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

Lark can parse all context-free languages. To put it simply, it means that it is capable of parsing almost any programming language out there, and to some degree most natural languages too.

Scalene: a high-performance, high-precision CPU, GPU, and memory profiler for Python with AI-powered optimization proposals - plasma-umass/scalene

Perforator is a cluster-wide continuous profiling tool designed for large data centers - yandex/perforator

Apache Arrow is a universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics. It contains a set of technologies that enable data systems to efficiently store, process, and move data.

:blue_book: dict subclass with keylist/keypath support, built-in I/O operations (base64, csv, html, ini, json, pickle, plist, query-string, toml, xls, xml, yaml), s3 support and many utilities. - fabiocaccamo/python-benedict

⚡A CLI tool for code structural search, lint and rewriting. Written in Rust - ast-grep/ast-grep

Modern, extensible Python project management

An Experimental Package Management Solution for Python

An extremely fast Python package installer and resolver, written in Rust. - astral-sh/uv

A high-performance Python linter written in Rust. Ruff can replace dozens of static analysis tools, all while executing 10-100x faster.

Textual is a Rapid Application Development framework for Python

Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as necessary.

tox aims to automate and standardize testing in Python. It is part of a larger vision of easing the packaging, testing and release process of Python software.

Python tests inside docstring

Diagrams lets you draw the cloud system architecture in Python code.

Une bibliothèque google pour plusieurs problèmes d'optimisation (n-queen, travel salesman problem, vehicule routing problem, linear optimization, scheduling)