[issue14385] Support other types than dict for __builtins__

[STINNER Victor]

STINNER Victor <victor.stinner at gmail.com> added the comment:

> Note: this protection is not enough to secure Python,
> but it is an important part of a Python sandbox.

Oh, and by the way, I workaround the lack of read-only mapping in pysandbox by removing dict methods: dict.__init__(), dict.clear(), dict.update(), etc. This is a problem because these methods are useful in Python.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue14385>
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