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, I tried in this way: import re f = open('chem.txt') for line in f: if re.search('C = ',''): print line but i am not getting the desired output. Amrita Kumari Research Fellow IISER Mohali Chandigarh INDIA -- http://mail.python.org/mailman/listinfo/python-list