+devshell structure

shells/python.nix

@@ -0,0 +1,78 @@
+# Modern Python development environment with marimo and uv — Nushell version
+# Usage: nix develop .#python   (drops into Nushell)
+{pkgs}: let
+  # Use the latest Python available in nixpkgs
+  python = pkgs.python314;
+in
+  pkgs.mkShell {
+    name = "python-marimo-dev";
+
+    buildInputs = with pkgs; [
+      # Python interpreter
+      python
+
+      # Modern package manager
+      uv
+
+      # Essential system dependencies for numpy and scientific packages
+      stdenv.cc.cc.lib
+      zlib
+      gfortran
+      openblas
+      lapack
+
+      # Nushell itself
+      nushell
+    ];
+
+    # Environment variables for proper library linking
+    LD_LIBRARY_PATH = "${pkgs.lib.makeLibraryPath [
+      pkgs.stdenv.cc.cc.lib
+      pkgs.zlib
+      pkgs.gfortran.cc.lib
+    ]}";
+
+    # Bash shellHook that sets up the environment and launches Nushell
+    shellHook = ''
+      echo "🐍 Python + Marimo Development Environment"
+      echo ""
+      echo "Python version: $(python --version)"
+      echo "uv version: $(uv --version)"
+      echo ""
+
+      # Create venv if it doesn't exist
+      if [ ! -d ".venv" ]; then
+        echo "Creating virtual environment..."
+        uv venv
+      fi
+
+      # Activate the virtual environment
+      source .venv/bin/activate
+
+      # Install marimo if not present
+      if ! python -c "import marimo" 2>/dev/null; then
+        echo "Installing marimo..."
+        uv pip install marimo
+      fi
+
+      # Install numpy if not present
+      if ! python -c "import numpy" 2>/dev/null; then
+        echo "Installing numpy..."
+        uv pip install numpy
+      fi
+
+      echo ""
+      echo "✅ Environment ready!"
+      echo ""
+      echo "Quick start:"
+      echo "  marimo edit               - Start marimo notebook"
+      echo "  uv pip install <package>  - Install packages"
+      echo "  python script.py          - Run Python scripts"
+      echo ""
+      echo "💡 Popular packages: uv pip install pandas matplotlib scipy scikit-learn"
+      echo ""
+
+      # Launch Nushell
+      exec nu
+    '';
+  }