[Python-ideas] Adding an "export" decorator in (e.g.) functools

[dw+python-ideas at hmmz.org]

On Fri, May 09, 2014 at 10:45:33AM +0200, Peter Otten wrote:

> I rarely use star imports, and the decorator is mostly noise in my eyes, so 
> that's a clear -1 from me. 

__all__ also prettifies e.g. pydoc output, which I'd consider a +1.

I'm overall not fond of hiding simple mechanisms using unecessary magic,
especially when the result doesn't generalize to all possible uses of
taht mechanism (e.g. this approach doesn't work for exporting simple
variables).


> def export(f):
>     sys._getframe(1).f_globals.setdefault("__all__", []).append(f.__name__)
>     return f

How about:

    def export(fn):
        mod = sys.modules[fn.__module__]
        lst = vars(mod).setdefault('__all__', [])
        lst.append(fn)
        return fn