[regex] Basic rewriting

J. Clifford Dyer jcd at sdf.lonestar.org
Wed Nov 21 03:57:43 CET 2007


On Wed, 2007-11-21 at 03:24 +0100, Gilles Ganault wrote:
> Hello
> 
> 	I've been reading tutorials on regexes in Python, but I still
> don't get it:
> 
> ========
> #!/usr/bin/python
> 
> #myscript.py 0123456789
> 
> import sys,re
> 
> #Turn 0123456789 into 01.23.45.67.89
> p = re.compile('(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)')
> phone = p.sub('\1.\2.\3.\4.\5',sys.argv[1])
> print phone
> ========
> 
> => Python displays "...." instead. Any idea what I'm doing wrong?
> 
> Thank you.

Use raw strings for re expressions.

r'this is a raw string'
'this is not'

p = re.compile(r'(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)')
phone = p.sub(r'\1.\2.\3.\4.\5',sys.argv[1])

Should clear up your problem.




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