利用nonlocal改变外部参数：
def createCounter(): n = 0 def counter(): nonlocal n n += 1 return n return counter 利用可变的list:
def createCounter(): n = [0] def counter(): n[0] += 1 return n[0] return counter
每次调用createCounter() n=[0]不是都会重新初始化吗，为什么是动态的..求个解释
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Pmz丶
利用nonlocal改变外部参数：
def createCounter(): n = 0 def counter(): nonlocal n n += 1 return n return counter 利用可变的list:
def createCounter(): n = [0] def counter(): n[0] += 1 return n[0] return counter