Forbidden Fruit is one crafty library

forbidden.py

from forbiddenfruit import curse, reverse

# add method to int type
def words_of_wisdom(self):
    return self * "blah "

curse(int, "words_of_wisdom", words_of_wisdom)

# add classmethod
def hello(self):
    return "blah"

curse(str, "hello", classmethod(hello))

# remove the curse
reverse(str, "hello")