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作业

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叫我玮仔

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作业:

a=3
while(a>0):
    print("Hello,",L[a-1],"!")
    a=a-1

问题:

老师,Python没有自增自减运算符么?,本来想写成

a=3
while(a>0):
    print("Hello,",L[--a],"!")

发现运行不了


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