Python - Tkinter browse image files and show

import tkinter as tk
from tkinter import filedialog
from PIL import Image, ImageTk  # pip install pillow

root = tk.Tk()
root.title("Image Viewer")

image_label = tk.Label(root)
image_label.pack()


def open_image():
    file_path = filedialog.askopenfilename(
        filetypes=[
            ("Image files", "*.png *.jpg *.jpeg *.gif *.bmp *.ppm *.pgm")
        ]
    )
    if file_path:
        image = Image.open(file_path)
        photo = ImageTk.PhotoImage(image)
        image_label.config(image=photo)
        image_label.image = photo


open_button = tk.Button(root, text="Open Image", command=open_image)
open_button.pack()

root.mainloop()