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Regex for re.match not working as expected.

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Regex for re.match not working as expected.

 
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  #1
Oct 9th, 2008
I have the following code:
python Syntax (Toggle Plain Text) 
  1. import re
  2. string = 'c:\test.doc'
  3. if re.match(r":\\[0-9a-z]", string):
  4.       ##r":\\[0-9a-z]" should match ':\t'
  5.       print 'true'
  6. else:
  7.       print 'false'
the problem I am having is that this is always evaluating to false.
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Re: Regex for re.match not working as expected.

 
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  #2
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:
Python Syntax (Toggle Plain Text) 
  1. import re
  2. s = r'c:\test.doc'
  3. m = re.search(r":(\\[0-9a-z])", s)
  4. if m:
  5.       print m.group(1)
  6. else:
  7.       print m
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Re: Regex for re.match not working as expected.

 
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  #3
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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Re: Regex for re.match not working as expected.

 
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  #4
Oct 10th, 2008
you could just as easily do s = 'c:\\test.doc'
1. Use Code Tags.
2. Homework? Show Effort.
3. Keep discussions on the forum: no PMs
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Re: Regex for re.match not working as expected.

 
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  #5
Oct 10th, 2008
If the file name is a variable returned from some source:
Python Syntax (Toggle Plain Text) 
  1. >>> s = "c:\test.doc"
  2. >>> s1 = repr(s).strip("'")
  3. >>> s1
  4. 'c:\\test.doc'
  5. >>>
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