[Python-Dev] LZMA compression support in 3.3 (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Sat Aug 27 19:36:01 CEST 2011

On Sat, 27 Aug 2011 18:50:40 +0200 Antoine Pitrou <solipsis at pitrou.net> wrote:

On Sun, 28 Aug 2011 01:52:51 +1000 Nick Coghlan <ncoghlan at gmail.com> wrote: > > > > The plausible story being that we basically wrap an existing library? > > I don't think PyPy et al have pure Python versions of the zlib or > > OpenSSL, do they? > > > > If we start taking PEP 399 conformance to such levels, we might as well > > stop developing CPython. > > It's acceptable for the Python version to use ctypes in the case of > wrapping an existing library, but the Python version should still > exist.

I think you're taking this too seriously. Our extension modules (bz2, ssl...) are already optional even on CPython. If the library or its development headers are not available on the system, building these extensions is simply skipped, and the test suite passes nonetheless. The only required libraries for passing the tests being basically the libc and the zlib.

...and, apparently, pyexpat...

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