[issue10220] Make generator state easier to introspect

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

Temporarily reopening to remind me to switch from using integer constants to strings (which are much friendlier for debugging purposes).

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status: closed -> open

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10220>
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