Predicative dispatch decorator for python, based on idea from Functional Programming in Python

Module is providing means to specify condition that determine which function is called. Number of arguments in condition function in @predicate decorator must be equal to number of arguments of wrapped function

usage:

from predicate_dispatch import predicate

@predicate(lambda x: x>1)
def factorial(x):
  return x*factorial(x-1)

@predicate()
def factorial(x):
  return x
        
factorial(5) == 120