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1.手動協(xié)程操作：

				?

									# 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)建一個協(xié)程

									gr2 = greenlet(test2)

									gr1.switch()  # 切換到gr1，也就是運行它

2. 自動協(xié)程，遇到I/O自動切換

				?

									import gevent

									from gevent import monkey; monkey.patch_all()  # 導入monkey，給所有支持的模塊打上補丁，變成非阻塞模塊，也就是使其能夠進行協(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)建一個新的greeenlet對象，并規(guī)劃它去執(zhí)行 test1(3)

									  gevent.spawn(test2,1),

									  gevent.spawn(test3),

									])

結(jié)果：

I'm doing my homework.
I have no time to watch TV.
Life is hard.
Stop thinking!
Keep doing my homework.

3. socket 協(xié)程實例：

服務(wù)器：

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									import socket

									import gevent

									from gevent import monkey

									monkey.patch_all()  # 打補丁，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對象

									  s.bind((ip, port))  # 綁定ip和端口

									  s.listen()      # 設(shè)置監(jiān)聽

									  while True:

									    cli, addr = s.accept()       # 等待連接

									    gevent.spawn(handle_request, cli)  # 對每一個連接，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'))      # 返回數(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)

客戶端：

				?

									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()