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