def a(i):
    t = threading.Thread(target=b, args=(i,))
    t.start()
def b(i):
    for j in range(100):
        print i


if __name__ == '__main__':
    for i in range(100):
        t = threading.Thread(target=a, args=(i,))
        t.start()
        t.join()

代碼如上, 加了join,按理說是應(yīng)該阻塞.但運(yùn)行結(jié)果不是我預(yù)期的順序1111...,2222...,3333...
如果沒有子線程,也就是a函數(shù)里直接調(diào)用b的話,就是我預(yù)期的按順序的結(jié)果. 求解惑