Multiprocessing Can't pickle local object

[law]

I finally decided to experiment on the multiprocessing module, however I run straight into a ditch where am currently hitting my head against it's walls. I desperately need some help to get out of this, here is an example of my code structure:-

import time 
import multiprocessing

    

def vcf():
        
        d='578'      
        d1='556'       
        e='678'
        e1='64498'
        
        def abc(d,e):
                
                print(d)
                print(e)
          
        def cab(d1,e1):
        
                print(d1)
                print(e)

            
        p1 = multiprocessing.Process(target=abc,args=(d,e,))
        p2 = multiprocessing.Process(target=cab,args=(d1,e1,))
        if __name__ == "__main__":
                
                p1.start()
                p2.start()
                
                p1.join()  
                p2.join()   

vcf()

finish = time.perf_counter()
print("Finished running after seconds : ",finish)

How do I make it to run while maintaining this structure, that is without moving def abc and def cab to the Top Level Function

[law]

Incase anyone else faces the same error with the same code structure, adding global keyword word to the child function before you define it eliminates the error. I have no idea why or how it works, but it works...

import time 
import multiprocessing
 
     
 
def vcf():
        global abc
        global cab

        d='578'      
        d1='556'       
        e='678'
        e1='64498'
         
        def abc(d,e):
                 
                print(d)
                print(e)
           
        def cab(d1,e1):
         
                print(d1)
                print(e)
 
             
        p1 = multiprocessing.Process(target=abc,args=(d,e,))
        p2 = multiprocessing.Process(target=cab,args=(d1,e1,))
        if __name__ == "__main__":
                 
                p1.start()
                p2.start()
                 
                p1.join()  
                p2.join()   
 
vcf()
 
finish = time.perf_counter()
print("Finished running after seconds : ",finish