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）：
1 import time 2 from threading import Thread 3 from multiprocessing import Process 4 5 def func(n): 6 n+1 7 8 if __name__ == '__main__': 9 start = time.time() 10 t_lst = [] 11 for i in range(100): 12 t = Thread(target=func,args=(i,)) 13 t.start() 14 t_lst.append(t) 15 for t in t_lst:t.join() 16 t1 = time.time() -start 17 18 start = time.time() 19 t_lst = [] 20 for i in range(100): 21 t = Process(target=func, args=(i,)) 22 t.start() 23 t_lst.append(t) 24 for t in t_lst: t.join() 25 t2 = time.time() - start 26 print(t1,t2)
运行结果：
2，多线程可以写input
3，socketserver聊天的例子：
server.py
1 import socket 2 from threading import Thread 3 4 def chat(conn): 5 conn.send(b'hello') 6 msg = conn.recv(1024).decode('utf-8') 7 print(msg) 8 conn.close() 9 10 sk = socket.socket() 11 sk.bind(('127.0.0.1',8080)) 12 sk.listen() 13 14 while True: 15 conn,addr = sk.accept() 16 t = Thread(target=chat,args=(conn,)).start() 17 18 sk.close()
client.py
1 import socket 2 3 sk = socket.socket() 4 sk.connect(('127.0.0.1',8080)) 5 6 msg = sk.recv(1024) 7 print(msg) 8 inp = input('>>>').encode('utf-8') 9 sk.send(inp) 10 sk.close()
运行结果：
