Tkinter - Frame

https://realpython.com/python-gui-tkinter/

INTRODUCTION

'Frame' widgets are used for organizing the layout of other widgets in an application. Frames are best thought of as 'containers' for other widgets.

import tkinter as tk   # Py3

root = tk.Tk()

frame_a = tk.Frame(root)
frame_b = tk.Frame(root)

label_a = tk.Label(frame_a, text="In Frame A")
label_a.grid()

label_b = tk.Label(frame_b, text="In Frame B")
label_b.grid()

# Ordering of frames is determined here.
frame_a.grid()
frame_b.grid()

root.mainloop()   # run the tkinter event loop
#       root
#      /     \
# frame_a   frame_b
#    |        |
# label_a   label_b

import tkinter as tk   # Py3

border_effects = {
    "flat": tk.FLAT,
    "sunken": tk.SUNKEN,
    "raised": tk.RAISED,
    "groove": tk.GROOVE,
    "ridge": tk.RIDGE,
}
root = tk.Tk()

c = 0
for relief_name, relief_obj in border_effects.items():
    frame = tk.Frame(root, relief=relief_obj, borderwidth=5)
    frame.grid(row=0, column=c)
    c += 1
    label = tk.Label(frame, text=relief_name)
    label.grid()

root.mainloop()   # run the tkinter event loop

Selected keyword arguments in Frame()

master=root   # the first argument
bg="black"   # set the background color to black ('bg' or 'background')
width=50   # in pixels
height=30   # in pixels
borderwidth=5   # a border around a frame widget (default is 0, no border)
relief="flat" # border decoration ("flat", "sunken", "raised", "groove", "ridge")
bd=5   # 'borderwidth' or 'bd'