[Python-Dev] Proposing PEP 376

[P.J. Eby]

At 11:33 AM 4/7/2010 -0500, Ian Bicking wrote:
>On Wed, Apr 7, 2010 at 9:40 AM, Tarek Ziadé 
><<mailto:ziade.tarek at gmail.com>ziade.tarek at gmail.com> wrote:
>so for the PEP :
>
>- sys.prefix -> the installation prefix provided by --prefix at
>installation time
>- site-packages -> the installation libdir, provided by --install-lib
>at installation time
>
>
>How do you actually calculate site-packages? Â Would you store the 
>directory name somewhere? Â Would you import the module and look at 
>os.path.dirname(os.path.dirname(module.__file__))? Â Or just scan to 
>see where the module would be?
>
>If you store the directory name somewhere then you have another 
>absolute path. Â This is why, for simplicity, I thought it should be 
>relative to the directory where the record file is (lots of 
>extraneous ../, but the most obvious meaning of a relative filename).

The paths are relative to the sys.path entry for which the metadata 
applies - that's how you get to finding the .dist-info in the first 
place, so that's what you os.path.join to the paths in the record.

There's no "storing" of the directory name needed.