On May 13, 3:10 pm, MRAB <pyt...@mrabarnett.plus.com> wrote:
> albert kao wrote:
> > I want to walk a directory and ignore all the files or directories
> > which names begin in '.' (e.g. '.svn').
> > Then I will process all the files.
> > My test program walknodot.py does not do the job yet.
> > Python version is 3.1 on windows XP.
> > Please help.
>
> > [code]
> > #!c:/Python31/python.exe -u
> > import os
> > import re
>
> > path = "C:\\test\\com.comp.hw.prod.proj.war\\bin"
> > for dirpath, dirs, files in os.walk(path):
> > print ("dirpath " + dirpath)
> > p = re.compile('\\\.(\w)+$')
> > if p.match(dirpath):
> > continue
> > print ("dirpath " + dirpath)
> > for dir in dirs:
> > print ("dir " + dir)
> > if dir.startswith('.'):
> > continue
>
> > print (files)
> > for filename in files:
> > print ("filename " + filename)
> > if filename.startswith('.'):
> > continue
> > print ("dirpath filename " + dirpath + "\\" + filename)
> > # process the files here
> > [/code]
>
> > C:\python>walknodot.py
> > dirpath C:\test\com.comp.hw.prod.proj.war\bin
> > dirpath C:\test\com.comp.hw.prod.proj.war\bin
> > dir .svn
> > dir com
> > []
> > dirpath C:\test\com.comp.hw.prod.proj.war\bin\.svn
> > dirpath C:\test\com.comp.hw.prod.proj.war\bin\.svn
> > ...
>
> > I do not expect C:\test\com.comp.hw.prod.proj.war\bin\.svn to appear
> > twice.
> > Please help.
>
> The problem is with your use of the 'match' method, which will look for
> a match only at the start of the string. You need to use the 'search'
> method instead.
>
> The regular expression is also incorrect. The string literal:
>
> '\\\.(\w)+$'
>
> passes the characters:
>
> \\.(\w)+$
>
> to the re module as the regular expression, which will match a
> backslash, then any character, then a word, then the end of the string.
> What you want is:
>
> \\\.\w+$
>
> (you don't need the parentheses) which is best expressed as the 'raw'
> string literal:
>
> r'\\\.\w+$'
Following your advice and add the case for C:\test
\com.comp.hw.prod.proj.war\bin\.svn\tmp
p = re.compile(r'\\\.\w+$')
if p.search(dirpath):
continue
p = re.compile(r'\\\.\w+\\')
if p.search(dirpath):
continue
Problem is solved.
Thanks.
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