This is basically the same as Levon’s answer, but slightly more compact and Pythonic, and with the numbers adjusted to a guess at what I suspect the OP is trying to do.
with open('data.txt') as inf:
for lc, line in enumerate(inf): # lc - current line count
if lc >= 2: # netstat usually has 2 lines of header info
print ' '.join(line.split()[3:5]) # cols 3-4 are the addresses
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solved Filtering files with python [closed]