[issue9759] GzipFile object should raise ValueError on .read() after .close()

[Jeffrey Finkelstein]

Jeffrey Finkelstein <jeffrey.finkelstein at gmail.com> added the comment:

Here's the updated patch, which checks whether the file is closed on each call to read(), write(), and flush(), along with a test.

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Added file: http://bugs.python.org/file18893/issue9759.patch

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