[issue15373] copy.copy() does not properly copy os.environment

[Andrei Kulakov]

Andrei Kulakov <andrei.avk at gmail.com> added the comment:

I think the advantage of asdict() method is it's more discoverable and it doesn't leave any uncertainty of whether returned value will update environment or not. If a user sees `dict(os.environ)` in code, they may wonder if it does or does not; and there's no obvious way to confirm.

If they see os.environ.asdict(), it will be safe to assume that the method is provided exactly for this purpose, and the way to confirm is obvious - checking the docstring.

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<https://bugs.python.org/issue15373>
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