我就废话不多说了，还是直接看代码吧！
from time import ctime
import threading
import time
def a():
#for i in range(5):
print('Program a is running... at ', ctime(),u'.线程名为：',threading.current_thread().name )
time.sleep(0.2)
def b(x):
#for i in range(5):
print('Program b('+x+')
