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作业

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兔子先森a

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

L1 = ['Hello', 'World', 18, 'Apple', None] L2 = [s.lower() for s in L1 if isinstance(s, str)] print(L2)

寧思進莫思停

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

L = ['Hello', 'World', 18, 'Apple', None] print([s.lower() if isinstance(s,str) else s for s in L if isinstance(s, str)])

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