Uncaught TypeError: Unsupported type: function #53

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1. DjDeveloperr commented on Nov 6, 2023

   

   DjDeveloperr

   on Nov 6, 2023

   Member

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   Here's an example for passing JS functions to Python land:
   

   deno_python/test/test.ts

   Line 283 in 025e9da

   Deno.test("callback", () => {

   👍React with 👍1Reacted by Bedis Nbiba
2. sigmaSd commented on Nov 7, 2023

   

   sigmaSd

   on Nov 7, 2023

   ContributorAuthor

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   Nice this works indeed

   import { NamedArgument, python } from "https://deno.land/x/python@0.4.1/mod.ts";
   
   const gi = python.import("gi");
   gi.require_version("Gtk", "4.0");
   const Gtk = python.import("gi.repository.Gtk");
   
   const onActivate = python.callback(
     // deno-lint-ignore no-explicit-any
     (_kwargs: any, ...args: any[]): undefined => {
       const app = args[0];
       const win = Gtk.ApplicationWindow(new NamedArgument("application", app));
       win.present();
     },
   );
   const app = Gtk.Application();
   app.connect("activate", onActivate);
   
   app.run();
3. sigmaSd

   closed this as completedon Nov 7, 2023
4. sigmaSd commented on Nov 7, 2023

   

   sigmaSd

   on Nov 7, 2023

   ContributorAuthor

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   @DjDeveloperr I'm following this tutorial https://github.com/Taiko2k/GTK4PythonTutorial and this is what I reached so far

   import { NamedArgument, python } from "https://deno.land/x/python@0.4.1/mod.ts";
   
   const gi = python.import("gi");
   gi.require_version("Gtk", "4.0");
   gi.require_version("Adw", "1");
   const Gtk = python.import("gi.repository.Gtk");
   const Adw = python.import("gi.repository.Adw");
   
   class MainWindow extends Gtk.ApplicationWindow {
     constructor(kwargs) {
       super(kwargs);
   
    // question about this part
       const button = Gtk.Button(new NamedArgument("label", "Hello"));
       this.set_child(button);
     }
   }
   
   class MyApp extends Adw.Application {
     // deno-lint-ignore constructor-super
     constructor(...kwargs: any) {
       super().__init__(kwargs);
       this.connect("activate", this.onActivate);
     }
   
     onActivate = python.callback((kwargs, ...args) => {
       const app = args[0];
       const win = new MainWindow(new NamedArgument("application", app));
       win.present();
     });
   }
   const app = new MyApp(new NamedArgument("application_id", "com.example.com"));
   app.run(Deno.args);

   There are porbably other issues, but the immediate one I have is

     const button = Gtk.Button(new NamedArgument("label", "Hello"));
       this.set_child(button);

   if I change const button = to this.button = I get an error

   SystemError: <built-in method JSCallback:anonymous of NoneType object at 0x7fb24dedfc80> returned NULL without setting an exception