To put a border around a Frame in Tkinter, we have to use the highlightbackground and highlightthickeness parameters while creating the Frame. Let's take an example and see how to use these two parameters.
Steps −
Import the tkinter library and create an instance of tkinter frame.
Set the size of the frame using geometry method.
Create a frame with Frame() method. Highlight the border of the frame with a color, highlightbackground="blue". Then, set the thickness of the border, highlightthickness=2.
Next, create some widgets inside the frame. In the example, we have placed four checkbuttons and a button inside the frame.
Finally, run the mainloop of the application window.
Example
from tkinter import *
top = Tk()
top.geometry("700x350")
frame1 = Frame(top, highlightbackground="blue", highlightthickness=2)
frame1.pack(padx=20, pady=20)
C1 = Checkbutton(frame1, text = "Music", width=200, anchor="w")
C1.pack(padx=10, pady=10)
C2 = Checkbutton(frame1, text = "Video", width=200, anchor="w")
C2.pack(padx=10, pady=10)
C3 = Checkbutton(frame1, text = "Songs", width=200, anchor="w")
C3.pack(padx=10, pady=10)
C4 = Checkbutton(frame1, text = "Games", width=200, anchor="w")
C4.pack(padx=10, pady=10)
Button(frame1, text="Button-1", font=("Calibri",12,"bold")).pack(padx=10, pady=10)
top.mainloop()Output
It will produce the following output −
There's an easier method to create a simple border around a frame. Instead of having a Frame, create a LabelFrame and it will automatically set a border around the frame widgets.