How to inject variable into scope with a decorator?

Question

[Disclaimer: there may be more pythonic ways of doing what I want to do, but I want to know how python\'s scoping works here]

I\'m trying to find a way to make a dec

Answer 1

Python is lexically scoped, so I'm afraid there is no clean way to do what you want without some potentially nasty side effects. I recommend just passing var into the function via the decorator.

c = 'Message'

def decorator_factory(value):
    def msg_decorator(f):
        def inner_dec(*args, **kwargs):
            res = f(value, *args, **kwargs)
            return res
        inner_dec.__name__ = f.__name__
        inner_dec.__doc__ = f.__doc__
        return inner_dec
    return msg_decorator

@decorator_factory(c)
def msg_printer(var):
    print var

msg_printer()  # prints 'Message'