MypyReveal

A Sublime Text plugin that uses mypy to reveal the type of the variable under your cursor, or to reveal the types of all local variables, using reveal_type or reveal_locals. Read more here.

Requirements

Make sure you install mypy 0.711 or later first, and that it's in your $PATH.

Installation

Search for MypyReveal in Package Control.

Usage

Search for MypyReveal in the command palette, and run either MypyReveal: Type or MypyReveal: Locals.

Key Bindings

If you wanted to bind ctrl+t to reveal type and alt+t to reveal locals, you would insert the following into your .sublime-keymap:

{
  "keys": ["ctrl+t"],
  "command": "mypy_reveal",
  "context": [{ "key": "selector", "operator": "equal", "operand": "source.python" }]
},
{
  "keys": ["alt+t"],
  "command": "mypy_reveal",
  "args": {
    "locals": true
  },
  "context": [{ "key": "selector", "operator": "equal", "operand": "source.python" }]
},

Custom Executable

Like Sublime Linter, this plugin assumes mypy is in the $PATH available to Sublime Text. If it's not, you'll have to set your own executable path in settings.

If you want per-project executable paths, e.g. because you want mypy to have access to the packages you have installed in a virtual env, add the following to your project settings:

{
  "folders": [
    {
      "path": "..."
    }
  ],
  "settings": {
    "MypyReveal.executable": "/path/to/mypy"
  }
}

This plugin is designed to work in conjunction with the mypy Sublime Linter plugin.