[issue15955] gzip, bz2, lzma: add method to get decompressed size

[Christian Heimes]

New submission from Christian Heimes:

The gzip, bz2 and lzma file reader have no method to get the actual size and compression ratio of a compressed file. In my opinion it's useful to know how much disk space a file will need before it's decompressed.

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components: Library (Lib)
messages: 170598
nosy: christian.heimes, nadeem.vawda
priority: normal
severity: normal
status: open
title: gzip, bz2, lzma: add method to get decompressed size
type: enhancement
versions: Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15955>
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