Finding the name of a function while defining it

alex23 wuwei23 at gmail.com
Fri Dec 28 02:25:12 CET 2012


On Dec 27, 11:31 pm, Steven D'Aprano <steve
+comp.lang.pyt... at pearwood.info> wrote:
> Unfortunately this doesn't help if you actually need the function name
> *inside* the function

Here's an extension of Steven's original decorator that adds a
reference to the function itself into the function's globals, and then
composes a new function from the component parts:

    import new

    def IdentityAwareFunctionDecorator( fn ):
        _globals = fn.__globals__
        _globals['selffunc'] = fn
        name_aware_func = new.function(
            fn.__code__, _globals, fn.__name__, fn.__defaults__,
fn.__closure__ )
        return name_aware_func

    id = IdentityAwareFunctionDecorator

    @id
    def foo():
        return selffunc.__name__

Unfortunately, it also only knows about the original function name, so
'bar = foo; bar()' will still give you 'foo'.



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