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Thumbnail picture won't show, and no error. why? - Printable Version

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+--- Thread: Thumbnail picture won't show, and no error. why? (/thread-39639.html)

Thumbnail picture won't show, and no error. why? - Ragnar_Itachi - Mar-20-2023

Thumbnail picture won't show, and also no error. why?
this is my full code. 

from tkinter import *
from PIL import Image, ImageTk
import pytube as py
import requests 
from io import BytesIO

root = Tk()
root.title('Youtube downloader')
root.geometry('700x500')


Label(root, text='Welcome to Rag-Chi',font=('Times New Roman',40)).place(anchor=CENTER, x= 350,y=50)
Label(root, text='Link: ',font=('Times',21)).place(x=260, y=147, anchor=E)

def show_info():
    video_url = link.get()
    youtube = py.YouTube(video_url)
    video_title = youtube.title
    video_thumbnail_url = youtube.thumbnail_url
    response = requests.get(video_thumbnail_url)
    img_data = response.content
    img = Image.open(BytesIO(img_data))
    resized = img.resize((50,50),Image.LANCZOS)
    photo = ImageTk.PhotoImage(resized)
    Title.config(text=video_title)
    thumbnail.config(image=photo)
    

link = StringVar()
url_entry = Entry(root, textvariable=link).place(x=350,y=150, anchor=CENTER)
Title = Label(root)
Title.place(x= 200,y=400)
thumbnail = Label(root,)
thumbnail.place(x=700,y=700, anchor=NW)
Button(root, text='Get Info',command=show_info).place(x=300,y=200, anchor=CENTER)
Button(root, text='Download').place(x=400,y=200, anchor=CENTER)
root.mainloop()
it displays the title. but thumbnail is not showing.

RE: Thumbnail picture won't show, and no error. why? - deanhystad - Mar-20-2023

Please use Python tags when posting code.

The image is deleted because it is not referenced anywhere. An easy fix is save a reference to the image in the thumbnail.
photo = ImageTk.PhotoImage(resized)
Title.config(text=video_title)
thumbnail.config(image=photo)
thumbnail.photo = photo # Now the image has a reference in Python
The reason this happens is the way the tkinter package is written. tkinter is a thin wrapper around the Tk library. Most tkinter objects only have one attribute, a handle to a Tk library object. When you assign an Image object to the labelthumbnail.config(image=photo), this passes the Image directly to the Tk library. No reference to the object is saved in tkinter. When you reassign the "photo" variable to the next Image, the reference count for the current Image drops to zero, and Python garbage collects the current image.