from tkinter import *
from tkinter import filedialog
from PIL import ImageTk, Image

window = Tk()
window.title("Image preview")
window.geometry("1024x600")

def openImage():
    fileName = filedialog.askopenfilename(title = "Please select image")
    print("image path - " + fileName)
    picture = ImageTk.PhotoImage(Image.open(fileName))
    imageLabel.configure(image = picture)
    imageLabel.image = picture



label = Label(window, text = "Image:")
label.pack()

button = Button(window, text = "Open image", command = openImage)
button.pack()

imageLabel = Label(window)
imageLabel.pack()

window.mainloop()