为什么只能有一个线程被执行和其他不

Question

import threading,time 

def auto2(): 

    while 1: 
     print ("hello master") 
     time.sleep(2) 

def auto1(): 

    while 1: 
     print "hello" 
     time.sleep(3) 

x=threading.Thread(target=auto1(),args=()) 

y=threading.Thread(target=auto2(),args=()) 

x.start() 

y.start() 

Answer 1

import threading, time 
def auto2(): 
    while 1: 
     print("hello master") 
     time.sleep(2) 
def auto1(): 
    while 1: 
     print ("hello") 
     time.sleep(3) 
x = threading.Thread(target=auto1) 
y = threading.Thread(target=auto2) 
x.start() 
y.start() 

目标=自动1（） - >目标= AUTO1