def get(self, fn, *args):
"""get returns the matching function from the virtual namespace.
return None if it did not fund any matching function.
"""
func = Function(fn, self)
return self.function_map.get(func.key(args=args))
def register(self, fn):
"""register the function in the virtual namespace and returns
an instance of callable Function that wraps the
function fn
"""
func = Function(fn, self)
self.function_map[func.key()] = fn
return func
