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  1. # your code goes here
  2.  
  3.  
  4. L1 = ['Hello', 'World', 18, 'Apple', None]
  5. L2 = [s.lower() for s in L1 if isinstance(s,str) ]
  6.  
  7. # 测试:
  8. print(L2)
  9. if L2 == ['hello', 'world', 'apple']:
  10.     print('测试通过!')
  11. else:
  12.     print('测试失败!')
  13. # your code goes here
Success #stdin #stdout 0.09s 14172KB
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stdin
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Standard input is empty
stdout
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['hello', 'world', 'apple']
测试通过!
https://ideone.com/RSxwc2
language:
Python 3 (python  3.12)
created:
5 days ago
visibility:
public

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