Python多线程threading模块用法实例分析

#coding=utf-8
import time
def saySorry():
  print('跑一圈')
  time.sleep(1)
if __name__ == "__main__":
  for i in range(5):
    saySorry()

#coding=utf-8
import threading
import time
def saySorry():
  print('跑一圈')
  time.sleep(1)
if __name__ == "__main__":
  for i in range(5):
    t = threading.Thread(target=saySorry)
    t.start()#启动线程

#coding=utf-8
import threading
from time import sleep,ctime,time
def run():
  for i in range(3):
    print('在跑步．．．%d'%i)
    sleep(1)
def sing():
  for i in range(3):
    print('在唱歌．．．%d'%i)
    sleep(1)
if __name__ == "__main__":
  print('------start------' + ctime())
  t1 = threading.Thread(target=run)
  t2 = threading.Thread(target=sing)
  t1.start()#启动线程
  t2.start()
  # sleep(5)# 屏蔽此行代码，试试看，程序是否会立即结束？
  print('------stop------' + ctime())

#coding=utf-8
import threading
from time import sleep,ctime,time
def run():
  for i in range(3):
    print('在跑步．．．%d'%i)
    sleep(1)
def sing():
  for i in range(3):
    print('在唱歌．．．%d'%i)
    sleep(1)
if __name__ == "__main__":
  print('------start------' + ctime())
  t1 = threading.Thread(target=run)
  t2 = threading.Thread(target=sing)
  t1.start()#启动线程
  t2.start()
  while True:
    length = len(threading.enumerate())
    print('当前运行的线程数为:' , length , ctime())
    if length <= 1:
      break
  # sleep(5)# 屏蔽此行代码，试试看，程序是否会立即结束？
  print('------stop------' + ctime())

#coding=utf-8
import threading
import time
class MyThread(threading.Thread):
  def run(self):
    for i in range(3):
      time.sleep(1)
      msg = 'ｉ am '+self.name+'@'+str(i) #name属性中保存的是当前线程的名字
      print(msg)
if __name__ == "__main__":
  t = MyThread()
  t.start()

#coding=utf-8
import threading
import time
class MyThread(threading.Thread):
  def run(self):
    for i in range(3):
      time.sleep(1)
      msg = 'ｉ am '+self.name+'@'+str(i) #name属性中保存的是当前线程的名字
      print(msg)
def test():
  for i in range(5):
    t = MyThread()
    t.start()
if __name__ == "__main__":
  test()

#coding=utf-8
import threading
import time
g_num = 100
def work1():
  global g_num
  for i in range(3):
    g_num+=1
  print('work1 --- num = %d'%g_num)
def work2():
  global g_num
  print('work2 --- num = %d'%g_num)
if __name__ == "__main__":
  print('---start------g_num = %d'%g_num)
  t1 = threading.Thread(target=work1)
  t1.start()
  # 延时一会，保证t1线程中的事情做完
  time.sleep(1)
  t2 = threading.Thread(target=work2)
  t2.start()