[issue31025] io.BytesIO: no way to get the length of the underlying buffer without copying data

[Martin Panter]

Martin Panter added the comment:

Can’t you use b.seek(0, SEEK_END)?

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nosy: +martin.panter
versions:  -Python 2.7, Python 3.3, Python 3.4, Python 3.5, Python 3.6

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<http://bugs.python.org/issue31025>
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