Generate all possible truth table combinations for the given number of inputs. Wrote for students in logic class.

truthgen.py

#!/usr/bin/env python

import sys

if len(sys.argv) != 2:
    print "usage: %s <number of inputs>" % sys.argv[0]
    sys.exit(1)

inputs = int(sys.argv[1])
rows = 2 ** inputs

for x in range(rows):
    print bin(x)[2:].rjust(inputs, '0')