[issue18039] dbm.open(..., flag="n") does not work and does not give a warning

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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resolution: fixed -> 
stage: resolved -> patch review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18039>
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