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#1 Created at ... [Delete] [Delete and Lock User]

def createCounter():
    n=0
    def counter():
        nonlocal n
        n=n+1
        return n
    return counter

或者

def createCounter():
    global n
    n=0
    def counter():
        nonlocal n
        n=n+1
        return n
    return counter

或

def createCounter():
    n=[0]
    def counter():
        n[0]=n[0]+1
        return n[0]
    return counter

#2 Created at ... [Delete] [Delete and Lock User]

global那种报错了，理由同样是未指定变量n，又在内层函数中加了global声明才通过。