倒序和正序迭代元组和列表

# 元组和列表
a_tupple =(1,4,6,8,89,98,3)
a_list = [16,5,7,87,81,18,66,88,99]
for content in a_tupple:
    print(content)
for content in a_list:
    print(content)

print('############### 迭代出索引 ##############')

for index in range(len(a_list)):
    print('index:',index,'list_item:',a_list[index])

print('############### 如何倒序迭代出索引 ############## 关键字：[::-1]')
for index in range(len(a_list))[::-1]:
    print('index:',index,'list_item:',a_list[index])