[issue21464] fnmatch module uses regular expression with undefined result to perform matching

2014-05-10 Thread akira 

akira added the comment:

I don't see (?x) flag and it is not introduced by `res` regular expression that 
is constructed within translate() function in Lib/fnmatch.py

   import fnmatch
   fnmatch.translate('a b')
  'a\\ b\\Z(?ms)'

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nosy: +akira

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[issue21464] fnmatch module uses regular expression with undefined result to perform matching

2014-05-10 Thread Paul Sokolovsky 

Paul Sokolovsky added the comment:

I see, so it's my misreading of the re module docs. I kinda thought that x 
in (?x) means any single-character flag of set (?aiLmsux). I was wrong, it 
is the specific literal flag. 

Also, rereading it again, the doc says the letters set the corresponding 
flags: [list of flags], for the entire regular expression. So, my report is 
invalid.

Just to give some context, I hit this when porting fnmatch.py to MicroPython 
(http://micropython.org/), which doesn't use native CPython SRE, but instead 
system PCRE. Well, it would be nice if stdlib maintained kind of compatibility 
with original PCRE semantics, but that's kinda wishful thinking, we'll work it 
around on our side. 

Closing this.

--
resolution:  - works for me
status: open - closed

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[issue21464] fnmatch module uses regular expression with undefined result to perform matching

2014-05-09 Thread Paul Sokolovsky 

Changes by Paul Sokolovsky pfal...@users.sourceforge.net:


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title: fnmatch module uses undefined regular expression to perform matching - 
fnmatch module uses regular expression with undefined result to perform matching

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