Jedi - an awesome autocompletion, static analysis and refactoring library for Python

Jedi is a static analysis tool for Python that is typically used in IDEs/editors plugins. Jedi has a focus on autocompletion and goto functionality. Other features include refactoring, code search and finding references.

Jedi has a simple API to work with. There is a reference implementation as a VIM-Plugin. Autocompletion in your REPL is also possible, IPython uses it natively and for the CPython REPL you can install it. Jedi is well tested and bugs should be rare.

Jedi can currently be used with the following editors/projects:

• Vim (jedi-vim, YouCompleteMe, deoplete-jedi, completor.vim)
• Visual Studio Code (via Python Extension)
• Emacs (Jedi.el, company-mode, elpy, anaconda-mode, ycmd)
• Sublime Text (SublimeJEDI [ST2 + ST3], anaconda [only ST3])
• TextMate (Not sure if it's actually working)
• Kate version 4.13+ supports it natively, you have to enable it, though. [see]
• Atom (autocomplete-python-jedi)
• GNOME Builder (with support for GObject Introspection)
• Gedit (gedi)
• wdb - Web Debugger
• Eric IDE
• IPython 6.0.0+
• xonsh shell has jedi extension

and many more!

There are a few language servers that use Jedi:

• jedi-language-server
• python-language-server (currently unmaintained)
• python-lsp-server (fork from python-language-server)
• anakin-language-server

Here are some pictures taken from jedi-vim:

Completion for almost anything:

Documentation:

Get the latest version from github (master branch should always be kind of stable/working).

Docs are available at . Pull requests with enhancements and/or fixes are awesome and most welcome. Jedi uses semantic versioning.

If you want to stay up-to-date with releases, please subscribe to this mailing list: . To subscribe you can simply send an empty email to jedi-announce+subscribe@googlegroups.com.

Issues & Questions

You can file issues and questions in the issue tracker <https://github.com/davidhalter/jedi/&gt;. Alternatively you can also ask on Stack Overflow with the label python-jedi.

Installation

Check out the docs.

Features and Limitations

Jedi's features are listed here: Features.

You can run Jedi on Python 3.6+ but it should also understand code that is older than those versions. Additionally you should be able to use Virtualenvs very well.

Tips on how to use Jedi efficiently can be found here.

API

You can find a comprehensive documentation for the API here.

Autocompletion / Goto / Documentation

There are the following commands:

• jedi.Script.goto
• jedi.Script.infer
• jedi.Script.help
• jedi.Script.complete
• jedi.Script.get_references
• jedi.Script.get_signatures
• jedi.Script.get_context

The returned objects are very powerful and are really all you might need.

Autocompletion in your REPL (IPython, etc.)

Jedi is a dependency of IPython. Autocompletion in IPython with Jedi is therefore possible without additional configuration.

Here is an example video how REPL completion can look like. For the python shell you can enable tab completion in a REPL.

Static Analysis

For a lot of forms of static analysis, you can try to use jedi.Script(...).get_names. It will return a list of names that you can then filter and work with. There is also a way to list the syntax errors in a file: jedi.Script.get_syntax_errors.

Refactoring

Jedi supports the following refactorings:

• jedi.Script.inline
• jedi.Script.rename
• jedi.Script.extract_function
• jedi.Script.extract_variable

Code Search

There is support for module search with jedi.Script.search, and project search for jedi.Project.search. The way to search is either by providing a name like foo or by using dotted syntax like foo.bar. Additionally you can provide the API type like class foo.bar.Bar. There are also the functions jedi.Script.complete_search and jedi.Project.complete_search.

Development

There's a pretty good and extensive development documentation.

Testing

The test suite uses pytest:

pip install pytest

If you want to test only a specific Python version (e.g. Python 3.8), it is as easy as:

python3.8 -m pytest

For more detailed information visit the testing documentation.

Acknowledgements

Thanks a lot to all the contributors!

Changelog

Unreleased

0.19.1 (2023-10-02)

• Python 3.12 support (Thanks Peter!)

0.19.0 (2023-07-29)

• Python 3.11 support
• Massive improvements in performance for Interpreter (e.g. IPython) users. This especially affects pandas users with large datasets.
• Add jedi.settings.allow_unsafe_interpreter_executions to make it easier for IPython users to avoid unsafe executions.

0.18.2 (2022-11-21)

• Added dataclass-equivalent for attrs.define
• Find fixtures from Pytest entrypoints; Examples of pytest plugins installed like this are pytest-django, pytest-sugar and Faker.
• Fixed Project.search, when a venv was involved, which is why for example :Pyimport django.db did not work in some cases in jedi-vim.
• And many smaller bugfixes

0.18.1 (2021-11-17)

• Implict namespaces are now a separate types in Name().type
• Python 3.10 support
• Mostly bugfixes

0.18.0 (2020-12-25)

• Dropped Python 2 and Python 3.5
• Using pathlib.Path() as an output instead of str in most places:
  • Project.path
  • Script.path
  • Definition.module_path
  • Refactoring.get_renames
  • Refactoring.get_changed_files
• Functions with @property now return property instead of function in Name().type
• Started using annotations
• Better support for the walrus operator
• Project attributes are now read accessible
• Removed all deprecations

This is likely going to be the last minor release before 1.0.

0.17.2 (2020-07-17)

• Added an option to pass environment variables to Environment
• Project(...).path exists now
• Support for Python 3.9
• A few bugfixes

This will be the last release that supports Python 2 and Python 3.5. 0.18.0 will be Python 3.6+.

0.17.1 (2020-06-20)

• Django Model meta class support
• Django Manager support (completion on Managers/QuerySets)
• Added Django Stubs to Jedi, thanks to all contributors of the Django Stubs project
• Added SyntaxError.get_message
• Python 3.9 support
• Bugfixes (mostly towards Generics)

0.17.0 (2020-04-14)

• Added Project support. This allows a user to specify which folders Jedi should work with.
• Added support for Refactoring. The following refactorings have been implemented: Script.rename, Script.inline, Script.extract_variable and Script.extract_function.
• Added Script.get_syntax_errors to display syntax errors in the current script.
• Added code search capabilities both for individual files and projects. The new functions are Project.search, Project.complete_search, Script.search and Script.complete_search.
• Added Script.help to make it easier to display a help window to people. Now returns pydoc information as well for Python keywords/operators. This means that on the class keyword it will now return the docstring of Python's builtin function help('class').
• The API documentation is now way more readable and complete. Check it out under . A lot of it has been rewritten.
• Removed Python 3.4 support
• Many bugfixes

This is likely going to be the last minor version that supports Python 2 and Python3.5. Bugfixes will be provided in 0.17.1+. The next minor/major version will probably be Jedi 1.0.0.

0.16.0 (2020-01-26)

• Added Script.get_context to get information where you currently are.

• Completions/type inference of Pytest fixtures.

• Tensorflow, Numpy and Pandas completions should now be about 4-10x faster after the first time they are used.

• Dict key completions are working now. e.g. d = {1000: 3}; d[10 will expand to 1000.

• Completion for "proxies" works now. These are classes that have a __getattr__(self, name) method that does a return getattr(x, name). after loading them initially.

• Goto on a function/attribute in a class now goes to the definition in its super class.

• Big Script API Changes:

  • The line and column parameters of jedi.Script are now deprecated
  • completions deprecated, use complete instead
  • goto_assignments deprecated, use goto instead
  • goto_definitions deprecated, use infer instead
  • call_signatures deprecated, use get_signatures instead
  • usages deprecated, use get_references instead
  • jedi.names deprecated, use jedi.Script(...).get_names()

• BaseName.goto_assignments renamed to BaseName.goto

• Add follow_imports to Name.goto. Now its signature matches Script.goto.

• Python 2 support deprecated. For this release it is best effort. Python 2 has reached the end of its life and now it's just about a smooth transition. Bugs for Python 2 will not be fixed anymore and a third of the tests are already skipped.

• Removed settings.no_completion_duplicates. It wasn't tested and nobody was probably using it anyway.

• Removed settings.use_filesystem_cache and settings.additional_dynamic_modules, they have no usage anymore. Pretty much nobody was probably using them.

0.15.2 (2019-12-20)

• Signatures are now detected a lot better
• Add fuzzy completions with Script(...).completions(fuzzy=True)
• Files bigger than one MB (about 20kLOC) get cropped to avoid getting stuck completely.
• Many small Bugfixes
• A big refactoring around contexts/values

0.15.1 (2019-08-13)

• Small bugfix and removal of a print statement

0.15.0 (2019-08-11)

• Added file path completions, there's a new Completion.type now: path. Example: '/ho -> '/home/
• *args/**kwargs resolving. If possible Jedi replaces the parameters with the actual alternatives.
• Better support for enums/dataclasses
• When using Interpreter, properties are now executed, since a lot of people have complained about this. Discussion in #1299, #1347.

New APIs:

• Name.get_signatures() -> List[Signature]. Signatures are similar to CallSignature. Name.params is therefore deprecated.
• Signature.to_string() to format signatures.
• Signature.params -> List[ParamName], ParamName has the following additional attributes infer_default(), infer_annotation(), to_string(), and kind.
• Name.execute() -> List[Name], makes it possible to infer return values of functions.

0.14.1 (2019-07-13)

• CallSignature.index should now be working a lot better
• A couple of smaller bugfixes

0.14.0 (2019-06-20)

• Added goto_*(prefer_stubs=True) as well as goto_*(prefer_stubs=True)
• Stubs are used now for type inference
• Typeshed is used for better type inference
• Reworked Name.full_name, should have more correct return values

0.13.3 (2019-02-24)

• Fixed an issue with embedded Python, see

0.13.2 (2018-12-15)

• Fixed a bug that led to Jedi spawning a lot of subprocesses.

0.13.1 (2018-10-02)

• Bugfixes, because tensorflow completions were still slow.

0.13.0 (2018-10-02)

• A small release. Some bug fixes.
• Remove Python 3.3 support. Python 3.3 support has been dropped by the Python foundation.
• Default environments are now using the same Python version as the Python process. In 0.12.x, we used to load the latest Python version on the system.
• Added include_builtins as a parameter to usages.
• goto_assignments has a new follow_builtin_imports parameter that changes the previous behavior slightly.

0.12.1 (2018-06-30)

• This release forces you to upgrade parso. If you don't, nothing will work anymore. Otherwise changes should be limited to bug fixes. Unfortunately Jedi still uses a few internals of parso that make it hard to keep compatibility over multiple releases. Parso >=0.3.0 is going to be needed.

0.12.0 (2018-04-15)

• Virtualenv/Environment support
• F-String Completion/Goto Support
• Cannot crash with segfaults anymore
• Cleaned up import logic
• Understand async/await and autocomplete it (including async generators)
• Better namespace completions
• Passing tests for Windows (including CI for Windows)
• Remove Python 2.6 support

0.11.1 (2017-12-14)

• Parso update - the caching layer was broken
• Better usages - a lot of internal code was ripped out and improved.

0.11.0 (2017-09-20)

• Split Jedi's parser into a separate project called parso.
• Avoiding side effects in REPL completion.
• Numpy docstring support should be much better.
• Moved the settings.*recursion* away, they are no longer usable.

0.10.2 (2017-04-05)

• Python Packaging sucks. Some files were not included in 0.10.1.

0.10.1 (2017-04-05)

• Fixed a few very annoying bugs.
• Prepared the parser to be factored out of Jedi.

0.10.0 (2017-02-03)

• Actual semantic completions for the complete Python syntax.
• Basic type inference for yield from PEP 380.
• PEP 484 support (most of the important features of it). Thanks Claude! (@reinhrst)
• Added get_line_code to Name and Completion objects.
• Completely rewritten the type inference engine.
• A new and better parser for (fast) parsing diffs of Python code.

0.9.0 (2015-04-10)

• The import logic has been rewritten to look more like Python's. There is now an InferState.modules import cache, which resembles sys.modules.
• Integrated the parser of 2to3. This will make refactoring possible. It will also be possible to check for error messages (like compiling an AST would give) in the future.
• With the new parser, the type inference also completely changed. It's now simpler and more readable.
• Completely rewritten REPL completion.
• Added jedi.names, a command to do static analysis. Thanks to that sourcegraph guys for sponsoring this!
• Alpha version of the linter.

0.8.1 (2014-07-23)

• Bugfix release, the last release forgot to include files that improve autocompletion for builtin libraries. Fixed.

0.8.0 (2014-05-05)

• Memory Consumption for compiled modules (e.g. builtins, sys) has been reduced drastically. Loading times are down as well (it takes basically as long as an import).
• REPL completion is starting to become usable.
• Various small API changes. Generally this release focuses on stability and refactoring of internal APIs.
• Introducing operator precedence, which makes calculating correct Array indices and __getattr__ strings possible.

0.7.0 (2013-08-09)

• Switched from LGPL to MIT license.
• Added an Interpreter class to the API to make autocompletion in REPL possible.
• Added autocompletion support for namespace packages.
• Add sith.py, a new random testing method.

0.6.0 (2013-05-14)

• Much faster parser with builtin part caching.
• A test suite, thanks @tkf.

0.5 versions (2012)

• Initial development.