Top 3 Python Parser Library Projects

Lark

35 4,471 7.5 Python

Lark is a parsing toolkit for Python, built with a focus on ergonomics, performance and modularity.

Project mention: Show HN: I wrote a RDBMS (SQLite clone) from scratch in pure Python | news.ycombinator.com | 2023-08-13

Lark supports, and recommends, writing and storing the grammar in a .lark file. We have syntax highlighting support in all major IDEs, and even in github itself. For example, here is Lark's built-in grammar for Python: https://github.com/lark-parser/lark/blob/master/lark/grammar...
You can also test grammars "live" in our online IDE: https://www.lark-parser.org/ide/
The rationale is that it's more terse and has less visual clutter than a DSL over Python, which makes it easier to read and write.

TatSu

4 391 9.0 Python

竜 TatSu generates Python parsers from grammars in a variation of EBNF
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parse_it

0 107 7.2 Python

A python library for parsing multiple types of config files, envvars & command line arguments that takes the headache out of setting app configurations.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).