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('测试通过!') else: print('测试失败!')
Sign in to make a reply
_落尘Lc
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('测试通过!') else: print('测试失败!')