Dynamic Python x JavaScript

call_dynamically.py

getattr(drew, "battle_cry")()

change_class.py

def battle_cry(self):
    print "%s says zing!!!" % self.name

Ninja.battle_cry = battle_cry

drew.battle_cry()
# Drew says zing!!!
adam.battle_cry()
# Adam says zing!!!

closure_method.py

color_name = 'black'

def color(self):
    print "%s's color is %s" % (self.name, color_name)

Ninja.color = color

drew.color()
# Drew's color is black
adam.color()
# Adam's color is black

instance_closure.py

sword_symbol = "*********"

def swing(self, sound_effect):
    print "%s: %s %s" % (self.name, sword_symbol, sound_effect)

drew.swing = new.instancemethod(swing, drew, Ninja)

drew.swing('slash!!')

instance_specific.py

def throw_star(self):
    print "throwing a star"

import new
drew.throw_star = new.instancemethod(throw_star, drew, Ninja)

drew.throw_star()

setup.py

class Ninja(object):
    def __init__(self, name):
        self.name = name

drew = Ninja("Drew")
adam = Ninja("Adam")