typed-ast
a fork of Python 2 and 3 ast modules with type comment support
Decision gist · record as of 2026-08-14
No. Do not install typed_ast for new projects. The package is abandoned and superseded entirely by the standard library `ast` module in Python 3.8+. If you encounter it as a transitive dependency, work with maintainers to remove it. For Python 3.6–3.7 projects, migrate to the standard `ast` module where possible; typed_ast offers no advantages on modern Python versions.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Project is no longer maintained; Python 3.8+ users should use the standard library `ast` module instead.
- Medium install friction due to compiled wheels for multiple platforms.
- Project is abandoned as of 2023-07-03 with no further maintenance; the standard library `ast` module in Python 3.8+ supersedes all functionality.
License · maintenance · safety
Apache License 2.0 (permissive) — Apache License 2.0 is permissive, allowing use in most contexts without significant restriction.
last release 2023-07-04 (1137 days) · last repo commit 2023-07-03 · 233 stars · archived
0 known vulnerabilities (OSV.dev, 2026-08-14) · 4,348,443 downloads/mo, #2,325 on PyPI
Alternatives
Verify before relying
pip install typed-ast==1.5.5
import typed_ast.ast3 as ast
tree = ast.parse('x: int = 5', mode='exec', feature_version=(3, 7))- Whether any downstream packages still actively depend on typed_ast or if migration paths are documented.
- Performance characteristics compared to the standard library `ast` module on modern Python versions.
What it is and what it does
typed_ast is an abandoned Python package that provided AST (abstract syntax tree) parsers for Python 2.7 and Python 3 code with support for PEP 484 type comments. It was designed to parse type annotations in comments, a feature that predated Python's native type hint syntax. The parsers were independent of the Python version running them, allowing you to parse code written for different Python versions from a single environment.
The package is no longer maintained and should not be used for new projects. Python 3.8 and later versions incorporated all of typed_ast's functionality into the standard library `ast` module, making typed_ast obsolete. The project's repository is archived, with the last commit on 2023-07-03. If you encounter typed_ast as a dependency, migration to the standard library is strongly recommended.
Use it for
- Legacy projects that parse Python 2.7 code with type comments from a Python 3 environment (use standard `ast` if possible).
- Tools that need to extract type information from older codebases written before native type hints existed.
- Transitional codebases migrating from Python 2 to Python 3 that need unified parsing logic.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
No.
Do not install typed_ast for new projects. The package is abandoned and superseded entirely by the standard library `ast` module in Python 3.8+. If you encounter it as a transitive dependency, work with maintainers to remove it. For Python 3.6–3.7 projects, migrate to the standard `ast` module where possible; typed_ast offers no advantages on modern Python versions.
Install
typed-ast on PyPI
Before you install
Medium install friction due to compiled wheels for multiple platforms. Project is abandoned as of 2023-07-03 with no further maintenance; the standard library `ast` module in Python 3.8+ supersedes all functionality.
Project is no longer maintained; Python 3.8+ users should use the standard library `ast` module instead.
License in practice
Apache License 2.0 is permissive, allowing use in most contexts without significant restriction.
Quickstart
pip install typed-ast==1.5.5
import typed_ast.ast3 as ast
tree = ast.parse('x: int = 5', mode='exec', feature_version=(3, 7))Verify before relying
- Whether any downstream packages still actively depend on typed_ast or if migration paths are documented.
- Performance characteristics compared to the standard library `ast` module on modern Python versions.
Package facts
| License | Apache License 2.0 permissive |
| Python support | Supports the current Python release >=3.6 |
| Install friction | Medium. Platform-specific wheel |
| Runtime dependencies | None |
| Maintenance | Abandoned 1,137 days since the last release |
| Last repo commit | repository archived |
| First released | |
| Downloads | 4,348,443 / month, #2,325 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 7 - InactiveEnvironment :: ConsoleIntended Audience :: DevelopersOperating System :: MicrosoftOperating System :: POSIXProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Topic :: Software Development |
Evidence: typed_ast-1.5.5-cp310-cp310-macosx_10_9_x86_64.whl; typed_ast-1.5.5-cp310-cp310-macosx_11_0_arm64.whl; typed_ast-1.5.5-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl; typed_ast-1.5.5-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; typed_ast-1.5.5-cp310-cp310-musllinux_1_1_aarch64.whl; typed_ast-1.5.5-cp310-cp310-musllinux_1_1_x86_64.whl; typed_ast-1.5.5-cp310-cp310-win_amd64.whl; typed_ast-1.5.5-cp311-cp311-macosx_10_9_x86_64.whl; typed_ast-1.5.5-cp311-cp311-macosx_11_0_arm64.whl; typed_ast-1.5.5-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl; typed_ast-1.5.5-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; typed_ast-1.5.5-cp311-cp311-musllinux_1_1_aarch64.whl; typed_ast-1.5.5-cp311-cp311-musllinux_1_1_x86_64.whl; typed_ast-1.5.5-cp311-cp311-win_amd64.whl; typed_ast-1.5.5-cp36-cp36m-macosx_10_9_x86_64.whl; typed_ast-1.5.5-cp36-cp36m-manylinux_2_17_aarch64.manylinux2014_aarch64.whl; typed_ast-1.5.5-cp36-cp36m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; typed_ast-1.5.5-cp36-cp36m-musllinux_1_1_aarch64.whl; typed_ast-1.5.5-cp36-cp36m-musllinux_1_1_x86_64.whl; typed_ast-1.5.5-cp36-cp36m-win_amd64.whl
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See also ast-comments · types-typed-ast · astpretty · astatine · strip-hints · typeguard · jsoncomment · json-with-comments · gast · lxml-stubs