:{}}, bar, 6)

If you think it is worthwhile?


I'm uncertain which documentation to update since the method which has had its 
signature updated is private and is called solely by Formatter.vformat .

Cheers,

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[issue17299] Test cPickle with real files


Serhiy Storchaka added the comment:

I have added comments on Rietveld.

Perhaps it will be worth to create mixings for cStringIO.StringIO, BytesIO and 
file object and then mix them to other tests.

Note that there is no sense to change pure Python pickle tests. Python 
implementation uses the same code for all streams. It's C implementation needs 
specialized tests (in Lib/test/test_cpickle.py).

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[issue17299] Test cPickle with real files


Serhiy Storchaka added the comment:

David, yes, this is 2.7 only issue. The code was broken recently (see msg182979 
in issue13555) due to insufficient testing.

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[issue17349] wsgiref.simple_server.demo_app is not PEP-3333 compatible

2013-03-04 Thread Andrey Lebedev


New submission from Andrey Lebedev:

Under certain circumstances, wsgiref.simple_server.demo_app may return unicode 
data, but that is prohibited by PEP-.

This happens if environ with unicode key is passed to demo_app. Unicode keys 
are then written to StringIO instance, automatically making its value unicode.

Type of environ keys is not strictly mandated by PEP-, however output of 
WSGI application is:

  When called by the server, the application object must return an iterable 
yielding zero or more bytestrings., see 
http://www.python.org/dev/peps/pep-/#specification-details

Test case is attached.

--
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files: wsgirefbug.py
messages: 183437
nosy: Andrey.Lebedev
priority: normal
severity: normal
status: open
title: wsgiref.simple_server.demo_app is not PEP- compatible
type: behavior
versions: Python 2.7
Added file: http://bugs.python.org/file29303/wsgirefbug.py

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[issue17346] Pickle tests do not test protocols 0, 1, and 2 for bytes


Serhiy Storchaka added the comment:

LGTM.

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[issue16851] Hint about correct ismethod and isfunction usage

2013-03-04 Thread Thomas Kluyver


Thomas Kluyver added the comment:

I agree that the docs for inspect.ismethod() for Python 2 are wrong.

The docs say: Return true if the object is a bound method written in Python.

However, it also returns True for an unbound method:

 class A:
... def meth(self):
... pass
... 
 A.meth
unbound method A.meth
 import inspect
 inspect.ismethod(A.meth)
True

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[issue17094] sys._current_frames() reports too many/wrong stack frames

2013-03-04 Thread Stefan Ring


Stefan Ring added the comment:

When I originally worked on this, I noticed that _PyThread_CurrentFrames also 
iterates over all interpreters. Because I have no experience with or use for 
multiple interpreters, I intentionally left it out of my patch, but shouldn't 
it be taken into account for a real patch?

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[issue1124861] subprocess fails on GetStdHandle in interactive GUI

2013-03-04 Thread Tomgu


Tomgu added the comment:

Here I get one problem need help. 
In python 2.7.5 version I write a script test.py as below
###
import subprocess
fileID=file('test1.log','w')
process_response = subprocess.call('netsh wlan show\ 
interface',stdout=fileID,shell=True)
fileID.flush()
fileID.close()
###
It run in windows7 os MSDOS console is OK
and I try to run it in STAF command

C:\ STAF local PROCESS START COMMAND python C:\test.py WAIT STDERRTOSTDOUT 
RETURNSTDOUT

Response

{
  Return Code: 1
  Key: None
  Files  : [
{
  Return Code: 0
  Data   : Traceback (most recent call last):
  File C:\test.py, line 3, in module
process_response = subprocess.call('netsh wlan show interface',stdout=fileID
,shell=True)
  File C:\Python27\lib\subprocess.py, line 493, in call
return Popen(*popenargs, **kwargs).wait()
  File C:\Python27\lib\subprocess.py, line 672, in __init__
errread, errwrite) = self._get_handles(stdin, stdout, stderr)
  File C:\Python27\lib\subprocess.py, line 784, in _get_handles
p2cread = self._make_inheritable(p2cread)
  File C:\Python27\lib\subprocess.py, line 823, in _make_inheritable
_subprocess.DUPLICATE_SAME_ACCESS)
WindowsError: [Error 6] The handle is invalid

}
  ]

I just start to learn python, I dont know how to resolve, need help.

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[issue1124861] subprocess fails on GetStdHandle in interactive GUI

2013-03-04 Thread Tomgu


Tomgu added the comment:

Update, the python version is '2.7.2 (default, Jun 12 2011, 15:08:59) [MSC 
v.1500 32 bit (Intel)]'

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[issue16382] Better warnings exception for bad category

2013-03-04 Thread Phil Elson


Phil Elson added the comment:

Ok. I think I've done all of the actions from the reviews.

I'm not sure if I should remove the old patches or not?

Thanks,

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[issue17350] Use STAF call python script will case 1124861 issue in 2.7.2 version

2013-03-04 Thread Tomgu


New submission from Tomgu:

Here I get one problem use STAF call python and need help. 
In python 2.7.2 version I write a script test.py as below
###
import subprocess
fileID=file('test1.log','w')
process_response = subprocess.call('netsh wlan show\ 
interface',stdout=fileID,shell=True)
fileID.flush()
fileID.close()
###
It run in windows7 os MSDOS console is OK
and I try to run it in STAF command

C:\ STAF local PROCESS START COMMAND python C:\test.py WAIT STDERRTOSTDOUT 
RETURNSTDOUT

Response

{
  Return Code: 1
  Key: None
  Files  : [
{
  Return Code: 0
  Data   : Traceback (most recent call last):
  File C:\test.py, line 3, in module
process_response = subprocess.call('netsh wlan show interface',stdout=fileID
,shell=True)
  File C:\Python27\lib\subprocess.py, line 493, in call
return Popen(*popenargs, **kwargs).wait()
  File C:\Python27\lib\subprocess.py, line 672, in __init__
errread, errwrite) = self._get_handles(stdin, stdout, stderr)
  File C:\Python27\lib\subprocess.py, line 784, in _get_handles
p2cread = self._make_inheritable(p2cread)
  File C:\Python27\lib\subprocess.py, line 823, in _make_inheritable
_subprocess.DUPLICATE_SAME_ACCESS)
WindowsError: [Error 6] The handle is invalid

}
  ]

Like known issue 1124861. I just start to learn python, I dont know how to 
resolve, need help.

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nosy: gwtking
priority: normal
severity: normal
status: open
title: Use STAF call python script will case 1124861 issue in 2.7.2 version
type: crash
versions: Python 2.7

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[issue17094] sys._current_frames() reports too many/wrong stack frames

2013-03-04 Thread Stefan Ring


Stefan Ring added the comment:

(Regarding your test)
I have also noticed in the past that joining threads after a fork has caused 
hangs occasionally, although that might have resulted from the messed up 
_current_frames.

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[issue15866] encode(..., 'xmlcharrefreplace') produces entities for surrogate pairs


Serhiy Storchaka added the comment:

I prefer a little different (simpler for me) form:

for (p = collstart; p  collend;) {
Py_UCS4 ch = *p++;
if ((0xD800 = ch  ch = 0xDBFF) 
(p  collend) 
(0xDC00 = *p  *p = 0xDFFF)) {
ch = ch  0x03FF)  10) |
   ((Py_UCS4)*p++  0x03FF)) + 0x1);
}
str += sprintf(str, #%d;, (int)ch);
}

And please look at the loop above (determine replacement size). It should be 
corrected too. It will be simpler to use a buffer with static size (``char 
buffer[2+29+1+1];``) as in charmap encoder. Perhaps charmap encoder should be 
fixed too (and common code extracted to separate function).

I doubt about '\ud83d\udc9d' on wide build. Is it right to encode it as 
b'#128157;' and not as b'#55357;#56477;'? This will be compatible with 
narrow build but will break compatibility with 3.3+. What is less evil?

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[issue11787] File handle leak in TarFile lib


Serhiy Storchaka added the comment:

Actually it was fixed in issue16477. ;)

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[issue17346] Pickle tests do not test protocols 0, 1, and 2 for bytes

2013-03-04 Thread Roundup Robot


Roundup Robot added the comment:

New changeset a982feb29584 by Ezio Melotti in branch '3.2':
#17346: make sure pickle tests are run against all protocols.  Initial patch by 
Marius Gedminas.
http://hg.python.org/cpython/rev/a982feb29584

New changeset 796de4f7df07 by Ezio Melotti in branch '3.3':
#17346: merge with 3.2.
http://hg.python.org/cpython/rev/796de4f7df07

New changeset 5c8a5cfe25b0 by Ezio Melotti in branch 'default':
#17346: merge with 3.3.
http://hg.python.org/cpython/rev/5c8a5cfe25b0

New changeset 654136546895 by Ezio Melotti in branch '2.7':
#17346: make sure pickle tests are run against all protocols.
http://hg.python.org/cpython/rev/654136546895

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[issue17346] Pickle tests do not test protocols 0, 1, and 2 for bytes

2013-03-04 Thread Ezio Melotti


Ezio Melotti added the comment:

Fixed, thanks for the report and the patch!

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status: open - closed

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[issue16997] subtests

2013-03-04 Thread Nick Coghlan


Nick Coghlan added the comment:

I think I have figured out what bothers me about the expectedfailure changes, 
and they actually relate to how expectedfailure was implemented in the first 
place: I had previously assumed that decorator was an *annotating* decorator - 
that it set an attribute on the function to indicate it was expected to fail, 
and the test execution machinery then took that into account when deciding how 
to interpret the test result.

The fact that it is instead a *wrapping* decorator is what made the addition of 
subtest support far more complicated than I expected.

However, I'm wondering if it might still be possible to avoid the need for a 
thread local context to handle the combination of expected failures and 
subtests when we have access to the test caseby adding the annotation that I 
expected to be there in the first place. Can't we:

1. Update the expectedfailure decorator to also set _expecting_failure = True 
on the wrapped test case function
2. Update unittest.TestCase.__init__ to do: self._expecting_failure = 
hasattr(testMethod, '__func__') and getattr(testMethod.__func__, 
'_expecting_failure', False)
3. Update unittest._SubTest.__init__ to do: self._expecting_failure = 
test_case._expecting_failure
4. Update testPartExecutor to check if test_case._expecting_failure: instead 
of the current check of the thread local context

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[issue17322] urllib.request add_header() currently allows trailing spaces (and other weird stuff)

2013-03-04 Thread R. David Murray


R. David Murray added the comment:

A crazy idea that occurred to me was to create an rfc822-style-header 
management module, and share it between email, http, and urllib.  We'd 
probably break too many things backward-compatibility wise if we did that, but 
I still think it is an interesting thought :)

On the other hand, having thought about this particular issue some more: in the 
email package we have the constraint of needing to be able to exactly reproduce 
the input data, whereas in the http world that constraint does not apply.  So 
in the http world, given that headers are *already* being transformed by the 
code in question (title casing), it seems reasonable that blank stripping also 
be done, even just from an API standpoint.

Really I guess the only question is how likely this is to break existing code.  
I'm pretty sure it is small enough that doing this in 3.4 would be fine, but I 
don't know how to estimate if it is small enough to also change it in 
maintenance releases.  Since this particular bit is a new standard, maybe we 
just go with 3.4?

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[issue16997] subtests

2013-03-04 Thread Michael Foord


Michael Foord added the comment:

Getting rid of the thread local would be an improvement, and the change to how 
expected failures is done sounds good too.

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[issue13598] string.Formatter doesn't support empty curly braces {}

2013-03-04 Thread Vinay Sajip


Vinay Sajip added the comment:

 I believe the case is covered by the block:
[snip]

Ah, right. I wasn't sure that was the exact same code path that was being 
exercised. But I didn't look very closely.

 If you think it is worthwhile?

Only if it exercises a different code path.

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[issue16997] subtests

2013-03-04 Thread Antoine Pitrou


Antoine Pitrou added the comment:

 However, I'm wondering if it might still be possible to avoid the
 need for a thread local context to handle the combination of
 expected failures and subtests when we have access to the test
 caseby adding the annotation that I expected to be there in the
 first place.

But that would break use cases where you use @expectedFailure on a
function called by the test method, not directly on the test method
itself. I don't really care about those use cases myself, but not
breaking them is the reason I chose not to change the @expectedFailure
implementation. I'll let Michael decide :-)

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[issue10590] Parameter type error for xml.sax.parseString(string, ...)


Serhiy Storchaka added the comment:

Low-level part already extracted to issue17089 and committed. Issue16986 has a 
similar patch for cElementTree. The main part of path was moved to issue2175 
which is now pre-requisite for issue16986 and for this issue. It contains 
additional tests and additional fixes. It is hard and little sense to split 
them on separated patches. Let's move the discussion to issue2175.

And then the patch for this issue will be small and simple, only several lines 
and one test. At least this issue is less important and actually can be 
considered as a new feature.

--
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type: behavior - enhancement
versions:  -Python 3.2, Python 3.3

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[issue10590] Parameter type error for xml.sax.parseString(string, ...)


Changes by Serhiy Storchaka storch...@gmail.com:


Removed file: http://bugs.python.org/file28757/sax_parse.patch

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[issue16986] ElementTree incorrectly parses strings with declared encoding not UTF-8