Newbie OOP question

[Ed]

I'm trying to create an OOP script but havn't quite figured out to do it.
Here's and example of what I'm trying to do.

1st file. DOG.py

class DOG:
  def printName(self):
    print "DOG"

2nd file:  runDog.py

#!/usr/bin/python
import sys
from Commands import *
x = Commands()
a.printName()


when I run runDog.py ./runDOG.py it keeps coming up with an AttributeError:
class Commands has no attribute 'printName"

What am I doing wrong?

thanks!
Ed
When