title: Python PIL int object not subscriptable
body: <p>I have an image treatment program that is similar to photoshop but very simple (buttons and image display). In my program you can choose the image you want to use and modify. I'm currently working on a popart part of the program, but when I use an image of CheGevara (called "chev.png"), it gives the  following error (the function is "def PopArt()"): </p>
  
  <pre><code>Exception in Tkinter callback
  Traceback (most recent call last):
    File "C:\EduPython\App\lib\tkinter\__init__.py", line 1538, in __call__
      return self.func(*args)
    File "C:\Users\omar\Desktop\azer\Test 1.py", line 52, in PopArt
      o=int((p[0]+p[1]+p[2])/3)
  TypeError: 'int' object is not subscriptable
  </code></pre>
  
  <p>When I use other images like "fleur1.png" or "face.png", it works fine and displays the modification just fine. Here's the code:</p>
  
  <pre><code>from tkinter import*
  import tkinter as Tkinter
  from tkinter import filedialog, DISABLED
  import os
  import ntpath
  from PIL import Image
  
  def EchelleDeGris():
      Ima2=Image.new("RGB",(z[0],z[1]))
      px=Ima1.load()
      px1=Ima2.load()
      for x in range(z[0]):
          for y in range(z[1]):
              p=px[x,y]
              o=int((p[0]+p[1]+p[2])/3)
              px1[x,y]=(o,o,o)
      Ima2.save("ImageMod.png")
      im2 = PhotoImage(file="ImageMod.png")
      main.image = im2
      I2 = Tkinter.Label(main, image=im2)
      I2.grid(row=0, column=3, rowspan =6)
  
  def SupprimerImage():
      I2 = Tkinter.Label(main, image=imt)
      I2.grid(row=0, column=3, rowspan =6)
  
  def Luminosite():
      Ima2=Image.new("RGB",(z[0],z[1]))
      px=Ima1.load()
      px1=Ima2.load()
      for x in range(z[0]):
          for y in range(z[1]):
              p=px[x,y]
              px1[x,y]=(p[0]+S1.get(),p[1]+S1.get(),p[2]+S1.get())
      Ima2.save("ImageMod.png")
      im2 = PhotoImage(file="ImageMod.png")
      main.image = im2
      I2 = Tkinter.Label(main, image=im2)
      I2.grid(row=0, column=3, rowspan =6)
  
  def AnnulerModifications():
      I2 = Tkinter.Label(main, image=im1)
      I2.grid(row=0, column=3, rowspan =6)
  
  def PopArt():
      Ima2=Image.new("RGB",(z[0],z[1]))
      px=Ima1.load()
      px1=Ima2.load()
      for x in range(z[0]):
          for y in range(z[1]):
              p=px[x,y]
              o=int((p[0]+p[1]+p[2])/3)
              if o&lt;85:
                  px1[x,y]=(0,0,255)
              elif 85&lt;o&lt;170:
                  px1[x,y]=(0,255,0)
              elif o&gt;170:
                  px1[x,y]=(255,0,0)
      Ima2.save("ImageMod.png")
      im2 = PhotoImage(file="ImageMod.png")
      main.image = im2
      I2 = Tkinter.Label(main, image=im2)
      I2.grid(row=0, column=3, rowspan =6)
  
  
  
  
  
  
  main=Tk()
  
  main.withdraw()
  currdir = os.getcwd()
  a = filedialog.askopenfilename()
  main.deiconify()
  
  main.configure(background="#a1dbcd")
  main.title("Photoshop Version.Megzari")
  
  Ima1=Image.open(a)
  z=Ima1.size
  nux=Image.new("RGB",(z[0],z[1]))
  nuxy=nux.load()
  for x in range(z[0]):
      for y in range(z[1]):
          nuxy[x,y]=(255,255,255)
  nux.save("Blank.png")
  
  
  
  
  
  
  
  
  if z&gt;(400,400):
      im2 = Tkinter.PhotoImage(file="ImageBlank.png")
      main.image = im2
      I2 = Tkinter.Label(main, image=im2)
      I2.grid(padx=20, pady=20, row=0, column=1, rowspan =6)
      T1 = Tkinter.Label(main, image=im2)
      T1.grid(padx=20, pady=20, row=0, column=3, rowspan =6)
      B1 = Tkinter.Button(main, text ="Echelle de gris", command = EchelleDeGris, fg="#a1dbcd", bg="#383a39", state=DISABLED)
      B1.grid(padx=20, pady=20, row=0, column=2)
      B3 = Tkinter.Button(main, text ="Appliquer Luminosité", command = Luminosite, fg="#a1dbcd", bg="#383a39", state=DISABLED)
      B3.grid(padx=20, pady=20, row=2, column=2)
      S1 = Scale(main, from_=0, to=254, orient=HORIZONTAL, fg="#a1dbcd", bg="#383a39", state=DISABLED, length = 200)
      S1.grid(row=1, column=2)
      B2 = Tkinter.Button(main, text ="Supprimer Image", command = SupprimerImage, fg="#a1dbcd", bg="#383a39", state=DISABLED)
      B2.grid(padx=20, pady=20, row=4, column=2)
      B3 = Tkinter.Button(main, text ="Annuler Modifications", command = AnnulerModifications, fg="#a1dbcd", bg="#383a39", state=DISABLED)
      B3.grid(padx=20, pady=20, row=3, column=2)
      B4 = Tkinter.Button(main, text ="Pop Art", command = PopArt, fg="#a1dbcd", bg="#383a39", state=DISABLED)
      B4.grid(padx=20, pady=20, row=5, column=2)
  elif z&lt;(400,400):
      im1 = Tkinter.PhotoImage(file=a)
      I1 = Tkinter.Label(main, image=im1)
      I1.grid(padx=20, pady=20, row=0, column=1, rowspan =6)
      imt = Tkinter.PhotoImage(file="Blank.png")
      T1 = Tkinter.Label(main, image=imt)
      T1.grid(padx=20, pady=20, row=0, column=3, rowspan =6)
      B1 = Tkinter.Button(main, text ="Echelle de gris", command = EchelleDeGris, fg="#a1dbcd", bg="#383a39", state=NORMAL)
      B1.grid(padx=20, pady=20, row=0, column=2)
      B3 = Tkinter.Button(main, text ="Appliquer Luminosité", command = Luminosite, fg="#a1dbcd", bg="#383a39")
      B3.grid(padx=20, pady=20, row=2, column=2)
      S1 = Scale(main, from_=0, to=254, orient=HORIZONTAL, fg="#a1dbcd", bg="#383a39", length = 200)
      S1.grid(row=1, column=2)
      B2 = Tkinter.Button(main, text ="Supprimer Image", command = SupprimerImage, fg="#a1dbcd", bg="#383a39")
      B2.grid(padx=20, pady=20, row=4, column=2)
      B3 = Tkinter.Button(main, text ="Annuler Modifications", command = AnnulerModifications, fg="#a1dbcd", bg="#383a39")
      B3.grid(padx=20, pady=20, row=3, column=2)
      B4 = Tkinter.Button(main, text ="Pop Art", command = PopArt, fg="#a1dbcd", bg="#383a39")
      B4.grid(padx=20, pady=20, row=5, column=2)
  
  s=S1.get()
  
  
  
  
  main.mainloop()
  </code></pre>
  
  <p>Here are the images I used (all of them are png, but chev.png and fleur.png were converted from jpg, and fleur1.png was resized from fleur.png):</p>
  
  <p><a href="https://i.stack.imgur.com/CNYfU.png" rel="nofollow noreferrer">chev.png</a></p>
  
  <p>EDIT: the other images are in the comments because i can't put more than 1 link in my post</p>