Why doesn't this RE match?
John Machin
sjmachin at lexicon.net
Fri Feb 6 19:55:41 EST 2009
On Feb 7, 11:23 am, "Just Another Victim of the Ambient Morality"
<ihates... at hotmail.com> wrote:
> I'm confused by this behaviour:
>
> import re
>
> regex = re.compile('foo')
> match = regex.match('whatfooever')
>
> In my experience with regular expressions, regex should have found a
> match. However, in this case regex.match() returns None. Why is that?
Because that is exactly what it is documented to do.
> What am I missing?
Inter alia:
(1) The whole section of the fantastic manual devoted to this topic:
http://www.python.org/doc/2.6/library/re.html#matching-vs-searching
(2) a section in the fabulous HOWTO:
http://www.python.org/doc/2.6/howto/regex.html#performing-matches
(3) the re section in the phantasmagorical help sub-system (very handy
if your internet connection goes on the fritz):
Python 2.6.1 (r261:67517, Dec 4 2008, 16:51:00) [MSC v.1500 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> help(re)
Help on module re:
[snip]
This module exports the following functions:
match Match a regular expression pattern to the beginning
of a string.
search Search a string for the presence of a pattern.
[snip]
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