amr...@iisermohali.ac.in wrote:
It is not giving any value, without any error

ph08...@sys53:~> python trial.py
ph08...@sys53:~>
it is coming out from shell.

Thanks for help.
Amrita

amr...@iisermohali.ac.in wrote:
Sorry to say, but till now I have not got the solution of my problem, I
tried with this command:-

import re


# assuming H = , N = , CA = , HA =  and C = always present in that order
if __name__ == '__main__':
  data = open('chem.txt').readlines()
  for line in data:
    line = line.split('=')
    if not line[5]: # C value missing
     if len(line[2])==1 and len(line[3])==1: # N and CA values missing
        print "all missing", line
      else:
        print "C missing", line

Hi,

I have a file having lines:-

48 ALA H = 8.33 N = 120.77 CA = 55.18 HA = 4.12 C = 181.50
104 ALA H = 7.70 N = 121.21 CA = 54.32 HA = 4.21 C =
85 ALA H = 8.60 N =  CA =  HA = 4.65 C =

Now i want to make two another file in which i want to put those lines
for
which C is missing and another one for which N,CA and C all are
missing,

With these commands:-

import re
f = open('chem.txt')
for line in f:
     if re.search('C = ',line):
        print line

I am getting those lines for which C value is there but how to get
those
one for which it doesn't have any value, i did google search but still
i
am not getting.

Amrita Kumari
Research Fellow
IISER Mohali
Chandigarh
INDIA



--
Bob Gailer
Chapel Hill NC
919-636-4239



Amrita Kumari
Research Fellow
IISER Mohali
Chandigarh
INDIA


If you add a strip() ,method call to Bob's line2 definition, it should work with your data, when read from file.

      line2 = line.strip().split('=')


But you should realize his code assumes the data fits rather rigid rules. Before you use such code, you should make sure the data will fit it correctly.

For example, a blank line will crash the loop. A line with the four variables in some other order will not work. A fifth variable on a line will make it not work.

DaveA

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