How do I add a `ttk.Notebook` widget to a `tk.Frame`?

Question

I can create this GUI

┏━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━┓
┃ @ ┃ hello world                 ┃ X ┃
┣━━━┻━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┻━━━┫
┃                                     ┃
┃                                     ┃
┃                                     ┃
┃                                     ┃   <- Frame 0
┃                                     ┃
┃                                     ┃
┃                                     ┃
┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
┃                OTHER                ┃   <- Frame 1
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛

with the code shown below¹.

However, I want to add a ttk.Notebook to the Frame 0.

┏━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━┓
┃ @ ┃ hello world                 ┃ X ┃
┣━━━┻━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┻━━━┫
┃ ┏━━━━━━━┳━━━━━━━┳━━━━━━━━━┳━━━━━━━┓ ┃
┃ ┃ Tab 0 ┃ Tab 1 ┃ Tab ... ┃ Tab n ┃ ┃
┃ ┣━━━━━━━┻━━━━━━━┻━━━━━━━━━┻━━━━━━━┫ ┃
┃ ┃                                 ┃ ┃
┃ ┃                                 ┃ ┃   <- Frame 0 with n tabs (Notebooks)
┃ ┃                                 ┃ ┃
┃ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ ┃
┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
┃                OTHER                ┃   <- Frame 1
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛

Just adding the ttk.Notebook to the tk.Frame instance does not seem to work (i.e., tabControl = ttk.Notebook(self.frame0)). So, how do I add a ttk.Notebook widget to a tk.Frame?

---

¹ GUI code:

import tkinter as tk

class MyApp(tk.Tk):

    def __init__(self):
        super().__init__()
        self.title("hello world")

        self.frame0 = tk.Frame(self, background="green")
        self.frame1 = tk.Frame(self, background="blue")

        self.frame0.pack(side="top", fill="both", expand=True)
        self.frame1.pack(side="top", fill=tk.X, expand=True)

        self.frame0_label0 = tk.Label(self.frame0, text=" ")
        self.frame0_label0.grid(row=0, column=0)

        self.frame1_label0 = tk.Label(self.frame1, text="OTHER")
        self.frame1_label0.grid(row=0, column=0)


def main():
    MyApp().mainloop()


if __name__ == "__main__":
    main()

Answer 1

You add it exactly like you add any other widget. Create the widget, add it to the window with pack, grid, or place, and then add tabs to it using the add method.

For example:

tabControl = ttk.Notebook(self.frame0)
tabControl.grid(row=1, column=0, sticky="nsew")

tab1 = tk.Frame(tabControl)
tab2 = tk.Frame(tabControl)

tabControl.add(tab1, text="Tab 1")
tabControl.add(tab2, text="Tab 2")

For more information, see the official tkinter docs. Tkdocs.com also has an example