[issue20341] Argument Clinic: add "nullable ints"

[Larry Hastings]

Larry Hastings added the comment:

I guess we should ask Guido for clarification.  But I got the impression that we could *gently* tweak the signatures of functions if they were not representable in Python syntax.  He thought that giving the parameter of _sha1.sha1() a default value of b'' was fine for example, and in the case of itertools.repeat he considered the behavior so odd he was guessing it was a bug.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20341>
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