date:20070826

Steven W. Orr [EMAIL PROTECTED] wrote:
   ...
 =accepts whatever dictionary you give it (so you can, though shouldn't,
 =do strange things such as pass globals()...:-).
 
 In fact, I wanted to make a common routine that could be called from 
 multiple modules. I have classes that need to be created from those 
 multiple modules. I did run into trouble when I created a common routine
 even though I passed globals() as one of the args. The though 
 shouldn't is prompting me to ask why, and where I might be able to read
 more.

The dictionary you pass to new.classobj should be specifically
constructed for the purpose -- globals() will contains all sort of odds
and ends that have nothing much to do with the case.

You appear to be trying to embody lot of black magic in your common
routine, making it communicate with its callers by covert channels; the
way you use globals() to give that routine subtle side effects (making
the routine stick entries there) as well as pass it an opaque,
amorphous, unknown blobs of input information, strongly suggests that
the magic is running away with you (a good general reference about that
is http://video.google.com/videoplay?docid=4611491525028588899).

Explicit is better than implicit, simple is better than complex,
etc, can be read by typing ``import this'' at an interactive Python
prompt.

The best book I know about the do's and don't's of large-scale software
architecture is Lakos' Large-Scale C++ Software Design,
http://www.amazon.com/Large-Scale-Software-Design-John-Lakos/dp/0201633
620 -- very C++ specific, but even though some of the issues only apply
to C++ itself, many of its crucial lessons will help with large scale SW
architecture in just about any language, Python included.

What I had to say about the lures and pitfalls of black magic in Python
specifically is spread through the Python Cookbook 2nd edition (and, to
a lesser extent, Python in a Nutshell).


Alex
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Re: Need a better understanding on how MRO works?

2007-08-26 Thread Steven D'Aprano

On Sun, 26 Aug 2007 07:55:39 -0400, Steven W. Orr wrote:

 In fact, I wanted to make a common routine that could be called from
 multiple modules. I have classes that need to be created from those
 multiple modules. I did run into trouble when I created a common routine
 even though I passed globals() as one of the args.

I'm thinking that you should cross out even though and insert 
because :-)

Perhaps I'm misunderstanding exactly what you're trying to accomplish, 
but if you want to call a routine (a function? class?) from multiple 
modules, the simplest way is the best: create the routine in one module, 
then import it into all the others.

-- 
Steven.
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lisper learning python, ... could you please comment my first python program?

2007-08-26 Thread neptundancer

Hi,
  to extend my skills, I am learning python. I have written small
program which computes math expression like 1+2*sin(y^10)/cos(x*y)
and similar, so far only + - * / ^ sin con tan sqrt are supported. But
my program is quite inextensible, I have to change the code to add new
functions... Could some fellow experienced pythonista give me some
tips how to make my program shorter, and more extensible?

to use it, try something like compute(1+x+sin(x), {x : 10}), the
second param is environment so variables like x or y are looked for
value here...

below is the code thanks for any tips!

- code here 


import sys
import string
import math

def normalize(string):
tmp = .join([c for c in string if c !=  ])
return ( + tmp + )

def most_nested_expression(string):
start = index = 0
end = len(string) - 1
level = max_level = 0
most_nested = False
for c in string:
if c == (:
level += 1
if level  max_level:
most_nested = True
max_level = level
start = index
elif c == ):
level -= 1
if most_nested == True:
most_nested = False
end = index
index += 1
if level != 0:
raise IOError(mismatched parens)
if max_level == 0:
return (0, len(string), string)
else:
return (start + 1, end - start - 1, string[start + 1:end])

def is_reduced_expression(string):
for c in string:
if c == ^ or c == * or c == / or c == + or c == -:
return False
return True

def find_first(string, operators):
positions = []
for op in operators:
pos = string.find(op)
if pos != -1:
positions += [pos]
if positions == []:
return None
else:
return min(positions)

def find_operator(string):
for ops in [[^], [*, /], [+, -]]:
pos = find_first(string, ops)
if pos != None:
if string[pos + 1] == + or string[pos + 1] == -:
return pos + 1
else:
return pos
return None

def left_operand(string, operator_pos):
left = None
operator = string[operator_pos]
candidates = [pos for pos in [string.rfind(op, 0, operator_pos)
  for op in [(, ), ^, *, /,
+, -]]
  if pos != -1]
if candidates != []:
left = max(candidates)
if left == None:
if operator == ^ or operator == * or operator == /:
raise IOError(invalid expression %s % string)
else: # + or -
return (0, operator_pos)
else:
if left + 1 == operator_pos:
if operator == + or operator == -:
return (0, left)
else:
raise IOError(invalid expression %s % string)
else:
return (string[left + 1:operator_pos], left)

def right_operand(string, operator_pos):
right = None
candidates = [pos for pos in [string.find(op, operator_pos + 1)
  for op in [(, ), ^, *, /,
+, -]]
  if pos != -1]
if candidates == []:
if operator_pos == len(string) - 1:
raise IOError(invalid expression %s % string)
else:
return (string[operator_pos + 1:], len(string))
else:
right = min(candidates)
if operator_pos + 1 == right:
raise IOError(invalid expression %s % string)
else:
return (string[operator_pos + 1:right], right)

def function_name(string, left_paren_pos):
candidates = [pos for pos in [string.rfind(op, 0, left_paren_pos)
  for op in [(, ^, *, /, +,
-]]
  if pos != -1]
if candidates == []:
return (None, None)
else:
left = max(candidates)
name = string[left + 1:left_paren_pos]
fun_names = [sin, cos, tan, sqrt]

for f in fun_names:
if f == name:
return (left + 1, name)
return (None, None)

def reduce_step(string, index):
(left, exp_len, exp) = most_nested_expression(string)
#print most nested %s % exp
if is_reduced_expression(exp):
(left1, name) = function_name(string, left - 1)
if left1 != None:
return ((name, string[left:left + exp_len], None),
string[0:left1] + $%s % index + string[left +
exp_len + 1:],
True)
else:
return ((None, None, None), string[0:left - 1] + exp +
string[left + exp_len + 1:], False)
else:
operator_pos = find_operator(exp) + left
(left_op, left_mark) = left_operand(string, operator_pos)
(right_op, right_mark) = right_operand(string, operator_pos)
return ((string[operator_pos], left_op, right_op),
string[0:left_mark + 1] + $%s % index +
string[right_mark:],
True)

def reduce(string):
chain = []

ANN: PyPE 2.8.6

2007-08-26 Thread Josiah Carlson


=== What is PyPE? ===
PyPE (Python Programmers' Editor) was written in order to offer a
lightweight but powerful editor for those who think emacs is too much
and idle is too little. Syntax highlighting is included out of the box,
as is multiple open documents via tabs.

Beyond the basic functionality, PyPE offers an expandable source tree,
filesystem browser, draggable document list, todo list, filterable
function list, find and replace bars (no dialog to find or replace simple
strings), recordable and programmable macros, spell checker,
reconfigurable menu hotkeys, triggers, find in files, external process
shells, and much more.

=== More Information ===

If you would like more information about PyPE, including screenshots,
where to download the source or windows binaries, bug tracker, contact
information, or a somewhat complete listing of PyPE's features, visit
PyPE's home on the web:

http://pype.sf.net/index.shtml

If you have any questions about PyPE, please contact me, Josiah Carlson,
aka the author of PyPE, at jcarlson at uci.edu (remember to include
PyPE in the subject).


PyPE 2.8.6 includes the following changes and bugfixes since release
2.8.5:

(fixed) a bug with Wrap Try/Except as per emailed bug report from Ian York.
(added) ability to choose what port PyPE will listen on via --port= .
(fixed) workspaces in wxPython 2.8+, patch thanks to Craig Mahaney.
(added) explicit exclude dirs for find in files, patch thanks to Craig Mahaney.
(added) paste and down mechanism to paste and move the cursor down, patch
thanks to Craig Mahaney.
(added) delete right mechanism to delete everything from the cursor to the end
of the line, patch thanks to Craig Mahaney.
(added) delete line mechanism to delete the current line, patch thanks to
Craig Mahaney.
(added) paste rectangle command for rectangular pasting, patch thanks to Craig
Mahaney.
(fixed) support for alternate background colors thanks to bug report from
Craig Mahaney.
(added) macro support to Craig Mahaney's added functionality.
(added) implementation for regular expression replacements, possibly to be
integrated as part of a 'replace in all open documents' in the future.
(added) automatic spellcheck for text and tex documents of up to 200,000 byes
in size.  Will only spellcheck if the user has enabled check syntax in the
Realtime Options.
(fixed) issue when trying to save language settings when cursor position is
not to be saved.
(added) support for \chapter section delimiter in *tex files.
(fixed) issue that prevented the highest level source listing from being
sorted in the Name and Line sorted source trees.
(changed) rather than reading and executing a file for configuration loading,
we now use a variant of the 'unrepr()' mechanism with support for True/False.
(changed) find/replace bar now uses variant of 'unrepr()' rather than the
compiler module directly.
(changed) moved parsers.py to plugins and stopped using import * to get its
contents.

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Re: lisper learning python, ... could you please comment my first python program?

2007-08-26 Thread Steven D'Aprano

On Sun, 26 Aug 2007 15:56:08 +, neptundancer wrote:

 Hi,
   to extend my skills, I am learning python. I have written small
 program which computes math expression like 1+2*sin(y^10)/cos(x*y) and
 similar, so far only + - * / ^ sin con tan sqrt are supported. But my
 program is quite inextensible, I have to change the code to add new
 functions... Could some fellow experienced pythonista give me some tips
 how to make my program shorter, and more extensible?

Just a few comments at random. This is certainly not meant to be 
exhaustive:


 def normalize(string):
 tmp = .join([c for c in string if c !=  ]) 
 return ( + tmp + )

Try this instead:

def normalize(astring):
return ( + astring.replace( , ) + )



 def most_nested_expression(string):
[snip code]
 if level != 0:
 raise IOError(mismatched parens)

You raise IOError quite often, but that's a misuse of it. IOError is a 
subclass of EnvironmentError, and is meant to indicate (e.g.) a failed 
read from a disk.

If you execute help(IOError) at the interactive prompt, you will see:

class IOError(EnvironmentError)
 |  I/O operation failed.


I suggest a better exception to use would be ValueError, or even create 
your own:

class MyCustomError(ValueError):
pass

would be a minimal example.




 def is_reduced_expression(string):
 for c in string:
 if c == ^ or c == * or c == / or c == + or c == -:
 return False
 return True

Change that to:

for c in string:
if c in ^*/+-: return False
return True


[snip]


 def add(a, b): return a + b
 def sub(a, b): return a - b
 def mul(a, b): return a * b
 def div(a, b): return a / b

Replace the above four functions with:

from operator import add, sub, mul
from operator import truediv as div



 def translate_function(fn_str):
 if fn_str == +: return add
 elif fn_str == -: return sub
 elif fn_str == *: return mul
 elif fn_str == /: return div
 elif fn_str == ^: return math.pow
 elif fn_str == sin: return math.sin elif fn_str == cos: return
 math.cos elif fn_str == tan: return math.tan elif fn_str ==
 sqrt: return math.sqrt else: raise IOError(unknown function %s %
 fn_str)


fn_map = {+: add, -: sub, *: mul, /: div, 
^: math.pow, sin: math.sin } # etc.

def translate_function(fn_str):
try:
return fn_map[fn_str]
except KeyError:
raise ValueError(unknown function '%s' % fn_str)


Hope that helps.


-- 
Steven.
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New UI Toolkit

2007-08-26 Thread Gerdus van Zyl

Hi

I am halfway to a first release of a new GUI library for python. It
will be cross platform and follows the Swing philosophy of user
experience and interface fidelity above but it doesn't look like
windows! (aside: neither does office 2007 or windowsmediaplayer).

The library is built on top of CairoGraphics (cairographics.org) and
currently has a rather stable backend for Win32 and experimental
backends for GTK,Pyglet,pygame.

I am also busy with an WYSIWYG designer ala visualstudio but have yet
to decide on an serializable format leaning towards xul-alike without
XBL.

You can see a screenshot here: http://infireal.com/external/gradripper.png
and a executable of a utility built using here: http://www.infireal.com/alpha
(generates cairo/svg gradients from images)

Please reply and let your thoughts be known. Is there a need for a new
GUI library for python?

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Re: lisper learning python, ... could you please comment my first python program?

2007-08-26 Thread neptundancer

Thanks a lot for comments! I am going to fix the source according to
your advices ;)

Nep

On Aug 26, 6:32 pm, Steven D'Aprano [EMAIL PROTECTED]
THIScybersource.com.au wrote:
 On Sun, 26 Aug 2007 15:56:08 +, neptundancer wrote:
  Hi,
to extend my skills, I am learning python. I have written small
  program which computes math expression like 1+2*sin(y^10)/cos(x*y) and
  similar, so far only + - * / ^ sin con tan sqrt are supported. But my
  program is quite inextensible, I have to change the code to add new
  functions... Could some fellow experienced pythonista give me some tips
  how to make my program shorter, and more extensible?

 Just a few comments at random. This is certainly not meant to be
 exhaustive:

  def normalize(string):
  tmp = .join([c for c in string if c !=  ])
  return ( + tmp + )

 Try this instead:

 def normalize(astring):
 return ( + astring.replace( , ) + )



  def most_nested_expression(string):
 [snip code]
  if level != 0:
  raise IOError(mismatched parens)

 You raise IOError quite often, but that's a misuse of it. IOError is a
 subclass of EnvironmentError, and is meant to indicate (e.g.) a failed
 read from a disk.

 If you execute help(IOError) at the interactive prompt, you will see:

 class IOError(EnvironmentError)
  |  I/O operation failed.

 I suggest a better exception to use would be ValueError, or even create
 your own:

 class MyCustomError(ValueError):
 pass

 would be a minimal example.

  def is_reduced_expression(string):
  for c in string:
  if c == ^ or c == * or c == / or c == + or c == -:
  return False
  return True

 Change that to:

 for c in string:
 if c in ^*/+-: return False
 return True

 [snip]

  def add(a, b): return a + b
  def sub(a, b): return a - b
  def mul(a, b): return a * b
  def div(a, b): return a / b

 Replace the above four functions with:

 from operator import add, sub, mul
 from operator import truediv as div

  def translate_function(fn_str):
  if fn_str == +: return add
  elif fn_str == -: return sub
  elif fn_str == *: return mul
  elif fn_str == /: return div
  elif fn_str == ^: return math.pow
  elif fn_str == sin: return math.sin elif fn_str == cos: return
  math.cos elif fn_str == tan: return math.tan elif fn_str ==
  sqrt: return math.sqrt else: raise IOError(unknown function %s %
  fn_str)

 fn_map = {+: add, -: sub, *: mul, /: div,
 ^: math.pow, sin: math.sin } # etc.

 def translate_function(fn_str):
 try:
 return fn_map[fn_str]
 except KeyError:
 raise ValueError(unknown function '%s' % fn_str)

 Hope that helps.

 --
 Steven.


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Re: New UI Toolkit

2007-08-26 Thread Lawrence Oluyede

Gerdus van Zyl [EMAIL PROTECTED] wrote:
 Please reply and let your thoughts be known. Is there a need for a new
 GUI library for python?

I think there's no real point in answering this question. You developed
a new toolkit because, I'm guessing, you are not fully satisfied by the
current ones. In my personal opinion there's no *need* for another
toolkit but there is *room* for one, two, hundreds of new toolkits.
That's what freedom is for.

:-)

-- 
Lawrence, oluyede.org - neropercaso.it
It is difficult to get a man to understand 
something when his salary depends on not
understanding it - Upton Sinclair
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Re: lisper learning python, ... could you please comment my first python program?

2007-08-26 Thread Michele Simionato

On Aug 26, 5:56 pm, [EMAIL PROTECTED] wrote:
 Hi,
   to extend my skills, I am learning python. I have written small
 program which computes math expression like 1+2*sin(y^10)/cos(x*y)
 and similar, so far only + - * / ^ sin con tan sqrt are supported. But
 my program is quite inextensible, I have to change the code to add new
 functions... Could some fellow experienced pythonista give me some
 tips how to make my program shorter, and more extensible?

I understand that you are doing this as a learning exercise. Still, I
would
recommend you to have a look at the shlex module in the standard
library
and to pyparsing. Looking at their source code should should give you
some
idea. BTW, since you are familiar with Lisp, I would recommend you
IPython
for a better interactive experience.

  Michele Simionato

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Re: lisper learning python, ... could you please comment my first python program?

2007-08-26 Thread [EMAIL PROTECTED]

Michele Simionato wrote:
 On Aug 26, 5:56 pm, [EMAIL PROTECTED] wrote:
  Hi,
to extend my skills, I am learning python. I have written small
  program which computes math expression like 1+2*sin(y^10)/cos(x*y)
  and similar, so far only + - * / ^ sin con tan sqrt are supported. But
  my program is quite inextensible, I have to change the code to add new
  functions... Could some fellow experienced pythonista give me some
  tips how to make my program shorter, and more extensible?

 BTW, since you are familiar with Lisp, I would recommend you
 IPython for a better interactive experience.

IPython's got great support for saving and using old results and a lot
of other things.  It's borderline unreadable for stack traces out of
the box, though; putting xtrace Plain in your ipythonrc helps a
lot.  The color options (either turning it off or making it light/dark
background appropriate) are also quite important to having it at all
usable; depending on your default bg color that may not be an issue.
And if you want to have a view of your data that's similar to the rest
of the Python world (useful if you ever intend for others to look at
your output or you to look at theirs), pprint 0 is nice too.

Sorry if that sounds like it's an indictment--it's a very nice shell
aside from a few output weirdnesses that are easily configured.

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Re: lisper learning python, ... could you please comment my first python program?

2007-08-26 Thread neptundancer

On Aug 26, 7:40 pm, Michele Simionato [EMAIL PROTECTED]
wrote:
 On Aug 26, 5:56 pm, [EMAIL PROTECTED] wrote:

  Hi,
to extend my skills, I am learning python. I have written small
  program which computes math expression like 1+2*sin(y^10)/cos(x*y)
  and similar, so far only + - * / ^ sin con tan sqrt are supported. But
  my program is quite inextensible, I have to change the code to add new
  functions... Could some fellow experienced pythonista give me some
  tips how to make my program shorter, and more extensible?

 I understand that you are doing this as a learning exercise. Still, I
 would
 recommend you to have a look at the shlex module in the standard
 library
 and to pyparsing. Looking at their source code should should give you
 some
 idea. BTW, since you are familiar with Lisp, I would recommend you
 IPython
 for a better interactive experience.

   Michele Simionato

thanks for the tip! Now I have IPython working nicely. The shell now
looks a little like Christmas tree but I think it can be reduced a
bit ;)
the ?var and auto completion is exactly what I was looking for!

Nep

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Re: New UI Toolkit

2007-08-26 Thread tool69

Gerdus van Zyl a écrit :

Seems very promising.

But I'm afraid with the Swing-like interface, i.e : did you use the same 
  widget positionning ?
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the del function

2007-08-26 Thread Lamonte Harris

import random
constant_array = 
red = blue = grey = black = 0
r1 = r2 = r3 = r4 = 1
blu1 = blu2 = blu3 = blu4 = 2
g1 = g2 = g3 = g4 = 3
bla1 = bla2 = bla3 = bla4 = 4
single_players =
[r1,r2,r3,r4,blu1,blu2,blu3,blu4,bla1,bla2,bla3,bla4,g1,g2,g3,g4]
_red = [1,1,1,1]
#print random.randint(0,10
#red team
x = 0
while x  4:
array = single_players[4:17]
length = len(array) - 1
ray = random.randint(0,length)
_red[x] = array[ray]
del array[ray]
print array
x = x + 1
print _red

Ok I'm working on a game function where at the end of the game it remix's
the teams.

For some odd reason the del array[ray] isn't actually deleting the array
item in the list I get the following output:

C:\Documents and Settings\program\Desktop\python\pygameremix.py
[2, 2, 2, 4, 4, 4, 4, 3, 3, 3, 3]
[2, 2, 2, 4, 4, 4, 4, 3, 3, 3, 3]
[2, 2, 2, 2, 4, 4, 4, 3, 3, 3, 3]
[2, 2, 2, 2, 4, 4, 4, 3, 3, 3, 3]
[2, 2, 4, 4]

The _red function is fine, but the del function isn't working.  What did I
do wrong?
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Re: Joining Big Files

2007-08-26 Thread mcl

On 26 Aug, 15:45, vasudevram [EMAIL PROTECTED] wrote:
 On Aug 26, 6:48 am, Paul McGuire [EMAIL PROTECTED] wrote:



  On Aug 25, 8:15 pm, Paul McGuire [EMAIL PROTECTED] wrote:

   On Aug 25, 4:57 am,mosscliffe[EMAIL PROTECTED] wrote:

I have 4 text files each approx 50mb.

   yawn 50mb? Really?  Did you actually try this and find out it was a
   problem?

   Try this:
   import time

   start = time.clock()
   outname = temp.dat
   outfile = file(outname,w)
   for inname in ['file1.dat', 'file2.dat', 'file3.dat', 'file4.dat']:
   infile = file(inname)
   outfile.write( infile.read() )
   infile.close()
   outfile.close()
   end = time.clock()

   print end-start,seconds

   For 4 30Mb files, this takes just over 1.3 seconds on my system.  (You
   may need to open files in binary mode, depending on the contents, but
   I was in a hurry.)

   -- Paul

  My bad, my test file was not a text file, but a binary file.
  Retesting with a 50Mb text file took 24.6 seconds on my machine.

  Still in your working range?  If not, then you will need to pursue
  more exotic approaches.  But 25 seconds on an infrequent basis does
  not sound too bad, especially since I don't think you will really get
  any substantial boost from them (to benchmark this, I timed a raw
  copy command at the OS level of the resulting 200Mb file, and this
  took about 20 seconds).

  Keep it simple.

  -- Paul

 There are (at least) another couple of approaches possible, each with
 some possible tradeoffs or requirements:

 Approach 1. (Least amount of code to write - not that the others are
 large :)

 Just use os.system() and the UNIX cat command - the requirement here
 is that:
 a) your web site is hosted on *nix (ok, you can do it if on Windows
 too - use copy instead of cat, you might have to add a cmd /c 
 prefix in front of the copy command, and you have to use the right
 copy command syntax for concatenating multiple input files into one
 output file).

 b) your hosting plan allows you to execute OS level commands like cat,
 and cat is in your OS PATH (not PYTHONPATH). (Similar comments apply
 for Windows hosts).

 import os
 os.system(cat file1.txt file2.txt file3.txt file4.txt 
 file_out.txt)

 cat will take care of buffering, etc. transparently to you.

 Approach 2: Read (in a loop, as you originally thought of doing) each
 line of each of the 4 input files and write it to the output file:

 (Reusing Paul McGuire's code above:)

 outname = temp.dat
 outfile = file(outname,w)
 for inname in ['file1.dat', 'file2.dat', 'file3.dat', 'file4.dat']:
 infile = file(inname)
 for lin in infile:
 outfile.write(lin)
 infile.close()
 outfile.close()
 end = time.clock()

 print end-start,seconds

 # You may need to check that newlines are not removed in the above
 code, in the output file.  Can't remember right now. If they are, just
 add one back with:

 outfile.write(lin + \n) instead of  outfile.write(lin) .

 ( Code not tested, test it locally first, though looks ok to me. )

 The reason why this _may_ not be much slower than manually coded
 buffering approaches, is that:

 a) Python's standard library is written in C (which is fast),
 including use of stdio (the C Standard IO library, which already does
 intelligent buffering)
 b) OS's do I/O buffering anyway, so do hard disk controllers
 c) from some recent Python version, I think it was 2.2, that idiom
 for lin in infile has been (based on somethng I read in the Python
 Cookbook) stated to be pretty efficient anyway (and yet (slightly)
 more readable that earlier followed approaches of reading a text
 file).

 Given all the above facts, it probably isn't worth your while to try
 and optimize the code unless and until you find (by measurements) that
 it's too slow - which is a good practice anyway:

 http://en.wikipedia.org/wiki/Optimization_(computer_science)

 Excerpt from the above page (its long but worth reading, IMO):

 Donald Knuth said, paraphrasing Hoare[1],

 We should forget about small efficiencies, say about 97% of the time:
 premature optimization is the root of all evil. (Knuth, Donald.
 Structured Programming with go to Statements, ACM Journal Computing
 Surveys, Vol 6, No. 4, Dec. 1974. p.268.)

 Charles Cook commented,

 I agree with this. It's usually not worth spending a lot of time
 micro-optimizing code before it's obvious where the performance
 bottlenecks are. But, conversely, when designing software at a system
 level, performance issues should always be considered from the
 beginning. A good software developer will do this automatically,
 having developed a feel for where performance issues will cause
 problems. An inexperienced developer will not bother, misguidedly
 believing that a bit of fine tuning at a later stage will fix any
 problems. [2]
 

 HTH
 Vasudev
 -
 Vasudev 
 Ramhttp://www.dancingbison.comhttp://jugad.livejournal.comhttp://sourceforge.net/projects/xtopdf

Re: New UI Toolkit

2007-08-26 Thread Gerdus van Zyl


 But I'm afraid with the Swing-like interface, i.e : did you use the same
   widget positionning ?

Not sure what you mean, but each parent widget is responsible for
rendering and positioning the children. Can use layout managers, two
currently absolute and simple flow. ( In the screenshot, the gradients
are in a flow panel)

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pySerial in a daemon process

2007-08-26 Thread paul

I am writing a daemon process that reads data from the serial port /
dev/ttyS0.  I am using pyserial  the method for setting up a daemon
described in Chris' Python Page (http://homepage.hispeed.ch/py430/
python/) on an Ubuntu linux pc.

Everything works great EXCEPT...

in the daemon script, there are two lines to change the uid  gid that
the script runs as:
os.setegid(10)
os.seteuid(1000)

If I comment these out, so that the daemon runs as root, then
everything works fine.  I can also manually run the script that the
daemon process kicks off from my own id just fine.

If I put these back in and try to run the daemon, the script fails
when I try to connect to the serial port, with this error:
serial.serialutil.SerialException: Could not open port: [Errno 13]
Permission denied: '/dev/ttyS0'

In my debugging I have tried setting the uid to my own uid, and the
gid to a variety of different groups that I belong to.  None of them
work.

I could certainly run the daemon as root, but I would rather not.
What really confuses me is that if I manually run the script as myself
(without using the daemon script), it connects fine, but when root
uses os.seteuid() to my uid, it fails.

What do I need to do to get this to work?

Many thanks,

Paul

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Re: Parser Generator?

2007-08-26 Thread Jason Evans

On Aug 24, 1:21 pm, Jack [EMAIL PROTECTED] wrote:
 Jason Evans [EMAIL PROTECTED] wrote in message
 http://www.canonware.com/Parsing/

 Thanks Jason. Does Parsing.py support Unicode characters (especially CJK)?
 I'll take a look.

Parsers typically deal with tokens rather than individual characters,
so the scanner that creates the tokens is the main thing that Unicode
matters to.  I have written Unicode-aware scanners for use with
Parsing-based parsers, with no problems.  This is pretty easy to do,
since Python has built-in support for Unicode strings.

Jason

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Re: pySerial in a daemon process

2007-08-26 Thread Bjoern Schliessmann

paul wrote:

 If I put these back in and try to run the daemon, the script fails
 when I try to connect to the serial port, with this error:
 serial.serialutil.SerialException: Could not open port: [Errno 13]
 Permission denied: '/dev/ttyS0'

Did you check the permissions on this file? Often you have to be
member of a dialout group or similar to get access.

Regards,


Björn

-- 
BOFH excuse #172:

pseudo-user on a pseudo-terminal

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Re: Debugging a curses application in python

2007-08-26 Thread [EMAIL PROTECTED]

Just to let anyone know who runs across this post, winpdb from (http://
www.digitalpeers.com/pythondebugger/) solved my issue.

--Chris

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Re: New UI Toolkit

2007-08-26 Thread Richard Jones

Gerdus van Zyl wrote:
 I am halfway to a first release of a new GUI library for python. It
 will be cross platform and follows the Swing philosophy of user
 experience and interface fidelity above but it doesn't look like
 windows! (aside: neither does office 2007 or windowsmediaplayer).
 
 The library is built on top of CairoGraphics (cairographics.org) and
 currently has a rather stable backend for Win32 and experimental
 backends for GTK,Pyglet,pygame.

I am also developing a gui toolkit (for somewhat similar reasons to you,
though unrelated to Swing) but it's for pyglet only. If you're interested,
you can find it in the pyglet SVN under contrib/wydget. It's under heavy
development and is fairly advanced (in terms of widgets, layouts, dialogs
etc implemented) already.


 Please reply and let your thoughts be known. Is there a need for a new
 GUI library for python?

Clearly you felt there was :)


Richard

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Re: pySerial in a daemon process

2007-08-26 Thread paul

On Aug 26, 5:20 pm, Bjoern Schliessmann usenet-
[EMAIL PROTECTED] wrote:
 paul wrote:
  If I put these back in and try to run the daemon, the script fails
  when I try to connect to the serial port, with this error:
  serial.serialutil.SerialException: Could not open port: [Errno 13]
  Permission denied: '/dev/ttyS0'

 Did you check the permissions on this file? Often you have to be
 member of a dialout group or similar to get access.

 Regards,

 Björn

 --
 BOFH excuse #172:

 pseudo-user on a pseudo-terminal


THANKS! That did it, but perhaps can you explain to me why...

Before I had posted this question first thing I did was to look at /
dev/ttyS0, and indeed the group is dialout (gid=20), so I tried a
couple of things:

1. checked my id to see if I was a member of dialout, and indeed I
am.  So, I edited the daemon script to use my id and set the gid to
dialout (ie: os.setegid(20)  os.seteuid(1000)) and it still failed.

2. made the id I really want to use (pydaemon, uid=110) a member of
dialout, and set the daemon script to use those (ie: os.setegid(20) 
os.seteuid(110)) and it still failed...

After reading your comment, I went and did a chgrp to set the various
script file groups to dialout, and indeed it now works.  What confuses
me is that if the script needed that group, why doesn't the setegid or
seteuid fail?  Why does the script keep running okay until the
connect, and fail then?

Thanks!

Paul

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Re: my parser.py isn't imported

2007-08-26 Thread John Machin

On Aug 27, 1:36 am, Torsten Bronger [EMAIL PROTECTED]
wrote:
 Hallöchen!

 I have a module parser.py in the same directory as the main module.
 In the main module, I import parser.  On Linux, this works as
 expected, however on Windows, it imports the stdlib parser module.
 sys.path[0] points to the directory of my parser.py in both cases.
 What went wrong here?

Ask a literal question, get a literal answer :-)

1. Failure to consider that problems can happen [and therefore will
happen [1]] when there are multiple entities with the same name.

2. Failure to RTFabulousM:

Details of the module searching and loading process are implementation
and platform specific. It generally involves searching for a ``built-
in'' module with the given name and then searching a list of locations
given as sys.path.


3. Failure to attempt enlightenment by using the -v option:

import parser # builtin

(on Windows)

Suggestion: Avoid the confusion. Rename your module. If it is actually
intended as a replacement for the builtin one, then you can do:
   import replacementparser as parser

[1] Codex Murphius, circa 5000 BCE

HTH,
John

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Re: my parser.py isn't imported

2007-08-26 Thread Torsten Bronger

Hallöchen!

John Machin writes:

 On Aug 27, 1:36 am, Torsten Bronger [EMAIL PROTECTED]
 wrote:

 I have a module parser.py in the same directory as the main
 module.  In the main module, I import parser.  On Linux, this
 works as expected, however on Windows, it imports the stdlib
 parser module.  sys.path[0] points to the directory of my
 parser.py in both cases.  What went wrong here?

 Ask a literal question, get a literal answer :-)

 1. Failure to consider that problems can happen [and therefore
 will happen [1]] when there are multiple entities with the same
 name.

So I'd like to know a means to tell *explicitly* what I want to
import.  Maybe I could use the imp module but that's ugly.  I mean,
there are hundreds of modules on my harddisk, so trying to avoid
nameclashs should not be the solution, and given ...

 2. Failure to RTFabulousM:
 
 Details of the module searching and loading process are
 implementation and platform specific. It generally involves
 searching for a ``built- in'' module with the given name and then
 searching a list of locations given as sys.path.
 

... the whole systems seems largely arbitrary, which I don't
believe.  ;-)

parser is built-in on Windows but not on Linux.  What's the list
of modules that *may* be built-in on some platform or
implementation?  Or should I avoid the whole standard lib for names
of my modules?  Or even everything which is shipped e.g. with
Enthought Python?  I find this quite irritating.

Tschö,
Torsten.

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Re: YOU MUST KNOW THIS MAN

2007-08-26 Thread James Stroud

Would Muhammad, peace and blessings be upon him, want his followers to 
kill in his name? I know that other prophets would not.
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Re: Parser Generator?

2007-08-26 Thread Jack

Good to know, thanks Paul.
!
Paul McGuire [EMAIL PROTECTED] wrote in message

 Pyparsing was already mentioned once on this thread.  Here is an
 application using pyparsing that parses Chinese characters to convert
 to English Python.

 http://pypi.python.org/pypi/zhpy/0.5

 -- Paul 


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SCF (Python Smar Card Framework)

Dear all,

I am releasing much of my work including SCF (Cross platform Smart Card 
library  Tools) to the GPL license.

If interested, go to http://www.SnakeCard.com/Source.html

I am moving the doc to doxygen and cleaning up the code, so what you'll 
see there will change in the course of the next few weeks - basically 
can only get meaningful info on the classes hierarchy at this stage.
I am looking for a free subversion server resource to put the code ... 
if you know of any.

Some of the work there will be windows-only related (GINA, activeX 
components ...) and the applets JavaCard and BasicCard ... I'm releasing 
these during the next few days.

Regards,

Philippe
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Re: SCF (Python Smar Card Framework)

2007-08-26 Thread Paul Rubin

hg [EMAIL PROTECTED] writes:
 I am releasing much of my work including SCF (Cross platform Smart
 Card library  Tools) to the GPL license.
 
 If interested, go to http://www.SnakeCard.com/Source.html

Wow, that is great.  I haven't found any low cost programmable cards
(no large quantity purchases or developer licenses needed) other than
BasicCard which has some annoying limitations.  Do you have any
suggestions?  Thanks!

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Re: Parser Generator?

2007-08-26 Thread Jack

Thanks Json. There seem to be a few options that I can pursue. Having a hard 
time
chooing one now :)

Jason Evans [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 On Aug 24, 1:21 pm, Jack [EMAIL PROTECTED] wrote:
 Jason Evans [EMAIL PROTECTED] wrote in message
 http://www.canonware.com/Parsing/

 Thanks Jason. Does Parsing.py support Unicode characters (especially 
 CJK)?
 I'll take a look.

 Parsers typically deal with tokens rather than individual characters,
 so the scanner that creates the tokens is the main thing that Unicode
 matters to.  I have written Unicode-aware scanners for use with
 Parsing-based parsers, with no problems.  This is pretty easy to do,
 since Python has built-in support for Unicode strings.

 Jason
 


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Re: SCF (Python Smar Card Framework)

Paul Rubin wrote:
 hg [EMAIL PROTECTED] writes:
 I am releasing much of my work including SCF (Cross platform Smart
 Card library  Tools) to the GPL license.

 If interested, go to http://www.SnakeCard.com/Source.html
 
 Wow, that is great.  I haven't found any low cost programmable cards
 (no large quantity purchases or developer licenses needed) other than
 BasicCard which has some annoying limitations.  Do you have any
 suggestions?  Thanks!
 

How about you post that on the forum I just opened ... we're going to 
get killed here ;-)

hg
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Re: ActiveRecord for Python/MySQL

2007-08-26 Thread Luis M . González

On Aug 26, 5:52 am, Devraj [EMAIL PROTECTED] wrote:
 Thanks

 On Aug 26, 5:26 pm, EuGeNe Van den Bulke

 [EMAIL PROTECTED] wrote:
  Devraj wrote:
   My application uses MySQL as a backend and am using the MySQL/Python
   bindings. Are there any libraries that provide a database abstraction
   layer like Activerecords for Python?'

  SQLObject
  SQLAclhemy
  DejaVu
  Storm

  Google for Python ORM you may find more!

  EuGeNe --http://www.3kwa.com


If you want an ActiveRecord -like experience with SQLAlchemy, you can
use the extension Elixir on top of it.

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Re: Co-developers wanted: document markup language

 virtually the only ones that feel the need to rub our nationality into

I'd always assumed (I never spent much time) that Germans were
another culture that had the habit of greeting groups on entrance.

Australians, English, and most of North America just don't have
that habit.

Steve.

Wildemar Wildenburger [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 Torsten Bronger wrote:
 Hallöchen!


 Yes, you're German. Have you ever noticed that (we) Germans are virtually 
 the only ones that feel the need to rub our nationality into everyones 
 faces? ;)


 Paul Rubin writes

 TeX/LateX have been around forever and are well established
 standards, as awful as they are.  Why do we want ANOTHER markup
 language?

 Well, because they are awful.  ;-)  I don't see that there is a
 bunch of already existing projects, in fact, I don't see anyone
 challenging LaTeX at all.  However, competition is a good thing, and
 I think there are enough aspects about LaTeX that can be done better
 so that this project is worth being done.

 Well there is ConTeXt URL:http://wiki.contextgarden.net/. I've never 
 actually used it, but from reading the docs I deem it a very attractive 
 alternative to LaTeX.

 /W 


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RE: Using Regular Expresions to change .htm to .php in files

2007-08-26 Thread Ryan Ginstrom

 On Behalf Of Mark
 This line should be:
 
 sed s/\.htm$/.php/g  $each  /tmp/$$

I think a more robust way to go about this would be:

(1) Use os.walk to walk through the directory
   http://docs.python.org/lib/os-file-dir.html

(2) Use Beautiful Soup to extract the internal links from each file
   http://crummy.com/software/BeautifulSoup/documentation.html

from BeautifulSoup import BeautifulSoup

soup = BeautifulSoup(doc)
links = soup('a')
internal_links = [link[href]
for link in links
if link.has_key(href) and not
link[href].startswith(http)]

(4) Do straight string replacements on those links (no regex needed)

(5) Save each html file to *.html.bak before changing


Regards,
Ryan Ginstrom

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RE: Parser Generator?

2007-08-26 Thread Ryan Ginstrom

 On Behalf Of Jason Evans
 Parsers typically deal with tokens rather than individual 
 characters, so the scanner that creates the tokens is the 
 main thing that Unicode matters to.  I have written 
 Unicode-aware scanners for use with Parsing-based parsers, 
 with no problems.  This is pretty easy to do, since Python 
 has built-in support for Unicode strings.

The only caveat being that since Chinese and Japanese scripts don't
typically delimit words with spaces, I think you'd have to pass the text
through a tokenizer (like ChaSen for Japanese) before using PyParsing.

Regards,
Ryan Ginstrom

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Re: beginner, idiomatic python

That looks good, and perhaps a difference operator
would be too simple to be useful anyway.

Steve.

Mikael Olofsson [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]


 bambam wrote:

 In this case it doesn't matter - my lists don't contain
 duplicate elements this time - but I have worked with lists in
 money market and in inventory, and finding the intersection
 and difference for matching off and netting out are standard
 operations.

 I would use a list comprehension for that case:

 A = ['a','b','c','a','c','d']
 U = ['a','b','e']
 B = [x for x in A if x in U]

 The result would be B==['a','b','a']

 /MiO 


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Re: beginner, idiomatic python


c = sorted(set(a)-set(b))

although for me :~( that is another step more obscure than

c = list(set(a)-set(b))
c.sort()

Bags don't seem to be built in to my copy of Python, and
although I'm interested in why lists don't support the difference
operation, I don't want to get away from standard Python.

Steve.

Scott David Daniels [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 bambam wrote:
 The reason that lists don't have set-like methods is because
 lists aren't sets -- lists can contain duplicate elements
 and they are ordered.  I'd have used sets if I was sure you
 meant [1,2,3] to mean the same thing as [3,1,2] and no duplicates.

 Interesting point -- if that's all there is in it, then lists should
 have difference and intersection methods. Not because they
 are the same as sets -- because they are slightly different than
 sets. In this case it doesn't matter - my lists don't contain
 duplicate elements this time - but I have worked with lists in
 money market and in inventory, and finding the intersection
 and difference for matching off and netting out are standard
 operations.
 Here you seem to be talking about multisets (also called bags).
 They have more fully defined algebraic properties analogous to sets.

 bag([1,2,3,3,4]) == bag([3,1,2,4,3]) != bag([1,2,3,4])
 bag([1,2,2,3]) - bag([1,2]) == bag([2,3])
 bag([1,2,3]) - bag([3,4]) == bag([1])

 Excellent. By symmetry, I see that list casts the set back into a 
 list.
 Some will say 'sorted' is a better conversion of a set to list, since
 the result is well-defined.

 --Scott David Daniels
 [EMAIL PROTECTED] 


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Re: beginner, idiomatic python

Ok, many environments are capable of cached evaluation
of functions without variable parameters so
range(5)
is cached, but
range(v) is re-evaluated every time. Is this defined
behaviour?

That is, is it defined what Python does for
for i in f()
I'm sure it must be, but I haven't seen it yet. If I have
a user defined function returning a range, is it defined
that the range function is called on every loop? If I
have a function returning a range taking a parameter,
for i in f(v)
is it defined that the variable is evaluated for every loop?

Steve.


Paul McGuire [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 On Aug 23, 11:50 pm, bambam [EMAIL PROTECTED] wrote:
 Thank you, so generallizing:

 (1) Python re-evaluates the loop range on every loop, and
 (2) Python does short-circuit evaluation of conditions, in predictable
 order.

 Sorry about the bad question.


 A beginner would do well to work through the Python Tutorial (http://
 docs.python.org/tut/tut.html).  I think your first insight is
 actually incorrect, if I understand your wording.  If I wrote:

 for i in range(10):
# do something with i

 I'm quite certain that range(10) is not evaluated on every
 loop iteration.  In fact, the range call generates a list containing
 the values [0, 1, 2, ..., 9], and then for iterates over this
 list.  You can read this at 
 http://docs.python.org/tut/node6.html#SECTION00630.

 On the other hand, if you are talking about a while loop, of course
 the condition is evaluated on every loop - otherwise such a loop, once
 entered, would never exit.

 Your second generalization is stated pretty plainly in
 http://docs.python.org/tut/node7.html#SECTION00770.
 In fact, conditional short-circuiting is a consistent theme in most
 Python functions and structures.  The new any() and all() built-ins in
 Python 2.5 for example, evaluate a list of values for their boolean
 True/False-ness, any() returning True if any list entry is True,
 otherwise False; and all() returning True if all entries are True,
 otherwise False.  Both short-circuit their evaluation, so that if the
 first element of a billion element list gives a True value for any()
 (or a False value for all()), then the evaluation of the remaining
 billion-1 items is skipped.

 Best of luck in your new Python learning process,
 -- Paul
 


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Re: make images with python

2007-08-26 Thread Steve Holden

Lawrence D'Oliveiro wrote:
 In message [EMAIL PROTECTED], Boris
 Borcic wrote:
 
 Lawrence Oluyede wrote:

 stefano [EMAIL PROTECTED] wrote:
 I need make some images using python but i'm lost :P
 http://www.pythonware.com/products/pil/

 If you want to do antialiased drawings into images,
 you might rather want to look for pil at

 http://effbot.org/downloads/

 and grab PIL together with the aggdraw extension
 (while core PIL includes some drawing primitives,
 last time I tried they weren't antialiased).
 
 I see that PIL supports image resizing
 http://www.pythonware.com/library/pil/handbook/image.htm with filters
 that can be used for antialiasing. So just do all your drawing at, say,
 200% scale, then downsample with Image.resize to antialias.

That certainly worked very well for rendering text.

regards
  Steve
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Skype: holdenweb  http://del.icio.us/steve.holden
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Re: beginner, idiomatic python

2007-08-26 Thread Gabriel Genellina

En Sun, 26 Aug 2007 22:58:35 -0300, bambam [EMAIL PROTECTED] escribi�:

 Ok, many environments are capable of cached evaluation
 of functions without variable parameters so
 range(5)
 is cached, but
 range(v) is re-evaluated every time. Is this defined
 behaviour?

The range builtin function returns a list, and lists are mutable objects,  
so it must return a *different* list each time.

 That is, is it defined what Python does for
 for i in f()
 I'm sure it must be, but I haven't seen it yet. If I have
 a user defined function returning a range, is it defined
 that the range function is called on every loop? If I
 have a function returning a range taking a parameter,
 for i in f(v)
 is it defined that the variable is evaluated for every loop?

Find all the (mostly negative) answers yourself in  
http://docs.python.org/ref/for.html

-- 
Gabriel Genellina

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Re: beginner, idiomatic python

2007-08-26 Thread Scott David Daniels

bambam wrote:
 That is, is it defined what Python does for
 for i in f()
 I'm sure it must be, but I haven't seen it yet. If I have
 a user defined function returning a range, is it defined
 that the range function is called on every loop? If I
 have a function returning a range taking a parameter,
 for i in f(v)
 is it defined that the variable is evaluated for every loop?

Nope.  Take the tutorial.

 for i in f(v):
 suite
is the same as:
 iterator = iter(f(v))
 for i in iterator:
 suite

-Scott David Daniels
[EMAIL PROTECTED]
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Re: beginner, idiomatic python

Thank you, I have been through the tutorial several times, I guess
I'm just not smart enough. Perhaps I have been led astray by what
I read here?

My code started like this:

for i in range(self.parent.GetPageCount()):

I was asked:

Does page count change? i.e. is it necessary to retrieve it in every loop


Is self.parent.GetPageCount() 'retrieved every loop'?

Steve.




Gabriel Genellina [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 En Sun, 26 Aug 2007 22:58:35 -0300, bambam [EMAIL PROTECTED] escribi?:

 Ok, many environments are capable of cached evaluation
 of functions without variable parameters so
 range(5)
 is cached, but
 range(v) is re-evaluated every time. Is this defined
 behaviour?

 The range builtin function returns a list, and lists are mutable objects, 
 so it must return a *different* list each time.

 That is, is it defined what Python does for
 for i in f()
 I'm sure it must be, but I haven't seen it yet. If I have
 a user defined function returning a range, is it defined
 that the range function is called on every loop? If I
 have a function returning a range taking a parameter,
 for i in f(v)
 is it defined that the variable is evaluated for every loop?

 Find all the (mostly negative) answers yourself in 
 http://docs.python.org/ref/for.html

 -- 
 Gabriel Genellina
 


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Re: beginner, idiomatic python

Thank you, I have been through the tutorial several times, I guess
I'm just not smart enough. Python is quite different from the
languages I am familiar with.

My code sample started like this:

for i in range(self.parent.GetPageCount()):

I was asked:

Does page count change? i.e. is it necessary to retrieve it in every loop


Is self.parent.GetPageCount() 'retrieved every loop'?

Steve.

Scott David Daniels [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 bambam wrote:
 That is, is it defined what Python does for
 for i in f()
 I'm sure it must be, but I haven't seen it yet. If I have
 a user defined function returning a range, is it defined
 that the range function is called on every loop? If I
 have a function returning a range taking a parameter,
 for i in f(v)
 is it defined that the variable is evaluated for every loop?

 Nope.  Take the tutorial.

 for i in f(v):
 suite
 is the same as:
 iterator = iter(f(v))
 for i in iterator:
 suite

 -Scott David Daniels
 [EMAIL PROTECTED] 


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how setup a dll file as a module?

2007-08-26 Thread smalltalk



in arcgis , arcgisscripting is a dll file
there is a script as following:

import  arcgisscripting
gp = arcgisscripting.create()

why can the script run?
how can we setup a dll file as a module?

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Re: Parser Generator?

2007-08-26 Thread Paul McGuire

On Aug 26, 8:05 pm, Ryan Ginstrom [EMAIL PROTECTED] wrote:
  On Behalf Of Jason Evans
  Parsers typically deal with tokens rather than individual
  characters, so the scanner that creates the tokens is the
  main thing that Unicode matters to.  I have written
  Unicode-aware scanners for use with Parsing-based parsers,
  with no problems.  This is pretty easy to do, since Python
  has built-in support for Unicode strings.

 The only caveat being that since Chinese and Japanese scripts don't
 typically delimit words with spaces, I think you'd have to pass the text
 through a tokenizer (like ChaSen for Japanese) before using PyParsing.

 Regards,
 Ryan Ginstrom

Did you think pyparsing is so mundane as to require spaces between
tokens?  Pyparsing has been doing this type of token-recognition since
Day 1.  Looking for tokens without delimiting spaces was one of the
first applications for pyparsing.  This issue is not unique to Chinese
or Japanese text.  Pyparsing will easily find the tokens in this
string:

y=a*x**2+b*x+c

as

['y','=','a','*','x','**','2','+','b','*','x','+','c']

even though there is not a single delimiting space.  But pyparsing
will also render this as a nested parse tree, reflecting the
precedence of operations:

['y', '=', [['a', '*', ['x', '**', 2]], '+',['b', '*', 'x'], '+',
'c']]

and will allow you to access individual tokens by field name:
- lhs: y
- rhs: [['a', '*', ['x', '**', 2]], '+', ['b', '*', 'x'], '+', 'c']

Please feel free to look through the posted examples on the pyparsing
wiki at http://pyparsing.wikispaces.com/Examples, or some of the
applications currently using pyparsing at 
http://pyparsing.wikispaces.com/WhosUsingPyparsing,
and you might get a better feel for what kind of tasks pyparsing is
capable of.

-- Paul

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Re: beginner, idiomatic python

Is it safe to write

A = [x for x in A if x in U]

or is that undefined? I understand that the slice operation
can be used to make a temporary copy, so I could write

A=[x for x in A[:] if x in U]

but I've just copied that without any understanding.

Steve.


bambam [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 That looks good, and perhaps a difference operator
 would be too simple to be useful anyway.

 Steve.

 Mikael Olofsson [EMAIL PROTECTED] wrote in message 
 news:[EMAIL PROTECTED]


 bambam wrote:

 In this case it doesn't matter - my lists don't contain
 duplicate elements this time - but I have worked with lists in
 money market and in inventory, and finding the intersection
 and difference for matching off and netting out are standard
 operations.

 I would use a list comprehension for that case:

 A = ['a','b','c','a','c','d']
 U = ['a','b','e']
 B = [x for x in A if x in U]

 The result would be B==['a','b','a']

 /MiO

 


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Paul McGuire wrote:
On Aug 26, 8:05 pm, Ryan Ginstrom [EMAIL PROTECTED] wrote:
The only caveat being that since Chinese and Japanese scripts don't
typically delimit words with spaces, I think you'd have to pass the text
through a tokenizer (like ChaSen for Japanese) before using PyParsing.

Did you think pyparsing is so mundane as to require spaces between
tokens? Pyparsing has been doing this type of token-recognition since
Day 1. Looking for tokens without delimiting spaces was one of the
first applications for pyparsing. This issue is not unique to Chinese
or Japanese text. Pyparsing will easily find the tokens in this
string:

y=a*x**2+b*x+c

['y','=','a','*','x','**','2','+','b','*','x','+','c']

The difference is that in the expression above (and in many other
tokenization problems) you can determine word boundaries by looking at
the class of character, e.g. alphanumeric vs. punctuation vs. whatever.

In Japanese and Chinese tokenization, word boundaries are not marked by
different classes of characters. They only exist in the mind of the
reader who knows which sequences of characters could be words given the
context, and which sequences of characters couldn't.

The closest analog would be to ask pyparsing to find the words in the
following sentence:

ThepyparsingmoduleprovidesalibraryofclassesthatclientcodeusestoconstructthegrammardirectlyinPythoncode.

Most approaches that have been even marginally successful on these kinds
of tasks have used statistical machine learning approaches.

STeVe
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Re: Error with Simplemapi.py

2007-08-26 Thread Gabriel Genellina

En Fri, 24 Aug 2007 04:03:05 -0300, Mick Duprez [EMAIL PROTECTED]  
escribi�:

 I have a small problem. I get an error I don't know how to resolve,
 any help would be much appreciated.
 I'm using Python25 on winXP pro and the script from the link above.
 Here's the error -

 mailtest.SendMail('[EMAIL PROTECTED]','test','test  
 string','c:\dbs.txt')

That should be 'c:\\dbs.txt' or r'c:\dbs.txt'

 Traceback (most recent call last):
   File pyshell#10, line 1, in module
 mailtest.SendMail('[EMAIL PROTECTED]','test','test string','c:
 \dbs.txt')
   File C:\Python25\mailtest.py, line 135, in SendMail
 cast(NULL, lpMapiRecipDesc), RecipCnt, recip,
   File C:\Python25\lib\ctypes\__init__.py, line 478, in cast
 return _cast(obj, obj, typ)
 ArgumentError: argument 1: type 'exceptions.TypeError': wrong type


I'm unsure what those cast(NULL, ...) are supposed to do, but they look  
all wrong. NULL, as defined on that script, is *not* a C NULL pointer (use  
None for that).
(In fact the whole script doesn't look well at all - do you *have* to use  
MAPI? can't use SMTP instead? Even if you must use MAPI, try the pywin32  
package from Mark Hammond, it has MAPI support and a demo script for  
sending mail)

 I have had a brief look at the C api for these structs and functions
 but I can't resolve it, it is probably something simple.
 The piece of code I don't understand though is this -

 MapiRecipDesc_A = MapiRecipDesc * len(RecipWork) #size of struct??

This declares a new type, an array of len(RecipWork) items, each of type  
MapiRecipDesc

 rda = MapiRecipDesc_A() # isn't it MapiRecipDesc as declared??

This creates an instance of the above array.

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Re: beginner, idiomatic python

bambam [EMAIL PROTECTED] wrote:

 Is it safe to write
 
 A = [x for x in A if x in U]
 
 or is that undefined? I understand that the slice operation

It's perfectly safe and well-defined, as the assignment rebinds the LHS
name only AFTER the RHS list comprehension is done.


Alex
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Re: beginner, idomatic python 2

Thank you. I didn't reply earlier because I was trying to get my
head around what you wrote, which was strange and foreign
to me.

It seems to me that the dictionary object you suggested is a
direct replacement for the function code, only more efficient
because the case table is internalised with a hash table, and
the original if/elif/else case table was unlikely to be implemented
as a hash table.

And presumably, it is idiomatic because Python programmers
expect to use dictionaries for their lookup tables.

You have answered a question I didn't know enough to ask :~)
--which is why I started with the general question, so I don't
feel too stupid about that --.

And now I wonder about the 'other' question. Should I consider
dynamically overriding the methods in my 'Device' class, instead
of creating separate classes for the Psp and Pwr devices?
I could create an object of the base Device class, and at init
I could make sure the methods were connected for a Psp or
a Pwr device. When (if ever) is that a good idea?

Steve.




Dan Bishop [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 On Aug 23, 10:21 pm, bambam [EMAIL PROTECTED] wrote:
 Would someone like to suggest a replacement for this? This is a
 function that returns different kinds of similar objects, depending
 on what is asked for. PSP and PWR are classes.  I don't really
 want to re-write the calling code very much: I'm just wondering
 if the function can be replaced with some kind of OOP pattern.

 def Device(DeviceType):
 if DeviceType=='PSP':
 return PSP()
 elif DeviceType==Power Supply
 return PWR()
 etc...

 Thanks!

 Typically, you'd use a dictionary:

 DEVICE_DICT = {
'PSP': PSP.
'Power Supply': PWR,
# etc.
 }

 and your function would simply return DEVICE_DICT[device_type]()
 


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Re: beginner, idiomatic python

bambam [EMAIL PROTECTED] wrote:
   ...
 Bags don't seem to be built in to my copy of Python, and

A bag is a collections.defaultdict(int) [[you do have to import
collections -- it's in the standard library, NOT built-in]].


Alex
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Re: how to remove number

2007-08-26 Thread Gabriel Genellina

En Tue, 21 Aug 2007 06:18:26 -0300, susanti marsol [EMAIL PROTECTED]  
escribi�:

 how to remove all number in our's document?

Can you be more specific?

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Re: beginner, idiomatic python

2007-08-26 Thread Paul Rubin

bambam [EMAIL PROTECTED] writes:
 Is it safe to write
 A = [x for x in A if x in U]
 or is that undefined? I understand that the slice operation
 can be used to make a temporary copy, so I could write
 A=[x for x in A[:] if x in U]
 but I've just copied that without any understanding.

You get a temporary copy either way; note you're going to linearly
search U on every pass.  Maybe you want:

   SU = set(u)
   A = [a for x in A if x in SU]

or possibly

   A = list(set(A)  set(U))

which will remove duplicate elements from A and not necessarily keep
them in the same order, but is likely to be fastest of the bunch.
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ANN: SCF released GPL

Dear all,

I am releasing much of my work including SCF (Cross platform Smart Card 
library  Tools written in Python) to the GPL license.

If interested, go to http://www.SnakeCard.com/Source.html

I am moving the doc to doxygen and cleaning up the code, so what you'll 
see there will change in the course of the next few weeks - basically 
can only get meaningful info on the classes hierarchy at this stage.
I am looking for a free subversion server resource to put the code ... 
if you know of any.

Some of the work there will be windows-only related (GINA, activeX 
components ... and not coded in Python) and the applets JavaCard and 
BasicCard ... I'm releasing these during the next few days.

Regards,

hg
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ANN: SCF released to GPL

Dear all,

I am releasing much of my work including SCF (Cross platform Smart Card
library  Tools written in Python) to the GPL license.

If interested, go to http://www.SnakeCard.com/Source.html

I am moving the doc to doxygen and cleaning up the code, so what you'll see
there will change in the course of the next few weeks - basically can only
get meaningful info on the classes hierarchy at this stage.
I am looking for a free subversion server resource to put the code ... if
you know of any.

Some of the work there will be windows-only related (GINA, activeX
components ... and not coded in Python) and the applets JavaCard and
BasicCard ... I'm releasing these during the next few days.

Regards,

hg 
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RE: Parser Generator?

2007-08-26 Thread Ryan Ginstrom

 On Behalf Of Paul McGuire
 
 On Aug 26, 8:05 pm, Ryan Ginstrom [EMAIL PROTECTED] wrote:
  The only caveat being that since Chinese and Japanese scripts don't 
  typically delimit words with spaces, I think you'd have 
 to pass the 
  text through a tokenizer (like ChaSen for Japanese) before 
 using PyParsing.
 
 Did you think pyparsing is so mundane as to require spaces 
 between tokens?  Pyparsing has been doing this type of 
 token-recognition since Day 1.

Cool! I stand happily corrected. I did write I think because although I
couldn't find a way to do it, there might well actually be one g. I'll
keep looking to find some examples of parsing Japanese.

BTW, I think PyParsing is great, and I use it for several tasks. I just
could never figure out a way to use it with Japanese (at least on the
applications I had in mind).

Regards,
Ryan Ginstrom

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Re: wxpython thread exception crash

2007-08-26 Thread [david]

  class RedirectText:
  def __init__(self,aWxTextCtrl):
  self.out=aWxTextCtrl

  def write(self,string):
  wx.CallAfter(self.out.WriteText,string) #CallAfter

  def flush(self):
  pass

[david]

[david] wrote:
 What am I doing wrong?
 I'm trying to capture stdErr in a multi-threaded program.
 
 This code crashes wxPython with
 /Py Assertion Error: C++ assertion m_count=-1 || m_count=-2 failed/
 
 What I'm trying to do is redirect stderr and stdout to a wxPython text 
 control.
 In an ideal world, when the worker thread crashes, I should get a stderr 
 message, with no effect on the main thread.
 
 In an alternate world, I should get an asynchronous exception in the 
 main thread when there is an unhandled exception in the worker thread.
 
 In the sample below, the program crashes on the following print statement.
 
 Oddly enough, I do catch the unhandled worker exception in the main 
 thread IF THE WORKER THREAD HAS NO INIT PARAMETER. Note: the init 
 parameter is the only subtle thing in the code.
 
 Since this is a crash, the exact behaviour will depend on your 
 environment. You may have difficulty seeing stdErr in some environments.
 
 Python 2.5, wxPython 2.7.2.0, Windows XP.
 (david)
 
 
 import wx
 import sys
 import threading
 
 class ExceptionThread(threading.Thread):
 def __init__(self,initvar):
 threading.Thread.__init__(self);
 
 def run(self):
 raise ET run
 
 
 class RedirectText:
 def __init__(self,aWxTextCtrl):
 self.out=aWxTextCtrl
 
 def write(self,string):
 self.out.WriteText(string)
 
 def flush(self):
 pass
 
 class Frame(wx.Frame):
 def __init__(self, image=None, parent=None):
 
 wx.Frame.__init__(self, parent)
 self.text = wx.TextCtrl(self, style=wx.TE_MULTILINE|wx.TE_RICH2)
 
 # redirection window 
 redir=RedirectText(self.text)
 sys.stdout=redir
 sys.stderr=redir
 
 
 class App(wx.App):
 def OnInit(self):
 self.frame=Frame()
 self.frame.Show()
 self.Thread=ExceptionThread(1)
 self.Thread.start();
 return True
 
 
 app = App()
 print 'trigger print failure'
 app.MainLoop()
 
 
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Re: ANN: SCF released GPL

2007-08-26 Thread Paul Rubin

hg [EMAIL PROTECTED] writes:
 I am looking for a free subversion server resource to put the code
 ... if you know of any.

Does it have to be SVN?  I think Savannah and Sourceforge both still
use CVS.  I'm not sure what Launchpad uses.  I guess if necessary I
could set up a subversion repo for you on a server that I use.  I've
been wanting to put together some GNU security tools under the name
Fort GNOX, so maybe this can be a start.
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Re: ANN: SCF released GPL

hg [EMAIL PROTECTED] wrote:
   ...
 I am looking for a free subversion server resource to put the code ...
 if you know of any.

Check out code.google.com -- it has a hosting service for open source
code, too, these days (and it IS subversion).


Alex
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Re: ANN: SCF released GPL

Paul Rubin wrote:
 hg [EMAIL PROTECTED] writes:
 I am looking for a free subversion server resource to put the code
 ... if you know of any.
 
 Does it have to be SVN?  I think Savannah and Sourceforge both still
 use CVS.  I'm not sure what Launchpad uses.  I guess if necessary I
 could set up a subversion repo for you on a server that I use.  I've
 been wanting to put together some GNU security tools under the name
 Fort GNOX, so maybe this can be a start.

Nope CVS would be fine ... I guess I've made the switch in my head.

I'll check SourceForge.

Thanks.

hg


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Re: ANN: SCF released to GPL

hg wrote:
 Dear all,
 
 I am releasing much of my work including SCF (Cross platform Smart Card
 library  Tools written in Python) to the GPL license.
 
 If interested, go to http://www.SnakeCard.com/Source.html
 
 I am moving the doc to doxygen and cleaning up the code, so what you'll see
 there will change in the course of the next few weeks - basically can only
 get meaningful info on the classes hierarchy at this stage.
 I am looking for a free subversion server resource to put the code ... if
 you know of any.
 
 Some of the work there will be windows-only related (GINA, activeX
 components ... and not coded in Python) and the applets JavaCard and
 BasicCard ... I'm releasing these during the next few days.
 
 Regards,
 
 hg 
PS: I apologize for the spam ... I just changed ISP .. and my initial 
post did not make it (or so I thought) ... sorry.
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Re: ANN: SCF released GPL

Alex Martelli wrote:
 hg [EMAIL PROTECTED] wrote:
...
 I am looking for a free subversion server resource to put the code ...
 if you know of any.
 
 Check out code.google.com -- it has a hosting service for open source
 code, too, these days (and it IS subversion).
 
 
 Alex

Will look it up ... thanks.

hg
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Re: beginner, idiomatic python

Thank you.

Steve.

Alex Martelli [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 bambam [EMAIL PROTECTED] wrote:

 Is it safe to write

 A = [x for x in A if x in U]

 or is that undefined? I understand that the slice operation

 It's perfectly safe and well-defined, as the assignment rebinds the LHS
 name only AFTER the RHS list comprehension is done.


 Alex 


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Re: beginner, idiomatic python

Thank you. I figured the set would probably be faster,
but the lists are small, and I'm concerned that the code
is going to look Byzantine if I keep swapping between
lists, sets and dictionaries :~).

At the moment there are no sets or dictionaries in the
entire code base I am working with. I'm not sure if the
place I am looking at right now is supposed to support
duplicates or not: duplicates are permitted, but they
cause report anomalies.

Steve.


Paul Rubin http://[EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]
 bambam [EMAIL PROTECTED] writes:
 Is it safe to write
 A = [x for x in A if x in U]
 or is that undefined? I understand that the slice operation
 can be used to make a temporary copy, so I could write
 A=[x for x in A[:] if x in U]
 but I've just copied that without any understanding.

 You get a temporary copy either way; note you're going to linearly
 search U on every pass.  Maybe you want:

   SU = set(u)
   A = [a for x in A if x in SU]

 or possibly

   A = list(set(A)  set(U))

 which will remove duplicate elements from A and not necessarily keep
 them in the same order, but is likely to be fastest of the bunch. 


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[issue1739648] zipfile.testzip() using progressive file reads

2007-08-26 Thread Grzegorz Adam Hankiewicz



Grzegorz Adam Hankiewicz
 added the comment:

Any progress report on this issue, please?

_
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[issue1760357] ZipFile.write fails with bad modification time

2007-08-26 Thread Grzegorz Adam Hankiewicz



Grzegorz Adam Hankiewicz
 added the comment:

Any progress report on this issue, please?

_
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http://bugs.python.org/issue1760357
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[issue1014] cgi: parse_qs and parse_qsl misbehave on empty strings

2007-08-26 Thread Senthil


Senthil added the comment:

Can query strings be empty? I am unable to find an instance.

--
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[issue1027] uudecoding (uu.py) does not supprt base64, patch attached

2007-08-26 Thread Gregory Dudek


Changes by Gregory Dudek:


--
components: Extension Modules
severity: normal
status: open
title: uudecoding (uu.py) does not supprt base64, patch attached
type: behavior
versions: Python 2.4

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[issue1027] uudecoding (uu.py) does not supprt base64, patch attached

2007-08-26 Thread Gregory Dudek


New submission from Gregory Dudek:

The uu.py library for uuencoding and uudecoding does not support base64 
encodins.  The patch addached here adds base64 decoding, but does not add 
encoding support.

--
nosy: +dudek

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uu.py-base64ugrade.diff
Description: Binary data
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[issue1028] Tkinter binding involving Control-spacebar raises unicode error


New submission from Kurt B. Kaiser:

The control-spacebar binding is used in IDLE to 
force open the completions window.  It's causing 
IDLE to exit with a utf8 decode error.  Attached 
is 
a Tkinter cut-down 
exhibiting the problem and a patch.

The cutdown runs ok on 2.6 but not on py3k because 
the latter uses PyUnicode_FromString on all the 
arguments and errs out when it encounters a 
character outside the utf-8 range.

Strangely, on my system, control-spacebar is 
sending a two byte 
string, C0E8 via the %A parameter.  Control-2 
does 
the same.  Other keys with combinations of 
modifier 
keys send one byte.

Linux trader 2.6.18-ARCH #1 SMP PREEMPT Sun Nov 
19 
09:14:35 CET 2006 i686 Intel(R) Pentium(R) 4 CPU 
2.40GHz GenuineIntel GNU/Linux

Can the problem be confirmed?

Using PyUnicode_FromUnicode on %A works because 
the 
unicode string is copied instead of decoded, and 
that parameter is supposed to be unicode, in any 
case.

The patch fixes the problem on my system but 
should 
be reviewed, especially whether the cast in the 
call 
to PyUnicode_FromUnicode is suitably cross-
platform.

Assigning to Neal since he's working a lot of 
Unicode issues right now.  I can check it in if I 
get approval.

--
assignee: nnorwitz
components: Tkinter
files: tkintertest.py
keywords: patch, py3k
messages: 55311
nosy: kbk
severity: normal
status: open
title: Tkinter binding involving Control-spacebar raises unicode error
versions: Python 3.0

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tkintertest.py
Description: application/python
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[issue1028] Tkinter binding involving Control-spacebar raises unicode error


Kurt B. Kaiser added the comment:

Heh, I see we have the same damn problem SF had: when a comment is 
edited, 
it doesn't re-wrap properly when submitted.  You have to remove the 
returns 
manually after editing.

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__Index: Modules/_tkinter.c
===
--- Modules/_tkinter.c  (revision 57515)
+++ Modules/_tkinter.c  (working copy)
@@ -1897,7 +1897,7 @@
 PythonCmd(ClientData clientData, Tcl_Interp *interp, int argc, char *argv[])
 {
PythonCmd_ClientData *data = (PythonCmd_ClientData *)clientData;
-   PyObject *self, *func, *arg, *res;
+   PyObject *self, *func, *arg, *res, *s;
int i, rv;
Tcl_Obj *tres;
 
@@ -1914,7 +1914,12 @@
return PythonCmd_Error(interp);
 
for (i = 0; i  (argc - 1); i++) {
-   PyObject *s = PyUnicode_FromString(argv[i + 1]);
+   if (11 == (i + 1)) {  /* the %A arg is the unicode char */
+   s = PyUnicode_FromUnicode((Py_UNICODE *) argv[i + 1], 
1);
+   }
+   else {
+   s = PyUnicode_FromString(argv[i + 1]);
+   }
if (!s || PyTuple_SetItem(arg, i, s)) {
Py_DECREF(arg);
return PythonCmd_Error(interp);
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[issue1028] Tkinter binding involving Control-spacebar raises unicode error


Kurt B. Kaiser added the comment:

Nope, you have to make sure not to type too wide.

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[issue1030] py3k: Adapt _winreg.c to the new buffer API


Changes by Amaury Forgeot d'Arc:


--
components: Windows
files: winreg.diff
severity: normal
status: open
title: py3k: Adapt _winreg.c to the new buffer API
type: compile error
versions: Python 3.0

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[issue1031] py3k: compilation with VC2005


New submission from Amaury Forgeot d'Arc:

This patch is necessary to compile inside the PCBuild8 directory

--
components: Windows
files: vc2005.diff
messages: 55315
nosy: amaury.forgeotdarc
severity: normal
status: open
title: py3k: compilation with VC2005
type: compile error
versions: Python 3.0

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vc2005.diff
Description: Binary data
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[issue1031] py3k: compilation with VC2005


Neal Norwitz added the comment:

Thanks for the patch.  I tried to apply this patch, but almost
everything failed.  Could you make sure to do a svn update and then
generate the patch?

The only part of the patch that applied cleanly was to rmpyc.py.  That
was checked in as:
Committed revision 57527.

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nosy: +nnorwitz

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[issue1032] Improve the hackish runtime_library_dirs support for gcc

2007-08-26 Thread Alexandre Vassalotti


New submission from Alexandre Vassalotti:

In distutils.unixccompiler, there is a hack to passing correctly the -R
option to gcc (and a few other compilers). However, there is a small bug
   that causes gcc to not be detected correctly if the compiler name
does not start with gcc (e.g., i486-linux-gnu-gcc, or ccache gcc).

--
components: Distutils
messages: 55317
nosy: alexandre.vassalotti
severity: minor
status: open
title: Improve the hackish runtime_library_dirs support for gcc
type: compile error

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[issue1030] py3k: Adapt _winreg.c to the new buffer API


New submission from Neal Norwitz:

Thanks!  I can't test this, but I applied the change.  It makes sense to me.

Committed revision 57528.

--
assignee:  - nnorwitz
nosy: +nnorwitz
resolution:  - accepted
status: open - closed

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[issue1031] py3k: compilation with VC2005


Amaury Forgeot d'Arc added the comment:

Sorry, it's probably because I somehow converted the line endings.
Attached a new version of the patch.

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[issue1032] Improve the hackish runtime_library_dirs support for gcc

2007-08-26 Thread Alexandre Vassalotti


Changes by Alexandre Vassalotti:


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[issue1031] py3k: compilation with VC2005


Neal Norwitz added the comment:

Hmmm, the patch was out of date (I had already removed cPickle). 
However, I don't think that was the reason for everything failing.  I
manually applied the changes to the files and python version.  Things
should be pretty good now.  I didn't add the libraries.  I'm not sure
why they are needed now while they weren't necessary before.  

Committed revision 57529.

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[issue1028] Tkinter binding involving Control-spacebar raises unicode error


Changes by Kurt B. Kaiser:


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[issue1028] Tkinter binding involving Control-spacebar raises unicode error


Kurt B. Kaiser added the comment:

Well, maybe someday Tk will send a multibyte unicode
character.  Update the patch.

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__Index: Modules/_tkinter.c
===
--- Modules/_tkinter.c  (revision 57515)
+++ Modules/_tkinter.c  (working copy)
@@ -1897,7 +1897,7 @@
 PythonCmd(ClientData clientData, Tcl_Interp *interp, int argc, char *argv[])
 {
PythonCmd_ClientData *data = (PythonCmd_ClientData *)clientData;
-   PyObject *self, *func, *arg, *res;
+   PyObject *self, *func, *arg, *res, *s;
int i, rv;
Tcl_Obj *tres;
 
@@ -1914,7 +1914,13 @@
return PythonCmd_Error(interp);
 
for (i = 0; i  (argc - 1); i++) {
-   PyObject *s = PyUnicode_FromString(argv[i + 1]);
+   if (11 == (i + 1)) {  /* the %A arg is the unicode char */
+   char *a = argv[i + 1];
+   s = PyUnicode_FromUnicode((Py_UNICODE *) a, strlen(a));
+   }
+   else {
+   s = PyUnicode_FromString(argv[i + 1]);
+   }
if (!s || PyTuple_SetItem(arg, i, s)) {
Py_DECREF(arg);
return PythonCmd_Error(interp);
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[issue1031] py3k: compilation with VC2005


Neal Norwitz added the comment:

I thought it might be line endings so I tried changing them, but that
didn't help.  I couldn't apply the new version of the patch either.  I'm
not sure if the problem is on your side or mine. :-(

I missed some files from the original checkin.  The new one hopefully
has all the files and is just missing the libraries.  Can you svn update
and look at the new differences?  Thanks.

Committed revision 57530.

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[issue1029] py3k: io.StringIO.getvalue() returns \r\n

2007-08-26 Thread Alexandre Vassalotti


Alexandre Vassalotti added the comment:

As far as I know, StringIO should not do any string transformations.

From PEP-3116 New I/O, last paragraph of the section Text I/O:
 Another implementation, StringIO, creates a file-like TextIO
 implementation without an underlying Buffered I/O object. [...]  It
 does not support encodings or newline translations; you always read
 back exactly the characters you wrote.

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[issue1029] py3k: io.StringIO.getvalue() returns \r\n


Amaury Forgeot d'Arc added the comment:

 As far as I know, StringIO should not do any string transformations.

(Not sure if you agree with the patch or not)
That's why the current behaviour is not correct: When I write('\n'),
getvalue() currently returns '\r\n'.

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[issue1028] Tkinter binding involving Control-spacebar raises unicode error