[issue30262] Don't expose sqlite3 Cache and Statement

[Berker Peksag]

Berker Peksag added the comment:

Even if users somehow managed to create Cache and Statement objects themselves, they are basically implementation details of the module and there is no way to use them to mess with the internal state of the module via using the current API (e.g. Cursor.statement is not exposed)

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stage:  -> patch review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30262>
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