Python--day40--全局解释器锁

1，起一百个线程和起一百个进程所花的时间对比（开启效率的较量）：

import time
from threading import Thread
from multiprocessing import Process

def func(n):
    n+1

if __name__ == '__main__':
    start = time.time()
    t_lst = []
    for i in range(100):
        t = Thread(target=func,args=(i,))
        t.start()
        t_lst.append(t)
    for t in t_lst:t.join()
    t1 = time.time() -start

    start = time.time()
    t_lst = []
    for i in range(100):
        t = Process(target=func, args=(i,))
        t.start()
        t_lst.append(t)
    for t in t_lst: t.join()
    t2 = time.time() - start
    print(t1,t2)

运行结果：

2，多线程可以写input

3，socketserver聊天的例子：

server.py

import socket
from threading import Thread

def chat(conn):
    conn.send(b'hello')
    msg = conn.recv(1024).decode('utf-8')
    print(msg)
    conn.close()

sk = socket.socket()
sk.bind(('127.0.0.1',8080))
sk.listen()

while True:
    conn,addr = sk.accept()
    t = Thread(target=chat,args=(conn,)).start()

sk.close()

client.py

import socket

sk = socket.socket()
sk.connect(('127.0.0.1',8080))

msg = sk.recv(1024)
print(msg)
inp = input('>>>').encode('utf-8')
sk.send(inp)
sk.close()

运行结果：