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coc-mypy allows you to create an extension-only "venv" and install microsoft/vscode-mypy's langauge server.
When using coc-mypy for the first time, if microsoft/vscode-mypy's langauge server is not present in the runtime environment, you will be prompted to do a built-in install.
To use the built-in installation feature, execute the following command.
:CocCommand mypy-type-checker.installServer
Note
Use "dmypy" or "mypy"
The microsoft/vscode-mypy language server uses dmypy by default. If you want to use mypy, set mypy-type-checker.useDmypy to false.
coc-settings.json:
{
"mypy-type-checker.useDmypy": false
}
[Use dmypy] Vim/Neovim will exit a little slower
If you are using dmypy, the process of killing the dmypy process is included when Vim/Neovim exits. This may slow down the Vim/Neovim exit process slightly.
[Use mypy] Initial Diagnostic Display
The mypy command takes time to complete execution if the cache file for mypy does not exist. In other words, the first time it is executed, it takes time.
The same is true if you are using a language server, so it will take some time to display the initial diagnostics.
mypy-type-checker.useDmypy: Use dmypy deamon mode as the linting command run by microsoft/vscode-mypy's language server, default: true
mypy-type-checker.builtin.pythonPath: Python 3.x path (Absolute path) to be used for built-in install, default: ""
mypy-type-checker.showDocumantaion.enable: Whether to display the code action for open the Mypy rule documentation web page included in the diagnostic information, default: true
mypy-type-checker.trace.server: Traces the communication between coc.nvim and the language server, default: "off"