多任务的执行threading

# pcj
import time
#导入多任务模块
import threading
def sing():
    for i in range(5):
        print("---正在唱歌%i----"%i)
        time.sleep(1)

def dance():
    for i in range(5):
        print("---正在跳舞%i---"% i)
        time.sleep(1)

def main():
    t1=threading.Thread(target=sing)
    t2=threading.Thread(target=dance)
    t1.start()
    t2.start()

if __name__ == '__main__':
    main()