Python Switch (inspired by http://code.activestate.com/recipes/410692/ )

switch_for.py

def switch(item):
    two = Default()
    one = Case(item, two)
    return (one, two)


class Case(object):
    def __init__(self, item, default):
        self.default = default
        self.skip = False
        self.item = item
        self.fallthrough = False

    def __call__(self, *items):
        if self.item in items:
            self.default.skip = True
            self.fallthrough = True
        return self.fallthrough

class Default(object):
    def __init__(self):
        self.skip = False
        self.fallthrough = False

    def __call__(self, *items):
        if self.skip:
            return False
        if not items:
            self.fallthrough = True
        return self.fallthrough


for case in switch(8):
    if case(3):
        print "three"
    if case(4):
        print "four"
        break
    if case():
        print "default"
    if case(5):
        print "five"
    if case(6):
        print "six"
        break
    if case(7):
        print "No!"

switch_with.py

Break = type("Break", (Exception, ), {})()

class switch(object):
    def __init__(self, item):
        self.item = item
        self.fallthrough = False

    def __call__(self, *items):
        if self.item in items or not items:
            self.fallthrough = True
        return self.fallthrough

    def __enter__(self):
        return self

    def __exit__(self, etype, _, __):
        return etype != Break


with switch(5) as case:
    if case(3):
        print "ohno!"
    if case(4):
        print "really no!"
        raise Break
    if case(5):
        print "hey!"
    if case(6):
        print "You!"
        raise Break
    if case(7):
        print "No!"

But why?