Multiprocessing in python

import multiprocessing as mp
process_list = []

def pr1(test,test1):
    """
    @:param: test,test1 (Integer)
    process 1
    """
    print("Pr 1 prining... '"+str(test)+"','"+str(test1)+"' recieved...")

def pr2():
    """
    process 2
    """
    print("Pr2 2 prining...")

def pr3():
    """
    process 3
    """
    print("Pr3 3 prining...")



def initprocess(function_name,args=()):
    """
    @:param function_name: name of the function
    @:param arg: Arguments to pass to function (tuple)

    Init processes and add it to the process list
    t"""
    global process_list
    if args == ():
        process_list.append(mp.Process(target=function_name))
    else:
        process_list.append(mp.Process(target=function_name,args=args))

    return



def run():
    global process_list
    for process in process_list:
        process.start()

def main():
    initprocess(pr1,(1,2,)) #Function with arguments
    initprocess(pr2) #Function without arguments
    initprocess(pr3)
    run()


if __name__ == '__main__':
    main()