def do_binaryop(msg, n1, n2, op):
  res = op(n1, n2)
  print("%s %g" % (msg, res))

# Usage (i.e. client code)
addlambda = lambda a, b: a + b
sublambda = lambda a, b: a - b
do_binaryop("Sum", 10, 7, addlambda)
do_binaryop("Diff", 10, 7, sublambda)

do_binaryop("Mult", 10, 7, lambda a, b: a * b)
do_binaryop("Div",  10, 7, lambda a, b: a / b)