Callable assertion?

[Lulu of the Lotus-Eaters]

"Terry Reedy" <tjreedy at udel.edu> wrote previously:
|The acid test is to try calling it:
|try: param()
|except TypeError, msg: <do whatever>

This is usually a bad idea though.  Many, if not most, things you call
can either have side effects and/or consume non-trivial resources (time,
memory, especially).

For example, you don't want to change state by making a call if you know
you are not ready for that state change until something else happens.
But you may want to know whether 'param' is callable before you bother
with the setup code.

Yours, Lulu...

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