L1 = ['Hello','World',18,'Apple',None] L2 = [s.lower() for s in L1 if isinstance(s,str) == True] L3 = [i for i in L1 if isinstance(i,int) == True] L4 = [n for n in L1 if isinstance(n,list) == True] print(L2) print(L3) print(L4)
输出： ['hello', 'world', 'apple'] [18] []
大神真厉害
可以删去==true吧。isinstance()返回值就是boolean吧。
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L1 = ['Hello','World',18,'Apple',None] L2 = [s.lower() for s in L1 if isinstance(s,str) == True] L3 = [i for i in L1 if isinstance(i,int) == True] L4 = [n for n in L1 if isinstance(n,list) == True] print(L2) print(L3) print(L4)
输出： ['hello', 'world', 'apple'] [18] []