fisrt push

flake.nix

@@ -0,0 +1,74 @@
+{
+  description = "Reusable Python development environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        
+        # Python version configuration - easy to change in one place
+        pythonVersion = pkgs.python311;
+        
+        # Define Python packages in a separate variable for clarity
+        pythonPackages = ps: with ps; [
+          # Data science
+          numpy
+          pandas
+          matplotlib
+          scipy
+          
+          # Web and networking
+          requests
+          httpx
+          beautifulsoup4
+          
+          # Development tools
+          black
+          pylint
+          pytest
+          ipython
+          
+          # Add more packages as needed
+        ];
+        
+        # Create the Python environment with the specified packages
+        pythonEnv = pythonVersion.withPackages pythonPackages;
+      in
+      {
+        # Development shell for interactive use
+        devShells.default = pkgs.mkShell {
+          buildInputs = [
+            pythonEnv
+            pkgs.poetry
+            pkgs.git
+          ];
+          
+          shellHook = ''
+            echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+            echo "🐍 Python $(${pythonVersion}/bin/python --version)"
+            echo "📦 Poetry $(${pkgs.poetry}/bin/poetry --version)"
+            echo "📂 Working directory: $(pwd)"
+            echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+          '';
+        };
+        
+        # Make the Python environment available as a package
+        packages.default = pythonEnv;
+        
+        # Add an app that runs Python directly
+        apps.default = flake-utils.lib.mkApp {
+          drv = pythonEnv;
+          name = "python";
+          exePath = "/bin/python";
+        };
+        
+        # Add formatter for consistent Nix code formatting
+        formatter = pkgs.nixpkgs-fmt;
+      }
+    );
+}