python模块 - 心血来潮，想到一些python的解析库，想问问这些的原理是什么？

Answer 1

I remember that the book Python Basic Programming mentioned how to write a text parser.

Python's Lib comes with HTML parsing. HTMLParserI think it will be easier to read this.

Answer 2

Parsing these formats is almost the same as grammatical analysis of compilation principles.

First make the token, and then enter the state machine to generate a parse tree or something.