[PyMOL] using pymol from python script

[John R. <lam...@gm...>]

Hi,
I'm sorry for making such beginner's questions but searching the manual, 
google
or the wiki didn't help me.

I know how to extend pymol by writing python functions (through the 
extend command).
But is it possible to do the opposite? I want to write a script that 
loads a molecule, does something
to it and then displays the pymol window or outputs a png file. I want 
to this without having to
enter commands in the pymol command line, since I need to put these 
operations in a script,
without interactive control on pymol.

Example. I want to write a script examply.py with which I can do

./examply.py mymolecule.xyz

And for output I want to get mymolecule.png or the pymol window with all 
the operations
already done.

Any hints? Thank you.


   John