Pynvim implements support for python plugins in Nvim. It also works as a library for connecting to and scripting Nvim processes through its msgpack-rpc API.
Supports python 2.7, and 3.4 or later.
pip2 install pynvim pip3 install pynvim
If you only use one of python2 or python3, it is enough to install that
version. You can install the package without being root by adding the
Anytime you upgrade Neovim, make sure to upgrade pynvim as well:
pip2 install --upgrade pynvim pip3 install --upgrade pynvim
Alternatively, the master version could be installed by executing the following in the root of this repository:
pip2 install . pip3 install .
Python Plugin API
Pynvim supports python remote plugins (via the language-agnostic Nvim rplugin
interface), as well as Vim plugins (via the
:python interface). Thus when
pynvim is installed Neovim will report support for the
+python Vim feature.
The rplugin interface allows plugins to handle vimL function calls as well as defining commands and autocommands, and such plugins can operate asynchronously without blocking nvim. For details on the new rplugin interface, see the Remote Plugin documentation.
Pynvim defines some extensions over the vim python API:
- Builtin and plugin vimL functions are available as
- API functions are available as
vim.apiand for objects such as
- Lua functions can be defined using
vim.exec_luaand called with
- Support for thread-safety and async requests.
See the Python Plugin API documentation for usage of this new functionality.
Use (and activate) a local virtualenv.
python3 -m venv env36 source env36/bin/activate
If you change the code, you must reinstall for the changes to take effect:
pip install .
pytest to run the tests. Invoking with
python -m prepends the current
pytest might find other versions!):
python -m pytest
For details about testing and troubleshooting, see the development documentation.
Usage through the python REPL
A number of different transports are supported, but the simplest way to get
started is with the python REPL. First, start Nvim with a known address (or use
$NVIM_LISTEN_ADDRESS of a running instance):
$ NVIM_LISTEN_ADDRESS=/tmp/nvim nvim
In another terminal, connect a python REPL to Nvim (note that the API is similar to the one exposed by the python-vim bridge):
>>> from pynvim import attach # Create a python API session attached to unix domain socket created above: >>> nvim = attach('socket', path='/tmp/nvim') # Now do some work. >>> buffer = nvim.current.buffer # Get the current buffer >>> buffer = 'replace first line' >>> buffer[:] = ['replace whole buffer'] >>> nvim.command('vsplit') >>> nvim.windows.width = 10 >>> nvim.vars['global_var'] = [1, 2, 3] >>> nvim.eval('g:global_var') [1, 2, 3]
You can embed neovim into your python application instead of binding to a running neovim instance.
>>> from pynvim import attach >>> nvim = attach('child', argv=["/bin/env", "nvim", "--embed"])
The tests can be consulted for more examples.