# pip install gevent
from greenlet import greenlet

def test():
  print('He ')
  gr2.switch() # 切換到test2
  print('a ')
  gr2.switch()

def test2():
  print('is ')
  gr1.switch()
  print('student.')

gr1 = greenlet(test)  # 創(chuàng)建一個(gè)協(xié)程
gr2 = greenlet(test2)
gr1.switch()  # 切換到gr1，也就是運(yùn)行它

import gevent
from gevent import monkey; monkey.patch_all()  # 導(dǎo)入monkey，給所有支持的模塊打上補(bǔ)丁，變成非阻塞模塊，也就是使其能夠進(jìn)行協(xié)程操作
def test1(n):
  print("I'm doing my homework.")
  gevent.sleep(n)     # 模擬I/O操作，gevent自動(dòng)切換
  print('Keep doing my homework.')

def test2(n):
  print("I have no time to watch TV.")
  gevent.sleep(n)
  print('Stop thinking!')

def test3():
  print("Life is hard.")

# 等待 greenlets 全部結(jié)束
gevent.joinall([
  gevent.spawn(test1,3), # 創(chuàng)建一個(gè)新的greeenlet對(duì)象，并規(guī)劃它去執(zhí)行 test1(3)
  gevent.spawn(test2,1),
  gevent.spawn(test3),
])

import socket
import gevent
from gevent import monkey
monkey.patch_all()  # 打補(bǔ)丁，讓所有支持的模塊變成非阻塞的方法

def server(ip,port):
  s = socket.socket()  # 生成socket對(duì)象
  s.bind((ip, port))  # 綁定ip和端口
  s.listen()      # 設(shè)置監(jiān)聽(tīng)
  while True:
    cli, addr = s.accept()       # 等待連接
    gevent.spawn(handle_request, cli)  # 對(duì)每一個(gè)連接，使用協(xié)程的方法生成greenlet

def handle_request(conn):
  try:
    while True:
      data = conn.recv(1024)  # 接收數(shù)據(jù)
      print("recv:", data)
      new = 'Hello '+ data.decode().title()
      conn.send(new.encode('utf8'))      # 返回?cái)?shù)據(jù)
      if not data:
        conn.shutdown(socket.SHUT_WR)
  except Exception as e:
    print(e)
  finally:
    conn.close()
if __name__ == '__main__':
  server('localhost',9999)

import socket
client = socket.socket()
client.connect(('localhost',9999))
while True:
  con = input('>>>:').strip()
  if len(con) ==0: continue
  client.send(con.encode('utf-8'))
  data = client.recv(1024)
  print(data.decode())
client.close()