pep 336: Make None Callable
dave.benjamin at gmail.com
Thu Nov 4 09:03:21 CET 2004
The Eternal Squire wrote:
> None should be a callable object that when called with any
> arguments has no side effect and returns None.
This is how ActionScript works, and to be honest I strongly dislike this
behavior. It hides bugs, and to make things worse, the null often
bubbles up someplace entirely different from where the error initially
occurred. This makes debugging a pain in the ass.
I'd prefer to just write a NullObject if I need one. Otherwise, I like
Python's behavior, which is more fail-fast and less error-prone. IMHO.
But thanks for putting the idea out. I think Objective C does something
similar--is this the case? It does have the convenient effect of
allowing you to pass null as an event listener if you just want to
ignore events from a GUI object, for instance, but it's just not worth
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