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列表嵌套
l1 = [1,2,'fsafdawsfdsjlkj',[1,'saf',3,]]# print(l1[2])# print(l1[2].upper())l1[2] = l1[2].upper()print(l1) 9‘列表嵌套
l1 = [1,2,'fsafdawsfdsjlkj',[1,'saf',3,]]# print(l1[2])# print(l1[2].upper())l1[2] = l1[2].upper()print(l1) 9‘