list索引
list数据索引
普通索引
list_data = [1, 4, 3, 12, 7, 8, 10, 100, 120]
print(list_data[1:5])
#运行结果:[4, 3, 12, 7]
步长索引
list_data = [1, 4, 3, 12, 7, 8, 10, 100, 120]
#以步长为2进行索引
print(list_data[:5:2])
#运行结果:[1, 3, 7]
反向索引
list_data = [1, 4, 3, 12, 7, 8, 10, 100, 120]
print(list_data[:5:-1])
#运行结果:[120, 100, 10]
反向步长索引
list_data = [1, 4, 3, 12, 7, 8, 10, 100, 120]
print(list_data[:5:-2])
#运行结果:[120, 10]