[issue6254] tarfile unnecessarily requires seekable files

[Michael K Johnson]

Michael K Johnson <a1237+pybugs at danlj.org> added the comment:

We are doing output, and mode='w|' works.  We were using
tarfile.TarFile, not realizing that the default constructor was an
unsupported and deprecated interface (!?!)

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status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6254>
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