Example use of Guido's Five-minute Multimethods

5mmexample.py

from mm import multimethod

class Scope:
    pass

class GlobalScope(Scope):
    pass

class Statement:
    pass


class Visitor:
    @multimethod(Scope)
    @multimethod(GlobalScope)
    def visit(node):
        print "Scope"

    @multimethod(Statement)
    def visit(node):
        print "Statement"

v = Visitor()
scope = Scope()
globalscope = GlobalScope()
statement = Statement()

v.visit(scope)
v.visit(globalscope)
v.visit(statement)