NumTut corrupted

[r.e.s.]

"Peter Hansen" wrote ...
> "r.e.s." wrote:
> > 
> > No matter which site I download it from,
> > NumTut.tgz appears to be corrupted.
> > Anyone else having this problem?
> 
> Always describe the symptoms of a problem... what precise
> behaviour (i.e. what extraction program, platform etc.) are
> you encountering that leads you to believe it's corrupted?

Quite right, sorry. 
 
I resolved the problem, but will explain what happened 
in case others encounter something similar ...

The file called NumTut.tgz at the SourceForge.net 
download server is, when downloaded, automatically 
receiving the wrong file extension by winXP . 
(WinZip then produces a file that looks like a .py
file corrupted by lots of 'unprintable' characters.)

That is, clicking NumTut.tgz for download results in 
"You are requesting file: /numpy/NumTut.tgz
Please select a mirror"

but the winXP File Download window that comes up says
   File name:  NumTut.gz   (sic)
   File type:  WinZip File

If renamed back to .tgz, WinZip decompresses it 
properly, and I see that it's actually a number of 
files which are python-importable when placed in 
the folder ...\Numerical\NumTut.

(Also for other files from that site, I've sometimes
had to re-download when the file is found not to be
in recognizable format. This problem seems to occur 
only for files downloaded from SourceForge, btw.)

=====
A related python question, if I may ...

With the various .py files in \Numerical\NumTut, 
*none* of which are named NumTut.py, why does this
work? ...

    >>> from NumTut import *

Surely import doesn't use the folder name?  As you 
can see, I'm a beginner at python.

Thanks.
--
r.e.s.