def foo(data):
if isinstance(data, int):
print 'you entered an integer'
elif isinstance(data, str):
print 'you entered a string'
else:
raise TypeError, 'only integers or strings!'
from operator import *
vec1 = [12, 24]
vec2 = [2, 3, 4]
opvec = (add, sub, mul, div)
for eachOp in opvec:
for i in vec1:
for j in vec2:
print '%s(%d, %d) = %d' % (eachOp.__name__, i, j, eachOp(i, j))