how to get no value
Piet van Oostrum
piet at cs.uu.nl
Fri Jul 24 07:48:09 EDT 2009
>>>>> amrita at iisermohali.ac.in (a) a écrit:
>a> I have a file having lines:-
>a> 48 ALA H = 8.33 N = 120.77 CA = 55.18 HA = 4.12 C = 181.50
>a> 104 ALA H = 7.70 N = 121.21 CA = 54.32 HA = 4.21 C =
>a> 85 ALA H = 8.60 N = CA = HA = 4.65 C =
>a> Now i want to make two another file in which i want to put those lines for
>a> which C is missing and another one for which N,CA and C all are missing,
>a> I tried in this way:
>a> import re
>a> f = open('chem.txt')
>a> for line in f:
>a> if re.search('C = ',''):
>a> print line
>a> but i am not getting the desired output.
You never look in the lines you read.
if re.search('C = ',''): should be
if re.search('C = ', line):
Do you really think before you write your code? Or look at it after you
have written it?
Sorry if I offend you but you give the impression of just trying some
more or less random stuff and then asking here if it doesn't give the
That's not the attitude of a researcher, unless your definition of
research is 'asking on Usenet'.
Piet van Oostrum <piet at cs.uu.nl>
URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org
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