On 26/06/12 23:30, Alexander Quest wrote:
My question is how does Python know to return just the part in the
parentheses and not to return the "blahblah" and the "yattayattayatta",
etc...?
If you want to know *how* Python does it you will have to read the
module code (probably in C so download the source code)
... Does the
re.findall command by default ignore anything outside of the parentheses
and only return the parentheses as a grouping withing one tuple
The help() function returns:
--------------
findall(pattern, string, flags=0)
Return a list of all non-overlapping matches in the string.
If one or more groups are present in the pattern, return a
list of groups; this will be a list of tuples if the pattern
has more than one group.
Empty matches are included in the result.
------------------
So that's what its defined to do. How it does it is another matter.
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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