[Tutor] how to match regular expression from right to left

[Tom Tucker]

Yep, looks like it.

>>> line = 'us::blah blah2 1002 blah3'
>>> import re
>>> TAG_pattern = re.compile(r"(us::.*) .*(1002|1003).*$")
>>> if TAG_pattern.search(line):
...     print 'we have a match'
...
we have a match
>>>

>>> line2 ='us::blah blah2 1001 blah3'
>>> if TAG_pattern.search(line2):
...     print 'we have a match'
... else:
...     print 'no match found'
...
no match found



On 9/16/07, $B2&D6(B <daniel.chaowang at gmail.com> wrote:
> hi,
>
> I want to match the regular expression from right to left, such as:
>
> TAG_pattern = re.compile(r"(us::.*) .*(1002|1003).*$")
> TAG_pattern.search(line)
>
> Does the search method support this?
>
> Thanks,
> Daniel
>
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