Add Share to what you want to share.

    


    
    

        
Now let's run it across 4 different processes.


        

            

                
double(1)

            

            

                
double(2)

            


            

                
Share

                
counter = 0

                
results = []

            


            

                
double(3)

            

            

                
double(4)

            


            
                
                
                
                
            
        


        
Separate memory spaces. Separate CPU cores. Same shared state.

        
And that's all it takes.

    


    
    

        


            

                
Share

                

            


            
vs


            

                
multiprocessing.Manager

                

            


        

    


    
    

        
Nothing to learn. You already know how to use it.

        

        
Write Python. Share state.