[Python-Dev] LZMA compression support in 3.3

[Nadeem Vawda]

On Sat, Aug 27, 2011 at 5:42 PM, "Martin v. Löwis" <martin at v.loewis.de> wrote:
> Not sure whether you already have this: supporting the tarfile module
> would be nice.

Yes, got that - issue 5689. Also of interest is issue 5411 - adding .xz
support to distutils. But I think that these are separate projects that
should wait until the lzma module is finalized.

On Sat, Aug 27, 2011 at 5:40 PM, Antoine Pitrou <solipsis at pitrou.net> wrote:
> On Sun, 28 Aug 2011 01:36:50 +1000
> Nick Coghlan <ncoghlan at gmail.com> wrote:
>> 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).
>
> 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.

Indeed, PEP 399 specifically notes that exemptions can be granted for
modules that wrap external C libraries.

On Sat, Aug 27, 2011 at 5:52 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:
> 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'm not too sure about that - PEP 399 explicitly says that using ctypes is
frowned upon, and doesn't mention anywhere that it should be used in this
sort of situation.

Cheers,
Nadeem