On Jun 24, 2010, at 5:53 PM, Scott Dial wrote:
On 6/24/2010 5:09 PM, Barry Warsaw wrote:
What use case does this address?
Specifically, it's the use case where we (Debian/Ubuntu) plan on
installing
all Python 3.x packages into /usr/lib/python3/dist-packages. As of
PEP 3147,
we can do that without collisions on the pyc files, but would still
have to
symlink for extension module .so files, because they are always
named foo.so
and Python 3.2's foo.so won't (modulo PEP 384) be compatible with
Python 3.3's
foo.so.
If the package has .so files that aren't compatible with other version
of python, then what is the motivation for placing that in a shared
location (since it can't actually be shared)
Because python looks for .so files in the same place it looks for
the .py files of the same package. E.g., given a module like lxml, it
contains the following files (among others):
lxml/
lxml/__init__.py
lxml/__init__.pyc
lxml/builder.py
lxml/builder.pyc
lxml/etree.so
And you can only put it in one place. Really, python should store
the .py files in /usr/share/python/, the .so files in /usr/lib/x86_64-
linux-gnu/python2.5-debug/, and the .pyc files in /var/lib/python2.5-
debug. But python doesn't work like that.
James
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