L1=L1=['Hello', 'World', 18, 'Apple', None]
L2=[s.lower() for s in L1 if isinstance(s,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
牛顿的烈焰激光剑
L1=L1=['Hello', 'World', 18, 'Apple', None]
L2=[s.lower() for s in L1 if isinstance(s,str)]
print(L2)
if L2 == ['hello', 'world', 'apple']:
print('测试通过!')
else:
print('测试失败!')