On Fri, 08 Jan 2010 14:28:57 -0500, MRAB <pyt...@mrabarnett.plus.com>
wrote:
Dave McCormick wrote:
On Wed, Jan 6, 2010 at 9:18 AM, John Posner <jjpos...@optimum.net
<mailto:jjpos...@optimum.net>> wrote:
On Tue, 05 Jan 2010 16:54:44 -0500, Dave McCormick
<mackrac...@gmail.com <mailto:mackrac...@gmail.com>> wrote:
But it is not what I am wanting. I first thought to make it
look
for a space but that would not work when a single character like
"#" is to be colored if there is a "string" of them. Or if all
of the characters between quotes are to be colored.
Regular expressions are good at handling searches like:
* all the characters between quotes
* the two-character string "do", but only if it's a complete word
-John
-- http://mail.python.org/mailman/listinfo/python-list
I need another hint...
Been doing some reading and playing and it looks like
r'\bxxx\b'
is what I need. But I can not figure out how to pass a variable between
\b___\b
If the word in question is between the "\b \b" and in the list then it
works like I want it to.
The below does not work.
greenList_regexp = "|".join(greenList)
for matchobj in re.finditer(r'\bgreenList_regexp\b', complete_text):
start,end = matchobj.span()
The regex r'\bgreenList_regexp\b' will match the string
'greenList_regexp' if it's a whole word.
What you mean is "any of these words, provided that they're whole
words". You'll need to group the alternatives within "(?:...)", like
this:
r'\b(?:' + greenList_regexp + ')\b'
Oops, MRAB, you forgot to make the last literal a RAW string -- it should
be r')\b'
Dave, we're already into some pretty heavy regular-expression work, huh?.
Here's another approach -- not nearly as elegant as MRAB's:
Given this list:
greenList = ['green', 'grass', 'grump']
... you currently are using join() to construct this regexp search string:
'green|grass|grump'
... but you've decided that you really want this similar regexp search
string:
r'\bgreen\b|\bgrass\b|\bgrump\b'
You can achieve this by transforming each item on the list, then invoking
join() on the transformed list to create the search string. Here are a
couple of ways to transform the list:
* List comprehension:
whole_word_greenList = [ r'\b' + word + r'\b' for word in greenList]
* map() and a user-defined function:
def xform_to_wholeword_searchstring(word):
return r'\b' + word + r'\b'
whole_word_greenList = map(xform_to_wholeword_searchstring, greenList)
HTH,
John
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