Jedi - an awesome autocompletion/static analysis library for Python
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Jedi is a static analysis tool for Python that can be used in IDEs/editors. Its historic focus is autocompletion, but does static analysis for now as well. Jedi is fast and is very well tested. It understands Python on a deeper level than all other static analysis frameworks for Python.
Jedi has support for two different goto functions. It's possible to search for related names and to list all names in a Python file and infer them. Jedi understands docstrings and you can use Jedi autocompletion in your REPL as well.
Jedi uses a very simple API to connect with IDE's. There's a reference implementation as a VIM-Plugin, which uses Jedi's autocompletion. We encourage you to use Jedi in your IDEs. It's really easy.
Jedi can currently be used with the following editors:
- Vim (jedi-vim, YouCompleteMe)
- Emacs (Jedi.el, 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. [proof]
And it powers the following projects:
- wdb - Web Debugger
Here are some pictures taken from jedi-vim:
Completion for almost anything (Ctrl+Space).
Display of function/class bodies, docstrings.
Pydoc support (Shift+k).
There is also support for goto and renaming.
Get the latest version from github (master branch should always be kind of stable/working).
pip install jedi
Note: This just installs the Jedi library, not the editor plugins. For information about how to make it work with your editor, refer to the corresponding documentation.
You don't want to use
pip? Please refer to the manual.
Feature Support and Caveats
Jedi really understands your Python code. For a comprehensive list what Jedi understands, see: Features. A list of caveats can be found on the same page.
You can run Jedi on cPython 2.6, 2.7, 3.2, 3.3 or 3.4, but it should also understand/parse code older than those versions.
Tips on how to use Jedi efficiently can be found here.
You can find the documentation for the API here.
Autocompletion / Goto / Pydoc
Please check the API for a good explanation. There are the following commands:
The returned objects are very powerful and really all you might need.
Autocompletion in your REPL (IPython, etc.)
Static Analysis / Linter
To do all forms of static analysis, please try to use
jedi.names. It will
return a list of names that you can use to infer types and so on.
Linting is another thing that is going to be part of Jedi. For now you can try
an alpha version
python -m jedi linter. The API might change though and
it's still buggy. It's Jedi's goal to be smarter than classic linter and
AttributeError and other code issues.
Jedi would in theory support refactoring, but we have never publicized it, because it's not production ready. If you're interested in helping out here, let me know. With the latest parser changes, it should be very easy to actually make it work.
There's a pretty good and extensive development documentation.
The test suite depends on
pip install tox pytest
To run the tests for all supported Python versions:
If you want to test only a specific Python version (e.g. Python 2.7), it's as easy as
tox -e py27
Tests are also run automatically on Travis CI.
For more detailed information visit the testing documentation