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：