[issue19385] dbm.dumb should be consistent when the database is closed

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Additional checks can slowdown the code. It doesn't matter in some operations, but not on __len__, __contains__, etc. EAFP approach is to catch AttributeError and raise appropriate dbm.dumb.error exception.

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nosy: +serhiy.storchaka

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19385>
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