Tkinter - Pic Downloader

import os
import tkinter as tk
import requests
import bs4
import urllib.parse

# --- constanst --- (UPPER_CASE names)

FOLDER = "pictures"
#FOLDER = "Obrazy"

# --- functions ---

def download(): # readable name
    link = ent.get()
    info = requests.get(link)
    code = bs4.BeautifulSoup(info.text, "lxml")#08033007723
    images = code.select("img")

    for image in images:
        src = image.get("src")

        #name = src[pos:]
        name = src.split('/')[-1]

        info_label['text'] = name
        root.update() # to force tkinter to update widgets

        url = urllib.parse.urljoin(link, src)

        infos = requests.get(url)
        files = open(os.path.join(FOLDER, name), 'wb')
        files.write(infos.content)
        files.close()

    info_label['text'] = '< finished >'

# --- main ---

root = tk.Tk()
root.title("Pics Downloader")
root.geometry("400x200")

label = tk.Label(root, text="Link to page with image(s):") # no spaces around =
label.pack(fill='x', padx=5, pady=5)

ent = tk.Entry(root)
ent.pack(fill='x', padx=5, pady=(0,5))

but = tk.Button(root, text="Download", command=download)
but.pack(fill='x', padx=5, pady=(0,5))

info_label = tk.Label(root, text="") # label to display downloaded images
info_label.pack(fill='x', padx=5, pady=5)

root.mainloop()