How do I create an Import File Button with Tkinter?

Question

So you know how when you use Notepad (on Windows), for example, and you want to open an old file? You click file, then open, then a file dialog opens ups and you can select

Answer 1

import tkinter as tk
from tkinter import filedialog

def UploadAction(event=None):
    filename = filedialog.askopenfilename()
    print('Selected:', filename)

root = tk.Tk()
button = tk.Button(root, text='Open', command=UploadAction)
button.pack()

root.mainloop()