to share common PEP 302 support code, as described here:

http://mail.python.org/pipermail/python-dev/2006-April/063724.html

This revision strips all the PEP 302 emulation code from runpy,
replacing it with published API classes and functions in pkgutil,
mostly using setuptools' implementation of common functionality,
but adding features from runpy, and doing some refactoring to make
the layer pydoc needs easier to implement on top of this.

One step down, four to go, although step #4 (adding C versions of
the new APIs to 'imp') may not be able to make it in time for
alpha 2.  We'll see how that goes.

as the latter is not available on Windows 2000.

configure time. The current check is too strict and doesn't allow building
extensions that can only run on newer versions of the OS than the version
python was build for, that is python build for 10.3 or later and an extension
for 10.4. This patch relaxes this check.

This turned out to be a reimplementation of patch 1193190.

Remove translated code hidden inside a comment environment; latex2html gets confused and includes half of it anyway

    /path/to/uninstalled/python setup.py build_ext

now failed with pyconfig.h not found.  Prior to r45232
the above command did not look for pyconfig.h, but the
bug is really in the look-up code: expecting to find it
in os.curdir is a rather fragile idea.

Py_ssize_t argument.

them; they have to be passed to make.

    but wait for a few hours before you read it; I'm still revising it
    and will be tackling contextlib next.
Untabify

always reload the module (specifically, it doesn't reload if the module has
a 'test_main'.)