Generate combinations from a list

makecomb.py

#!/usr/bin/env python

"""
Turn:

a
b
c

into:

a,b
a,c
b,c
"""

import fileinput
import itertools

vs = set()
for line in fileinput.input():
    line = line.strip()
    if not line:
        continue
    vs.add(line)

for a, b in itertools.combinations(sorted(vs), r=2):
    print("{}\t{}".format(a, b))