[issue29446] Improve tkinter 'import *' situation

[Eric V. Smith]

Eric V. Smith added the comment:

Instead of:
__all__ = [name for name in globals() if not name.startswith('_') and name not in {'enum', 're', 'sys', 'wantobjects'}]

Maybe this would be less fragile:
import types
__all__ = [name for name, obj in globals().items() if not name.startswith('_') and not isinstance(obj, types.ModuleType) and name not in {'wantobjects'}]

That is, exclude all modules. Admittedly, I had to import types, but there are other ways to do this test without that import.

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nosy: +eric.smith

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<http://bugs.python.org/issue29446>
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