threading using functions python code example

Example 1: how to run same function on multiple threads in pyhton

import multiprocessing

def worker(num):
    """ Worker procedure
    """
    print('Worker:', str(num))

# Mind the "if" instruction!
if __name__ == '__main__':
    jobs = [] # list of jobs
    jobs_num = 5 # number of workers
    for i in range(jobs_num):
        # Declare a new process and pass arguments to it
        p1 = multiprocessing.Process(target=worker, args=(i,))
        jobs.append(p1)
        # Declare a new process and pass arguments to it
        p2 = multiprocessing.Process(target=worker, args=(i+10,))
        jobs.append(p2)
        p1.start() # starting workers
        p2.start() # starting workers

Example 2: multithreading python

class FakeDatabase:
    def __init__(self):
        self.value = 0
        self._lock = threading.Lock()

    def locked_update(self, name):
        logging.info("Thread %s: starting update", name)
        logging.debug("Thread %s about to lock", name)
        with self._lock:
            logging.debug("Thread %s has lock", name)
            local_copy = self.value
            local_copy += 1
            time.sleep(0.1)
            self.value = local_copy
            logging.debug("Thread %s about to release lock", name)
        logging.debug("Thread %s after release", name)
        logging.info("Thread %s: finishing update", name)