Regular Expressions - how to replace a character within quotes

Question

Hello regular expression experts,

There has never been a string manipulation problem I couldn\'t resolve with regular expressions until now, at least in an elegant m

Answer 1

Excuse me if you're not using Python, in which is the following code. I didn't see any indication of which language you use. Anyway, I think the code is perfectly understandable.

import re

ch = '''0,"section1","(7) Delivery of 'certificate' outside the United States prohibited.
Since both section 339 of the 1940 statute, 68/ and section 341 of the present law are explicit
in their statement that the certificate shall be furnished the citizen, only if such individual
is at the time within the United States, it is clear that the document could not and cannot be
delivered outside the United States.",http://www.google.com/

1,"section2",,http://www.google.com/

2,"section3",",,",http://www.google.com/
'''

poto = re.compile('("[^"]+")')

def comma_replacement(match):
    return match.group().replace(',','_')

print poto.sub(comma_replacement , ch)

This method keeps the 2 adjacent commas in the line

1,"section2",,http://www.google.com/

unchanged. Is it the right thing you want ?