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Sat Aug 27 17:36:50 CEST 2011 · https://mail.python.org/pipermail/python-dev/2011-August/113198.html

On Sun, Aug 28, 2011 at 1:15 AM, "Martin v. Löwis" <martin at v.loewis.de> wrote:
> This is exactly what I worry about. I think adding file I/O to bz2 was a
> mistake, as this doesn't integrate with Python's IO library (it used
> to, but now after dropping stdio, they were incompatible. Indeed, for
> Python 3.2, BZ2File has been removed from the C module, and lifted to
> Python.
>
> IOW, the _lzma C module must not do any I/O, neither directly nor
> indirectly (through liblzma). The approach of gzip.py (doing IO
> and file formats in pure Python) is exactly right.

PEP 399 also comes into play - we need a pure Python version for PyPy
et al (or a plausible story for why an exception should be granted).

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

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[Python-Dev] LZMA compression support in 3.3