develop#python: init profile

profiles/develop/kakoune/default.nix

@@ -1,4 +1,6 @@
 { pkgs, ... }: {
+  imports = [ ../python ];
+
   environment.systemPackages = with pkgs; [
     cquery
     kak-lsp
@@ -6,7 +8,6 @@
     kakoune-unwrapped
     nixfmt
     python3Packages.python-language-server
-    python3
     rustup
   ];
 

profiles/develop/python/default.nix

@@ -0,0 +1,33 @@
+{ pkgs, ... }:
+let inherit (pkgs) python3Packages;
+in {
+  environment.systemPackages = let
+    packages = pythonPackages:
+      with pythonPackages; [
+        numpy
+        pandas
+        ptpython
+        requests
+        scipy
+      ];
+
+    python = pkgs.python3.withPackages packages;
+
+  in [ python ];
+  environment.sessionVariables = {
+    PYTHONSTARTUP = let
+      startup = pkgs.writers.writePython3 "ptpython.py" {
+        libraries = [ python3Packages.ptpython ];
+      } ''
+        import sys
+        try:
+            from ptpython.repl import embed
+        except ImportError:
+            print("ptpython is not available: falling back to standard prompt")
+        else:
+            sys.exit(embed(globals(), locals()))
+      '';
+    in "${startup}";
+  };
+}
+