Python基础（slice切片）

l = ['傻狗1','傻狗2','傻狗3','傻狗4','傻狗5','傻狗6']
print(l[0:3])#['傻狗1', '傻狗2', '傻狗3']

numbers = list(range(100))
print(numbers[0:30:5])#[0, 5, 10, 15, 20, 25]   每5个取一个

nums = tuple(range(5))
print(nums[1:3])#(1, 2)

strs = 'abcdef'
print(strs[::2])#ace    每2个取一个