[issue16261] Fix bare excepts in various places in std lib

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Want to make a few warnings. Accepting your confirmation may take a long time. And it is very unlikely that your patch can be applied as a whole. The maintainers of the individual modules can apply it by parts.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16261>
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