#### 多線程-非共享數據 對于全局變量，在多線程中要格外小心，否則容易造成數據錯亂的情況發生 ##### 1. 非全局變量是否要加鎖呢？ ~~~ #coding=utf-8 import threading import time class MyThread(threading.Thread): # 重寫 構造方法 def __init__(self,num,sleepTime): threading.Thread.__init__(self) self.num = num self.sleepTime = sleepTime def run(self): self.num += 1 time.sleep(self.sleepTime) print('線程(%s),num=%d'%(self.name, self.num)) if __name__ == '__main__': mutex = threading.Lock() t1 = MyThread(100,5) t1.start() t2 = MyThread(200,1) t2.start() ~~~ 運行結果:  ~~~ import threading from time import sleep def test(sleepTime): num=1 sleep(sleepTime) num+=1 print('---(%s)--num=%d'%(threading.current_thread(), num)) t1 = threading.Thread(target = test,args=(5,)) t2 = threading.Thread(target = test,args=(1,)) t1.start() t2.start() ~~~ 運行結果:  >[warning] 小總結 * 在多線程開發中，全局變量是多個線程都共享的數據，而局部變量等是各自線程的，是非共享的