Help with Python Multiprocessing

[Anurag]

I am having trouble understanding the Multiprocessing module.
I need to run three different files 'Worker1' , 'Worker2', 'Worker3' all at once. Currently I am doing this :

from multiprocessing import Process

import Worker1.py
import Worker2.py
import Worker3.py



p1 = Process(target=Worker1.py) 
p1.start()
p2 = Process(target=Worker2.py)
p2.start()
p3 = Process(target=Worker3.py)
p3.start()

But this will only start the 'Worker1'. How do I execute all the three files at once?

Thanks