problem writing setup script

[Christian Meesters]

Hi

I have the following file structure

MANIFEST
README
INSTALL -- all text
setup.py
src/
__init__.py
foo.py
for_ext.pyx

and this setup-script:

import sys
from distutils.core import setup
from distutils.extension import Extension
try:
from Pyrex.Distutils import build_ext
except ImportError:
__info__ = """
Please install Pyrex
(http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/)
before running this setup script.
"""
sys.exit(__info__)

setup(
name = "foo",
# snip
packages = ['foo'],
package_dir={'foo': 'src/'},
package_data = {'foo': ['README', 'INSTALL']},
ext_package='foo_ext',
ext_modules = [
Extension("foo_ext", ["src/foo_ext.pyx"])
],
cmdclass = {'build_ext' : build_ext}
)

Typing
sudo python setup.py
runs without warning, however, this results in a file
/usr/lib/python2.5/site-packages/foo/foo.py , which I only can import like
import foo.foo
and not
import foo
in order to access foo's namespace.
Furhtermore a file foo_ext.so will be created
in /usr/lib/python2.5/site-packages, but I would like to see it
in /usr/lib/python2.5/site-packages/foo, since importing foo_ext.so only
makes sense for foo.

Does anybody know how I should change my file structure or the setup-script
to achieve those two goals?

TIA
Christian