The Python's regex different from Perl's ,I want know what's thedifferent?

[qq13234722]

The Python's regex different from Perl's ,I want know what's the
different?

 

[Tim Chase]

The Python's regex different from Perl's ,I want know what's the

different?

Easy:

bash$ diff <(lynx -dump http://perldoc.perl.org/perlre.html)
<(lynx -dump http://docs.python.org/library/re.html)


Had you tried the great Google in the sky, you might have found
such pages as:

http://mail.python.org/pipermail/python-list/2005-April/319030.html

or even a popular book on the subject:

http://oreilly.com/catalog/9780596002893/



-tkc

 

[Shawn Milochik]

The regular expression syntax is basically exactly the same. The main
difference is that a regex can't just be written into a statement as
part of the syntax; you have to create a regular expression object and
use its methods.

So, instead of:
new_thing =~ s/pattern/replacement/
it's:
myPattern = re.compile(r'pattern')
new_thing = myPattern.sub(replacement, input_string)
or:
new_thing = re.sub(pattern, replacement, input_string)

Also, backreferences are \1 instead of $1, and you have to escape the
backslash or use a raw string for the backslash.

I've found this page to be pretty helpful:
http://www.regular-expressions.info/python.html

Shawn