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Changelog

3.15 (2026-07-03)

  • Deprecate the NamespacePackageEncountered exception.
  • Improve contribution experience for Windows developers using Just.
  • Tweak Just commands for running version-specific Python tests.
  • Remove typing-extensions as a dependency.
  • Make package FIPS compatible by marking blake2 hashing with usedforsecurity=False.
  • Raise ModuleNotPresent instead of an unclear error when find_modules_that_directly_import or find_modules_directly_imported_by is called with a module that is not in the graph. (#113)
  • Raise ValueError instead of pyo3_runtime.PanicException when a duplicate layer module is passed to find_illegal_dependencies_for_layers.

3.14 (2025-12-10)

  • Support building graph from namespace packages, not just their portions.
  • Bugfix: support Python 3.14 syntax such as t-strings as syntax errors. (#268)
  • Drop support for Python 3.9.

3.13 (2025-10-29)

  • Add nominate_cycle_breakers method.

3.12 (2025-10-09)

  • Officially support Python 3.14.
  • Improve contribution / CI tooling using Just and UV.

3.11 (2025-09-01)

  • Speed up graph building by switching from Python multiprocessing to Rust-based multithreading for import scanning.

(yanked) 3.10 (2025-08-15)

This release was yanked due to poor performance when building very large graphs.

  • Add closed layers to layer contract.
  • Rename default repository branch to 'main'.
  • Optimise find_shortest_chains query.

3.9 (2025-05-05)

  • Use Rust instead of Python's built-in ast module for import parsing.

3.8.2 (2025-04-24)

  • Provide more control of multiprocessing via GRIMP_MIN_MULTIPROCESSING_MODULES environment variable.

3.8.1 (2025-04-23)

  • Use joblib instead of multiprocessing for CPU parallelism. Fixes #208.

3.8 (2025-04-11)

  • Accelerate import scanning via CPU parallelism (multiprocessing).

3.7.1 (2025-03-12)

  • Fixed handling of within-descendant-imports when squashing modules (see Issue 195).

3.7 (2025-03-07)

  • Added find_matching_modules and find_matching_direct_imports methods.
  • Added as_packages option to the find_shortest_chain method.

3.6 (2025-02-07)

  • Reimplement the graph in Rust. This is a substantial rewrite that, mostly, significantly improves performance, but there may be certain operations that are slower than before.

3.5 (2024-10-08)

  • Added as_packages option to the find_shortest_chains method.
  • Include 3.13 wheel in release.
  • Drop support for Python 3.8.

3.4.1 (2024-07-12)

  • Officially support Python 3.13.

3.4 (2024-07-09)

  • Speed up adding and removing modules.

3.3 (2024-06-13)

  • Upgrade PyO3 to 0.21.
  • Follow symbolic links while walking through module files.
  • Speed up find_illegal_dependencies_for_layers by using thread concurrency.

3.2 (2024-1-8)

  • Allow configuring sibling layer independence.
  • Fix bug where a warning would be logged if a non-Python file with multiple dots in the filename was encountered.
  • Formally add support for Python 3.12.

3.1 (2023-10-13)

  • Add exclude_type_checking_imports argument to build_graph.

3.0 (2023-8-18)

  • Stable release of functionality from 3.0b1-3.

3.0b3 (2023-8-17)

  • Support for independent layers in find_illegal_dependencies_for_layers.

3.0b1, 3.0b2 (2023-8-15)

  • Switch to pyproject.toml.
  • Rename upstream/downstream in find_illegal_dependencies_for_layers to importer/imported. The original names were accidentally used in reverse; the new names have less potential for confusion.
  • Use Rust extension module for find_illegal_dependencies_for_layers.

2.5 (2023-7-6)

  • Log cache activity.
  • Drop support for Python 3.7.
  • Add find_illegal_dependencies_for_layers method.

2.4 (2023-5-5)

  • Change cache filename scheme to use a hash.
  • Ignore modules with dots in the filename.

2.3 (2023-3-3)

  • Add caching.

2.2 (2023-1-5)

  • Annotate get_import_details return value with a DetailedImport.

2.1 (2022-12-2)

  • Officially support Python 3.11.

2.0 (2022-9-27)

  • Significantly speed up graph copying.
  • Remove find_all_simple_chains method.
  • No longer use a networkx graph internally.
  • Fix bug where import details remained stored in the graph after removing modules or imports.

1.3 (2022-8-15)

  • Officially support Python 3.9 and 3.10.
  • Drop support for Python 3.6.
  • Support namespaced packages.

1.2.3 (2021-1-19)

  • Raise custom exception (NamespacePackageEncountered) if code under analysis appears to be a namespace package.

1.2.2 (2020-6-29)

  • Raise custom exception (SourceSyntaxError) if code under analysis contains syntax error.

1.2.1 (2020-3-16)

  • Better handling of source code containing non-ascii compatible characters

1.2 (2019-11-27)

  • Significantly increase the speed of building the graph.

1.1 (2019-11-18)

  • Clarify behaviour of get_import_details.
  • Add module_is_squashed method.
  • Add squash_module method.
  • Add find_all_simple_chains method.

1.0 (2019-10-17)

  • Officially support Python 3.8.

1.0b13 (2019-9-25)

  • Support multiple root packages.

1.0b12 (2019-6-12)

  • Add find_shortest_chains method.

1.0b11 (2019-5-18)

  • Add remove_module method.

1.0b10 (2019-5-15)

  • Fix Windows incompatibility.

1.0b9 (2019-4-16)

  • Fix bug with calling importlib.util.find_spec.

1.0b8 (2019-2-1)

  • Add as_packages parameter to direct_import_exists.

1.0b7 (2019-1-21)

  • Add count_imports method.

1.0b6 (2019-1-20)

  • Support building the graph with external packages.

1.0b5 (2019-1-12)

  • Rename get_shortest_path to get_shortest_chain.
  • Rename path_exists to chain_exists.
  • Rename and reorder the kwargs for get_shortest_chain and chain_exists.
  • Raise ValueError if modules with shared descendants are passed to chain_exists if as_packages=True.

1.0b4 (2019-1-7)

  • Improve repr of ImportGraph.
  • Fix bug with find_shortest_path using upstream/downstream the wrong way around.

1.0b3 (2018-12-16)

  • Fix bug with analysing relative imports from within __init__.py files.
  • Stop skipping analysing packages called migrations.
  • Deal with invalid imports by warning instead of raising an exception.
  • Rename NetworkXBackedImportGraph to ImportGraph.

1.0b2 (2018-12-12)

  • Fix PyPI readme rendering.

1.0b1 (2018-12-08)

  • Implement core functionality.

0.0.1 (2018-11-05)

  • Release blank project on PyPI.