lampy.nvim

Neovim remote plugin (Python3) wrapping latex2sympy2 for symbolic LaTeX calculation. Select LaTeX expressions and evaluate or run sympy code — all inline.

lampy.demo.mp4

Inspired by OrangeX4/Latex-Sympy-Calculator.

Installation (lazy.nvim)

{
  "SPLYASHKA/lampy.nvim",
  build = ":UpdateRemotePlugins",
  keys = {
    -- example keymaps, change to your preference
    { "<leader>le", ":LampyEval<CR>",        mode = "x",                 ft = { "markdown", "tex" },    desc = "Lampy eval visual selection" },
    { "<leader>lE", ":LampyEvalReplace<CR>", mode = "x",                 ft = { "markdown", "tex" },    desc = "Lampy eval replace" },
    { "<leader>lf", ":LampyFactor<CR>",      mode = "x",                 ft = { "markdown", "tex" },    desc = "Lampy factor" },
    { "<leader>lx", ":LampyExpand<CR>",      mode = "x",                 ft = { "markdown", "tex" },    desc = "Lampy expand" },
    { "<leader>ld", ":LampyDefineVar<CR>",   mode = "x",                 ft = { "markdown", "tex" },    desc = "Lampy define variable" },
    { "<leader>ln", ":LampyNumerical<CR>",   mode = "x",                 ft = { "markdown", "tex" },    desc = "Lampy numerical" },
    { "<leader>lp", ":LampyPython<CR>",      mode = "x",                 ft = { "markdown", "tex" },    desc = "Lampy python" },
    -- same keys in normal mode for Line variants
    { "<leader>le", ":LampyEvalLine<CR>",        ft = { "markdown", "tex" }, desc = "Lampy eval line" },
    { "<leader>lE", ":LampyEvalReplaceLine<CR>", ft = { "markdown", "tex" }, desc = "Lampy eval replace line" },
    { "<leader>lf", ":LampyFactorLine<CR>",      ft = { "markdown", "tex" }, desc = "Lampy factor line" },
    { "<leader>lx", ":LampyExpandLine<CR>",      ft = { "markdown", "tex" }, desc = "Lampy expand line" },
    { "<leader>ld", ":LampyDefineVarLine<CR>",   ft = { "markdown", "tex" }, desc = "Lampy define variable line" },
    { "<leader>ln", ":LampyNumericalLine<CR>",   ft = { "markdown", "tex" }, desc = "Lampy numerical line" },
    { "<leader>lp", ":LampyPythonLine<CR>",      ft = { "markdown", "tex" }, desc = "Lampy python line" },
    -- variable commands
    { "<leader>ls", ":LampyShowVars<CR>",    ft = { "markdown", "tex" }, desc = "Lampy show variables" },
    { "<leader>lR", ":LampyResetVars<CR>",   ft = { "markdown", "tex" }, desc = "Lampy reset variables" },
  },
}

Commands

Command	Action
LampyEval	selection ⟶ selection = result
LampyEvalReplace	selection ⟶ result
LampyFactor	factor selection
LampyExpand	expand selection
LampyDefineVar	define x = 5 for subsequent evals
LampyNumerical	numerical evaluation
LampyPython	evaluate Python/sympy code

All visual commands also have a Line variant (e.g. LampyEvalLine) that operates on the current line.

Command	Action
LampyShowVars	show stored variables
LampyResetVars	clear stored variables

Requirements

pip install latex2sympy2 pynvim

After installing, run :UpdateRemotePlugins and restart Neovim. Run :checkhealth lampy to verify.

License

MIT