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pallets/flask

This system is a Python web framework that provides a modular, extensible foundation for building web applications and APIs. It supports background task processing via Celery integration and enables dynamic client-side interactions through templated JavaScript examples. The framework emphasizes modern development practices by offering a pluggable JSON provider, strict type checking, and a reorganized internal architecture that separates core logic from I/O operations.

68.2

Adequate · 2 August 2026

8k

lines of production code

Python

primary language

3

bus factor · 857 authors in all

3

measurements over time

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How it got here

2010 · Flask 3.2.0 upgrade and example cleanup

The project upgraded to Flask 3.2.0, adopting significant behavioral changes such as context merging and redirect defaults, while removing deprecated features and example applications. Concurrently, the test suite was expanded with new fixtures for template rendering and static file handling to ensure compatibility with the updated framework.

6 changes

2014–2018 · Test coverage and example enhancements

This period focused on expanding test coverage and improving example applications. The test suite was reorganized with shared fixtures and helper apps, while the Flaskr tutorial and JavaScript examples were updated with comprehensive tests and modern practices.

8 changes

2019–2023 · Architecture modernization and tooling

The project underwent a significant structural overhaul, extracting the core application logic into a reusable sansio module and reorganizing the codebase into a proper Python package. This period also introduced a pluggable JSON provider for serialization and modernized the build tooling with pyproject.toml and uv, while adding development environment support via VS Code devcontainers.

6 changes

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About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 2 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit 6a2f545bfd — the exact code this score is about.
  • Scored under rubric rubric-2026.08.18. Score the same commit under that rubric and you get the same number.
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