Update python version to 3.12

jupyter/flake.nix

@@ -20,8 +20,8 @@
       devShells = forEachSupportedSystem ({ pkgs }: {
         default = pkgs.mkShell {
           packages = with pkgs;
-            [ python311 jupyter virtualenv ]
-            ++ (with pkgs.python311Packages; [ pip jupyter pandas numpy matplotlib ]);
+            [ python312 jupyter virtualenv ]
+            ++ (with pkgs.python312Packages; [ pip jupyter pandas numpy matplotlib ]);
         };
       });
     };

python/flake.nix

@@ -3,18 +3,25 @@
 
   inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";
 
-  outputs = { self, nixpkgs }:
+  outputs =
+    { self
+    , nixpkgs
+    ,
+    }:
     let
       supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
-      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
+      forEachSupportedSystem = f:
+        nixpkgs.lib.genAttrs supportedSystems (system:
+          f {
             pkgs = import nixpkgs { inherit system; };
           });
     in
     {
       devShells = forEachSupportedSystem ({ pkgs }: {
         default = pkgs.mkShell {
-          packages = with pkgs; [ python311 virtualenv ] ++
-            (with pkgs.python311Packages; [ pip ]);
+          packages = with pkgs;
+            [ python312 virtualenv ]
+            ++ (with pkgs.python312Packages; [ pip ]);
         };
       });
     };