[Tutor] Modules and Python tutorial by S. Thurlow - opinions please

[Lisi]

I have got myself well and truly bogged down.  I need to change the angle from 
which I am looking.  I only have a short while left for now in which to make 
some sort of progress with Python.  What do people think of:

http://www.sthurlow.com/python/

Is it reasonably accurate and therefore useful?

If not, or even in addition, what can people recommend for me to dig myself 
out of the quagmire?

I am having difficulty with the "wrong" things.  If statements, while or for 
loops etc. don't phase me.  But I am stuck on something so trivial that it is 
ridiculous.  I think that I understand how to write a basic function, but I 
can't work out how to save and call it.

To show you what I mean:
How to save and run a bash script:
Write your script
save it in the normal manner
chmod to x for everyone you want to be able to execute it.  (E.g. where owner 
is root: perhaps 744)
Either move the file into a directory on your path, or add the directory that 
the file is in to your path.
It will now run.

Can anyone point me to a similar set of basic instructions for Python 
modules??

Thanks,
Lisi