輸入代碼：list1 = ['physics', 'chemistry', 1997, 2000];print list1;del list1[2];print "After deleting value at index 2 : "print list1;輸出結果：['physics', 'chemistry', 1997, 2000]After deleting value at index 2 :['physics', 'chemistry', 2000]請問，刪除類別第2個數(shù)據(jù)后，為甚輸出結果不是?['physics',1997, 2000]？求教了，感謝~