Python多个用户同时附加到同一文件

import fcntl

with open('example.txt', 'a') as f:
    fcntl.flock(f, fcntl.LOCK_EX)
    f.write('Hello, world!\n')
    fcntl.flock(f, fcntl.LOCK_UN)

import threading

def write_to_file(text):
    with open('example.txt', 'a') as f:
        f.write(text + '\n')

threads = []
for i in range(10):
    t = threading.Thread(target=write_to_file, args=('Hello, world!',))
    threads.append(t)
    t.start()

for t in threads:
    t.join()

import multiprocessing

def write_to_file(text):
    with open('example.txt', 'a') as f:
        f.write(text + '\n')

processes = []
for i in range(10):
    p = multiprocessing.Process(target=write_to_file, args=('Hello, world!',))
    processes.append(p)
    p.start()

for p in processes:
    p.join()

import redis
import time

r = redis.Redis(host='localhost', port=6379, db=0)
lock = r.lock('example_lock')

while True:
    with lock:
        with open('example.txt', 'a') as f:
            f.write('Hello, world!\n')
    time.sleep(1)