Forgetting "()" when calling methods

[Erik Max Francis]

Alex Martelli wrote:

> I think "if f is None:" and even more "if callable(f):" are
> better ways to express this test -- explicit is better than
> implicit.

I agree wholeheartedly.  I was just giving an real-world example of use
where the "Booleanness" of a function-or-maybe-not-a-function would be
useful.

I personally explicitly do "x is None" tests for anything when I'm
checking for Noneness, this was just as an example.

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