findimports 3.0.0

Python module import analysis tool

FindImports

FindImports extracts Python module dependencies by parsing source files. It can report names that are imported but not used, and it can generate module import graphs in ASCII or graphviz or JSON formats.

A distinguishing feature of findimports used to be that it could parse doctest code inside docstrings.

Note that not all cases are handled correctly, especially if you use ‘import foo.bar.baz’, or rely on PEP 420 implicit namespace packages.

If you need to find unused imports in your codebase, I recommend flake8 instead – it’s better maintained and more reliable. For import graphs consider pydeps.

Installation

Use your favorite Python command-line tool installer such as pipx or uv. Or run it without installing with

uvx findimports --help

Module dependency graphs

On larger projects the module graphs tend to be an unreadable mess. You can make them clearer by post-processing the graph with tred to remove graph edges representing direct dependencies to modules that you’re already transitively depending on:

uvx findimports -N -q src -d | tred | xdot -

tred is part of graphviz. xdot is a nice interactive graphviz viewer.

Misc

Home page: https://github.com/mgedmin/findimports

Licence: MIT (https://mit-license.org/)

Changes

3.0.0 (2025-12-08)

• -t/--tred to compute a transitive reduction of the import graph. Somewhat experimental.

• Bugfix: names getting imported from a package’s foo/__init__.py` were not being correctly tracked; they instead were treated as imports from an external package ‘foo’, while ‘foo.__init__’ was shown to be with no incoming edges.

Backwards incompatible changes: modules named __init__ are now treated as packages, so instead of foo.__init__ in the output you’ll see just foo.

2.8.0 (2025-12-06)

• -l/--levels now works even without using -p. This lets you collapse subpackages while still seeing modules inside the top-level package.

2.7.0 (2025-11-14)

• Add support for Python 3.14.

• Drop support for Python 3.8 and 3.9.

• Add --quiet/-q to suppress “could not find some.module” warnings.

• Add --json/-j to produce JSON output.

• Support glob patterns in --ignore/-I. Make the default ignore pattern .*.

Backwards incompatible changes: venv is no longer ignored by default. The Python community has settled on .venv as the default directory name for a project-local virtual environment, which is now ignored by the new default ignore pattern.

2.6.0 (2025-06-02)

• Drop support for Python 3.7.

• Add --csv/-C output format: pull request 32.

• Add --search-import/-s command-line option to filter imports by substring: pull request 33.

2.5.2 (2024-11-27)

• Bugfix: findimports was treating all imports as relative, just like in the good old Python 2 days. Oops.

• When reporting that it couldn’t find the source for an imported module, findimports will now mention the line number that contained the import statement.

2.5.1 (2024-10-09)

• Add support for Python 3.13.

2.5.0 (2024-05-30)

• Fixed extension module detection that never worked on Python 3. See pull request 29.

• Add --attr/-A to add arbitrary graphviz graph attributes to the output. See pull request 30.

2.4.0 (2024-02-01)

• Add support for Python 3.12.

• Change license from GPL to MIT. See issue 27.

• Add --package-externals/-pE to simplify the module graph.

• Add --rmprefix PREFIX/-R PREFIX to remove a package prefix from displayed names.

• Add --depth N/-D N to ignore import statements nested too deep in the syntax tree (e.g. in functions or if statements).

2.3.0 (2022-10-27)

• Rewrote command-line parsing to use argparse. Options that select an action (--imports/--dot/--names/--unused) now conflict instead of all but the last one being ignored. See pull request #20.

• Add support for Python 3.11.

• Drop support for Python 3.6.

2.2.0 (2021-12-16)

• Add support for Python 3.10.

• Add --ignore-stdlib flag to ignore modules from the Python standard library.

2.1.0 (2021-05-16)

• Add --ignore flag to ignore files and directories, it can be used multiple times. See pull request #14.

2.0.0 (2021-05-09)

• Add support for Python 3.9.

• Drop support for Python 3.5 and 2.7.

• Fix a bug where the encoding of Python files was not determined in the same way as by Python itself. See issue 15. This requires the use of tokenize.open which is not in Python 2.7.

1.5.2 (2019-10-31)

• Add support for Python 3.8.

• Fix a bug where a package/module with a name that is a prefix of another package/module might accidentally be used instead of the other one (e.g. py instead of pylab). See issue 10.

1.5.1 (2019-04-23)

• Drop support for Python 3.4.

1.5.0 (2019-03-18)

• Support Python 3.6 and 3.7.

• Drop support for Python 2.6 and 3.3.

• Suppress duplicate import warnings if the line in question has a comment.

1.4.1 (2016-09-28)

• Replace getopt with optparse. This changes the --help message as a side effect (#4).

1.4.0 (2015-06-04)

• Python 3 support (3.3 and newer).

• Use ast instead of compiler (#1).

1.3.2 (2015-04-13)

• Fix “cannot find datetime” on Ubuntu 14.04 LTS (#3).

• 100% test coverage.

1.3.1 (2014-04-16)

• Added support for relative imports (e.g. from .. import foo).

1.3.0 (2013-04-10)

• Moved to Github.

• Drop Python 2.4 and 2.5 support.

• Handle unicode docstrings with doctests.

1.2.14 (2012-02-12)

• Recognize builtin modules using sys.builtin_module_names. Fixes https://bugs.launchpad.net/findimports/+bug/880989.

1.2.13 (2011-04-18)

• Suppress “not a zipfile” warnings about *.egg-info files listed in sys.path.

1.2.12 (2011-04-08)

• Handle zipfile errors when there are plain files that are not zip files on sys.path.

1.2.11 (2011-03-30)

• Fix ‘could not find cPickle’ errors on Python 2.6 and newer.

1.2.10 (2010-02-05)

• Ignore ‘from __future__ import …’.

1.2.9 (2009-07-07)

• Fixed broken and uninstallable source distribution by adding a MANIFEST.in.

1.2.8 (2009-07-07)

• Is able to find modules inside zip files (e.g. eggs).

• Fixed deprecation warning on Python 2.6.