爬虫（Web Scraping）是指通过编程自动化地获取互联网上的信息的过程。爬虫的目的通常是从网页中抓取数据，进行数据分析、处理或展示。
Lost connection to MySQL server…
[ERROR] InnoDB: Expected to open 3 undo tablespaces but was able to find only 0 undo tablespaces. Set the innodb_undo_tablespaces parameter to the correct value and retry. Suggested value is 0
ERROR 1418 (HY000): This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and binary logging is enabled (you *might* want to use the less safe log_bin_trust_function_creators variable)
Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column.
程序员专属段子集锦（1~10）
Error 1390 (HY000): Prepared statement contains too many placeholders
装饰器模式：属于结构型模式，作为现有的类的一个包装，向一个现有的对象添加新的功能，同时又不改变其结构。
适配器模式：属于结构型模式，结合了两个独立接口的功能，作为 两个不兼容的接口之间的桥梁 。
设计模式 -- 工厂模式（Factory Pattern）
