[issue40437] add string.snake function

[Eric V. Smith]

Eric V. Smith <eric at trueblade.com> added the comment:

What would be the full specification of this? If you want to use it for column names, what happens if the string starts with a $, or some character that can't be used by your particular database?

I'm skeptical that this could be general purpose enough to be used in a wide range of situations, without having a dozen or so parameters to it.

I'm thinking of things like:
- ascii-only?
- result must be a valid python identifier
- certain special characters not allowed anywhere
- certain other special characters not allowed at the start of the string

etc.

We'd need a full specification before deciding to accept this.

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nosy: +eric.smith

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40437>
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