PYTHONPATH: dev and prod

[jacopo]

> 1. How you run -- 'launch' -- the code -- from py and from prod
when I have to test I use "python any_script.py"  but in production there is a c++ program that is able to wrap and run python code (the technical details are a bit beyond my knowledge)
 
> 2. What error you get
when I run as "python any_script.py" I get
"ValueError: Attempted relative import in non-package"
I have found this explanation:
http://stackoverflow.com/questions/11536764/attempted-relative-import-in-non-package-even-with-init-py
So I have added at the top of my module:

if __name__=="__main__" and __package__ is None:
     __package__="myscripts"
from ..mylib import MyClass

and I get the error:
SystemError: Parent module 'mylib' not loaded, canno perform relative import

 
> 3. Did you try bundling your modules into a package? What problem
> happened?
What does it mean? what does build mean in this contest? I am not compiling, I just write the .py files.