[issue24190] BoundArguments facility to inject defaults

[Yury Selivanov]

Yury Selivanov added the comment:

Well, the docs example only binds explicit defaults in function signature.  Implicit defaults for *args and **kwargs (`()` and `{}`) aren't usually useful (in my opinion).

Do you guys have any good use case for such method?  I use the Signature API extensively for argument types validation and for serialization of RPC calls, but I never needed this functionality from BoundArguments.

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nosy: +brett.cannon, larry

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<http://bugs.python.org/issue24190>
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