Here is a simple example of using multiple processes to print a string.

import multiprocessing

def f():
    print("Hello World!", multiprocessing.current_process())

if __name__ == '__main__':
    processes = [multiprocessing.Process(target=f) for x in range(3)]
    # Creates list of processes -> [proc-1, proc-2, proc-3]
    for i in processes:
        i.start()
    for i in processes:
        i.join()

The .start() method signals the process to begin execution. Alternatively, the .join() method signals for the process to stop once it is done executing the function. The code above printed:

Hello World! <Process name='Process-2' parent=15444 started>
Hello World! <Process name='Process-1' parent=15444 started>
Hello World! <Process name='Process-3' parent=15444 started>