threading

code: python

import threading

import time

from random import randint

class Counter:

def __init__(self):

self.count = 0

self.lock = threading.Lock()

def increment(self):

with self.lock:

current = self.count

time.sleep(0.1)

self.count = current + 1

def worker(thread_id, counter):

print(f"Thread {thread_id} starting")

for _ in range(3):

counter.increment()

time.sleep(randint(1, 3) / 10)

print(f"Thread {thread_id} finished")

def main():

counter = Counter()

threads = []

for i in range(5):

thread = threading.Thread(target=worker, args=(i, counter))

threads.append(thread)

thread.start()

for thread in threads:

thread.join()

print(f"Final counter value: {counter.count}")

if __name__ == "__main__":

main()

# Thread 0 starting

# Thread 1 starting

# Thread 2 starting

# Thread 3 starting

# Thread 4 starting

# Thread 2 finished

# Thread 1 finished

# Thread 0 finished

# Thread 4 finished

# Thread 3 finished

# Final counter value: 15