Python中的切片

name = [1,2,3,4,5,6,7]

print(name[:])     取整个列表
[1, 2, 3, 4, 5, 6, 7]
print(name[:2])    取前面两个
[1, 2]
print(name[-4:])   从倒数第四个开始取
[4, 5, 6, 7]
print(name[::2])   每2个取一个
[1, 3, 5, 7]
print(name[2:4])   从第三个取到第五个
[3, 4]