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交作业

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yg不嚣张

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

L1=['Hello','World',18,'Apple',None]

L2=[x.lower() for x in L1 if isinstance(x,str)]

print(L2)

if L2 == ['hello','world','apple'] :

    print('test pass')

else :

    print('test failure')


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