[docs] [issue15148] shutil.which() docstring could be clearer

Alexander Belopolsky <alexander.belopolsky@gmail.com> added the comment:

Alexander, can you explain the part about finding a file on PYTHONPATH?

I thought about something like this:

...

...

shutil.which('shutil.py', os.F_OK, ':'.join(sys.path)) '/Users/sasha/Work/python-hg/py3k/Lib/shutil.py'

but win32 code seems to assume a search for a command. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue15148> _______________________________________