爬取需求：

Snowflake 2015-2020 年特性发布的目录

https://docs.snowflake.com/en/release-notes/2015-11.html

实现

• 用变量 year month 实现不同年和月的 release note
• 用 requests 请求 snowflake 官网文档
• 将返回的 HTML 进行正则解析
• 解析完毕后存到 Snowflake-ReleaseNote-2015-2020.md

希望输出：

ReleaseNote.md

2018-05

new feature ...

2018-04

new feature ...

运行方法：

python index.py

output:

开始写入数据 ====> ['Behavior Changes', 'TRUNCATE No Longer Deletes Files in Table Stage', 'Table Stages in SQL Commands Require Explicit Syntax', 'Timestamp Changes', 'Impact on Existing Accounts', 'SQL Enhancements and Fixes', 'Changes to Casting of Strings into Numbers', 'New Functions', 'Support for Changing Account Parameters']
https://docs.snowflake.com/en/release-notes/2015-06.html