python如何取一定范圍的列表元素呢？
詳情看示例1--3
直接看代碼
1.分片
1 #取一定范圍的元素 2 lucky_number = [0,1,2,3,4,5,6] 3 #分片 4 print(lucky_number[1]) 5 print(lucky_number[-5:-1]) 6 print(lucky_number[0:7])
輸出結果
1 [2, 3, 4, 5] [0, 1, 2, 3, 4, 5, 6]
2.捷徑
1 #取一定范圍的元素 2 lucky_number = [0,1,2,3,4,5,6] 3 #捷徑 4 print(lucky_number[-4:]) 5 print(lucky_number[-5:])
輸出結果
[3, 4, 5, 6]
[2, 3, 4, 5, 6]
3.步長
1 #取一定范圍的元素 2 lucky_number = [0,1,2,3,4,5,6] 3 #步長 4 print(lucky_number[0:7:2]) 5 print(lucky_number[::2]) 6 print(lucky_number[::-2])
輸出結果
[0, 2, 4, 6] [0, 2, 4, 6] [6, 4, 2, 0]