CSC270 GenerateTruthTable.py

One can use python (or any other language) to easily generate truth tables. This is a simple way to test a hypothesis, or to verify special cases in design situations. Don't hesitate to use this approach to save time and generate accurate results.

# truthtable.py
# D. Thiebaut
# how a simple python program can generate the
# truth table of a boolean function
#
# here are 2 functions of 3 variables
#       _
# f = a.b + c
#     _   _   _
# g = a + b + c

def f( a, b, c ):
    return ( a & (not b) ) | c

def g( a, b, c ):

    return (not a) | (not b) | (not c)

def main():
    print "  a  b  c  |  f  g  "
    print "-----------+--------"
    for a in [ 0, 1 ]:
        for b in [ 0, 1 ]:
            for c in [ 0, 1 ]:
                print "%3d%3d%3d  |%3d%3d" % \
                      ( a, b, c, f( a, b, c ), g( a, b, c ) )                

main()

The output is show below:

  a  b  c  |  f  g  
-----------+--------
  0  0  0  |  0  1
  0  0  1  |  1  1
  0  1  0  |  0  1
  0  1  1  |  1  1
  1  0  0  |  1  1
  1  0  1  |  1  1
  1  1  0  |  0  1
  1  1  1  |  1  0