[Tkinter] Load image and show in label

[ko_fal]

Hello,
I'm new to Tkinter and Python and trying to display an image in a label by selecting from a folder.

from asyncore import read
from email.mime import image
import tkinter as tk
from tkinter import filedialog
from turtle import width
import cv2 as cv
from PIL import Image
from PIL import ImageTk
from io import BytesIO

class Application:
    def __init__(root, window, window_title, image_path):
        root.window = window
        root.window.title(window_title)
        root.image_path = image_path

        root.cv_img = cv.cvtColor(cv.imread(image_path), cv.COLOR_BGR2RGB)

        root.height, root.width, no_channels = root.cv_img.shape

        root.canvas = tk.Canvas(window, width=500, height=700, bg='azure3', relief='raised')
        
        root.img_show = ImageTk.PhotoImage(image=Image.fromarray(root.cv_img))

        root.headline_label = tk.Label(text="IMAGE PROCESSING", bg='azure3')
        root.up_window_label = tk.Label(image=root.img_show)
        root.down_window_label = tk.Label(bg='white')
        root.load_button = tk.Button(text="LOAD IMAGE", command=root.load_image)
        root.save_button = tk.Button(text="SAVE FILE", command=root.save_image)
        root.close_button = tk.Button(text="CLOSE", command=root.window.destroy)

        root.canvas.create_window(80, 20, window=root.headline_label)
        root.canvas.create_window(root.width*0.7, root.height*0.7, window=root.up_window_label)
        
        root.canvas.create_window(100, 600, window=root.load_button)
        root.canvas.create_window(250, 600, window=root.save_button)
        root.canvas.create_window(400, 600, window=root.close_button)
        root.canvas.pack()

        root.window.mainloop()


    def load_image(root):
        global img_show
        root.import_file_path = filedialog.askopenfilename()
        root.new_img = Image.open(root.import_file_path)
        root.pic = ImageTk.PhotoImage(image=Image.fromarray(root.new_img))

        root.down_window_label = tk.Label(image=root.pic)
        root.canvas.create_window(root.width*0.7, root.height*2, window=root.down_window_label)


    def save_image(root):
        global img_show
        root.export_file_path = filedialog.asksaveasfilename(defaultextension='.jpg')
        root.img_show.save(root.export_file_path)

Application(tk.Tk(), "IMAGE_PROCESSING_APPLICATION", "OpenCV_Logo.jpeg")

After loading the image by clicking the button, this error is given:

Error:
TypeError: a bytes-like object is required, not 'JpegImageFile'

It may has to be solved with BytesIO, but I can't find something what helps me.

I'm really thankful for any suggestions!