On Fri, 01 Jan 2010 21:01:04 -0500, Cousin Stanley
<cousinstan...@gmail.com> wrote:
<snip>
I was not familiar with the re.finditer method
for searching strings ...
Stanley and Dave --
So far, we've just been using finditer() to perform standard-string
searches (e.g. on the word "red"). Since Dave now wants to color multiple
words the same color (e.g. the words in redList), we can use a single
regular-expression search to locate *all* the words in a list. This
eliminates the need to use a "for" loop to handle the list. Here's what I
mean:
>>> import re
>>> s = "it is neither red nor crimson, but scarlet, you see"
########## individual searches
>>> [matchobj.span() for matchobj in re.finditer("red", s)]
[(14, 17)]
>>> [matchobj.span() for matchobj in re.finditer("crimson", s)]
[(22, 29)]
>>> [matchobj.span() for matchobj in re.finditer("scarlet", s)]
[(35, 42)]
########## one "swell foop"
>>> redList = "red crimson scarlet".split()
>>> redList_regexp = "|".join(redList)
>>> redList_regexp
'red|crimson|scarlet'
>>> [matchobj.span() for matchobj in re.finditer(redList_regexp, s)]
[(14, 17), (22, 29), (35, 42)]
-John
--
http://mail.python.org/mailman/listinfo/python-list
