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Regex for re.match not working as expected.

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Posts: 2

Reputation: unkwntech is an unknown quantity at this point

Solved Threads: 0

unkwntech

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Newbie Poster

Regex for re.match not working as expected.

Oct 9th, 2008

I have the following code:

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import re
string = 'c:\test.doc'
if re.match(r":\\[0-9a-z]", string):
      ##r":\\[0-9a-z]" should match ':\t'
      print 'true'
else:
      print 'false'
import re
string = 'c:\test.doc'
if re.match(r":\\[0-9a-z]", string):
      ##r":\\[0-9a-z]" should match ':\t'
      print 'true'
else:
      print 'false'

the problem I am having is that this is always evaluating to false.

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Posts: 109

Reputation: solsteel is on a distinguished road

Solved Threads: 26

solsteel

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Junior Poster

Re: Regex for re.match not working as expected.

Oct 9th, 2008

The substring "\t" in string is evaluated as a tab character. The re method match only matches at the beginning of a string. Try this:

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import re
s = r'c:\test.doc'
m = re.search(r":(\\[0-9a-z])", s)
if m:
      print m.group(1)
else:
      print m
import re
s = r'c:\test.doc'
m = re.search(r":(\\[0-9a-z])", s)
if m:
      print m.group(1)
else:
      print m

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Posts: 2

Reputation: unkwntech is an unknown quantity at this point

Solved Threads: 0

unkwntech

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Newbie Poster

Re: Regex for re.match not working as expected.

Oct 9th, 2008

Ok, I'm not used to that yet, in PHP if I encased the string in ' it would have not evaluated the \t, or any other special character.

Thanks.

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Posts: 770

Reputation: jlm699 is a jewel in the rough

Solved Threads: 139

jlm699

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Knows where his Towel is

Re: Regex for re.match not working as expected.

Oct 10th, 2008

you could just as easily do s = 'c:\\test.doc'

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3. Keep discussions on the forum: no PMs

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Posts: 109

Reputation: solsteel is on a distinguished road

Solved Threads: 26

solsteel

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Junior Poster

Re: Regex for re.match not working as expected.

Oct 10th, 2008

If the file name is a variable returned from some source:

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>>> s = "c:\test.doc"
>>> s1 = repr(s).strip("'")
>>> s1
'c:\\test.doc'
>>>

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