Package setup best practice style question

[Gerald Britton]

suppose I have a simple python project setup like this:

Project diectory
     prog.py
     pkg directory
          __init__.py
          mod1.py
               class A:

In order to have class A (unqualified) available from prog.py, there are a
few options that I know about.  I'm currently considering two of them and
would like some feedback on best practices.

1. in pkg.__init__.py add:

       from pkg.mod1 import A

    in prog.py add:

       from pkg import A

2. leave __init__.py empty
    in prog.py add:

         from pkg.mod1 import A


Is there a preference or best practice that would indicate to prefer method
1 or method 2?  Are there methods 3, 4, 5, ... that I should consider that
are even better?
-- 
Gerald Britton, MCSE-DP, MVP
LinkedIn Profile: http://ca.linkedin.com/in/geraldbritton