add python flake

flake-python.nix

@@ -0,0 +1,29 @@
+  {
+  inputs = {
+    nixpkgs = {
+      url = "github:nixos/nixpkgs/nixos-unstable";
+    };
+    flake-utils = {
+      url = "github:numtide/flake-utils";
+    };
+  };
+  outputs = { nixpkgs, flake-utils, ... }: flake-utils.lib.eachDefaultSystem (system:
+    let
+      pkgs = import nixpkgs {
+        inherit system;
+      };
+    in rec {
+      devShell = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          (python3.withPackages(ps: with ps; [
+            ipython
+            jupyter
+            numpy
+            pandas
+          ]))
+        ];
+        shellHook = "jupyter notebook";
+      };
+    }
+  );
+}