{
  description = "Python DevShell — ОДИН Python!";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    devshell.url = "github:numtide/devshell";
    devshell.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs =
    {
      nixpkgs,
      devshell,
      flake-utils,
      ...
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = nixpkgs.legacyPackages.${system};

        # python
        python311 = pkgs.python311;

      in
      {
        devShells.default = devshell.legacyPackages.${system}.mkShell {
          packages = [
            python311
            python311.pkgs.black
            python311.pkgs.isort
            python311.pkgs.mypy
            python311.pkgs.ruff
            python311.pkgs.uv
          ];

          commands = [
              {
                name = "check";
                help = "Check python code";
                command = "ruff check";
                category = "python-tools";
              }
          ];

          devshell.startup.setup.text = ''
            echo "🚀 Python dev shell started!"
          '';

        };
      }
    );
}