Astronomy--Programs to Compute Siderial Time?

[W. eWatson]

W. eWatson wrote:
> Is there a smallish Python library of basic astronomical functions? 
> There are a number of large such libraries that are crammed with 
> excessive functions not needed for common calculations.
It looks like I've entered a new era in my knowledge of Python. I found 
a module somewhat like I want, siderial.py. You can see an intro to it 
at <http://infohost.nmt.edu/tcc/help/lang/python/examples/sidereal/ims//>.
It appears that I can get the code for it through section 1.2, near the 
bottom. I scooped it siderial.py up, and placed it in a corresponding 
file of the same name and type via NotePad. However, there is a xml file 
below it. I know little about it. I thought maybe I could do the same, 
but Notepad didn't like some characters in it. As I understand Python 
doc files are useful. So how do I get this done, and where do I put the 
files?