nvim-jupyter-client

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nvim-jupyter-client

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Edit ipynb files (jupyter notebooks) directly in neovim, natively leveraging existing python setup.

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# nvim-jupyter-client
[![asciicast](https://asciinema.org/a/x9usnBgPpL8AcmgaG3vOk5qrG.svg)](https://asciinema.org/a/x9usnBgPpL8AcmgaG3vOk5qrG)

A Neovim plugin for editing Jupyter notebooks in Neovim, providing a seamless
integration between `.ipynb` files and Neovim's editing capabilities.
If you're familiar with Jupytext, this plugin offers similar functionality but
operates directly on the JSON structure of the notebook files. It just renders
the files to *look* like `python` files and it gives you all your usual setup
(e.g. treesitter, language server etc.).

## ⚠️ Important Notice
This plugin is still in the early stages of development. Please be aware that
there might be breaking changes in future updates. And not everything is
guaranteed to work as expected, so backup your files before testing!

## Features

- Open and edit Jupyter notebooks (`.ipynb` files) directly in Neovim
- Convert between code and markdown cells
- Add, remove, and merge cells
- Automatic cell boundary detection and highlighting
- Preserves notebook metadata and cell outputs
- Native Neovim feel while maintaining Jupyter notebook compatibility

## Installation
Using [lazy.nvim](https://github.com/folke/lazy.nvim):

```lua
{
    'geg2102/nvim-jupyter-client',
    config = function()
        require('nvim-jupyter-client').setup({})
    end
}
```

## Configuration

Basic setup with default configuration:

```lua
require('nvim-jupyter-client').setup({})
```

User configurable options:

```lua
require('nvim-jupyter-client').setup({
    template = {
        cells = {
            {
                cell_type = "code",
                execution_count = nil,
                metadata = {},
                outputs = {},
                source = {"# Custom template cell\n"}
            }
        },
        metadata = {
            kernelspec = {
                display_name = "Python 3",
                language = "python",
                name = "python3"
            }
        },
        nbformat = 4,
        nbformat_minor = 5
    }
    cell_highlight_group = "CurSearch", --whatever you want here
    -- If custom highlight group then set these manually
    highlights = {
        cell_title = {
            fg = "#ffffff",
            bg = "#000000",
        }
    }
})
```

## Commands

Example configuration with specific keybindings:

```lua
-- Add cells
vim.keymap.set("n", "<leader>ja", "<cmd>JupyterAddCellBelow<CR>", { desc = "Add Jupyter cell below" })
vim.keymap.set("n", "<leader>jA", "<cmd>JupyterAddCellAbove<CR>", { desc = "Add Jupyter cell above" })

-- Cell operations
vim.keymap.set("n", "<leader>jd", "<cmd>JupyterRemoveCell<CR>", { desc = "Remove current Jupyter cell" })
vim.keymap.set("n", "<leader>jm", "<cmd>JupyterMergeCellAbove<CR>", { desc = "Merge with cell above" })
vim.keymap.set("n", "<leader>jM", "<cmd>JupyterMergeCellBelow<CR>", { desc = "Merge with cell below" })
vim.keymap.set("n", "<leader>jt", "<cmd>JupyterConvertCellType<CR>", 
    { desc = "Convert cell type (code/markdown)" })
vim.keymap.set("v", "<leader>jm", "<cmd>JupyterMergeVisual<CR>", 
    { desc = "Merge selected cells" }),
vim.keymap.set("n", "<leader>jD", "<cmd>JupyterDeleteCell<CR>",
    { desc = "Delete cell under cursor and store in register" }),

```

- `:JupyterAddCellBelow` - Add a new cell below the current cell
- `:JupyterAddCellAbove` - Add a new cell above the current cell
- `:JupyterRemoveCell` - Remove the current cell
- `:JupyterMergeCellAbove` - Merge current cell with the cell above
- `:JupyterMergeCellBelow` - Merge current cell with the cell below
- `:JupyterConvertCellType` - Toggle between code and markdown cell types
- `:JupyterMergeVisual` - Merge selected cells
- `:JupyterDeleteCell` - Delete current cell and store in register

## Usage

1. Open a Jupyter notebook:

2. The plugin automatically converts the notebook into an editable format while preserving all notebook metadata.

3. Edit cells as normal Neovim text. Cell boundaries are automatically detected and highlighted.

4. Save changes using `:w` to maintain all changes in underlying `ipynb` file:

## Notes

- The plugin maintains notebook compatibility by preserving all metadata and cell information
- Cell execution count and outputs are preserved when saving
- Files are saved in standard `.ipynb` format

## Requirements

- Neovim >= 0.10.0

## Bonus

- The rendered `.ipynb` file will also work with [nvim-python-repl](https://github.com/geg2102/nvim-python-repl).

## Acknowledgements
- This pluging heavily leverages [dkjson](https://github.com/LuaDist/dkjson) Lua JSON library (packaged with plugin)

## Roadmap
- [ ] Direct kernel interaction using ZeroMQ (either rust or pure lua implementation)

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