Regex substitution trouble

Eugene hexumg at
Wed Nov 5 11:44:35 CET 2014

massi_srb at wrote:

> Hi everyone,
> I'm not really sure if this is the right place to ask about regular
> expressions, but since I'm usin python I thought I could give a try 
> Here is the problem, I'm trying to write a regex in order to 
> all the occurences in the form $"somechars" with another string. This 
> what I wrote:
> newstring = re.sub(ur"""(?u)(\$\"[\s\w]+\")""", subst, oldstring)
> This works pretty well, but it has a problem, I would need it also to
> handle the case in which the internal string contains the double 
> but only if preceeded by a backslash, that is something like
> $"somechars_with\\"doublequotes". Can anyone help me to correct it?
> Thanks in advance!

Next snippet works for me:

re.sub(r'\$"([\s\w]+(\\")*[\s\w]+)+"', 'noop', r'$"te\"sts\"tri\"ng"')

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