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 = CA = 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 expr = re.compile("C = None") f = open("helix.dat") for line in f: if expr.search(line): print line but i am not getting the desired output. Amrita Kumari Research Fellow IISER Mohali Chandigarh INDIA _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor