nonlocal很重要，不然会报变量作用域的错可以以重新定义变量
def createCounter(): he=0 def counter(): nonlocal he he +=1 return he return counter
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无虑43793
nonlocal很重要，不然会报变量作用域的错可以以重新定义变量
def createCounter(): he=0 def counter(): nonlocal he he +=1 return he return counter