registry.py

from functools import wraps

# create an empty dict for the registry. 
registry = {}

# a decorator that adds a dict entry 'path': handler_function to the
# registry

def register(path):
    def qregister(handler_function):
        registry[path] = handler_function
        def func_wrapper(request):
            return handler_function(request)
        return wraps(handler_function)(func_wrapper)
    return qregister

# register this function at path /here
@register("/here")
def handler(request):
    print "Handling with request string ",request

# and register this at /there
@register("/there")
def handler2(request):
    print "Handler 2, with req = ",request

# simple registered function caller with no error handling:
def call_registered_function(path, request):
    print "calling function registered at ",path
    f = registry[path]
    print f
    f.__call__(request)

# and test
call_registered_function("/here","hello world")
call_registered_function("/there","/here2/bar/baz")