django parameter type decorator

typecheck.py

#!/usr/bin/python
# coding: utf-8
# ref: http://stackoverflow.com/questions/582056/getting-list-of-parameters-inside-python-function

import inspect
def base(name, ptype, required):
    def deco(fun):        def gun(*args, **kwargs):            frame = inspect.currentframe()            _, _, _, values = inspect.getargvalues(frame)            try:                if required:                    values[name] = ptype(values[name])
            except Exception, e:
                raise e
            return fun(*args, **kwargs)
        return gun
    return deco

def required(name, ptype):
    return base(name, ptype, True)

def option(name, ptype):
    return base(name, ptype, False)