Proposal: allow '?' and '!' in identifiers

[Erik Max Francis]

Joshua Marshall wrote:

> Introducing some strange behavior with '!' may very well not be worth
> it.  However, while adding '?' as a legal identifier character does
> not make the Python more expressive, it can make Python programs more
> self-documenting.  The convention of ending predicate function names
> with '?' is useful, in my opinion.

But you don't need to literally have a ? at the end of the identifier to
get the message across if that is your desire.

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