I have a tkinter window of dimensions 300x300 pixel and a button and a label that are supposed to appear but they are not. I am only starting with tkinter so not too sure what I am doing wrong from

CodePudding user response：

You forgot frame.pack()

...

if __name__ == "__main__":
    app = App("300x300")
    frame = Window(app)
    frame.pack()  # <- HERE
    app.mainloop()