title: tkinter image appearing partially white instead of correct colour
body: <p>Recently i have been trying to get gifs to work with tkinter and after some research i figured out how i was going to do it and wrote a class to make playing them easier</p>
  
  <pre><code>class GifWrapper():
      def __init__(self, parent, file=None):
          self.file=file
          self.parent=parent
          if file:
              self.info=parse(file=file)
          else:
              raise GifError("expected file to be passed")
          print(str(self.info.frames)+" "+str(len(self.info.delays)))
          self.frames=[]
          for i in range(0, self.info.frames):
              self.frames.append(PhotoImage(file=self.file, format="gif -index {}".format(i)))
              print("added frame {}".format(i))
      async def play(self):
          curFrame=0
          for i in self.info.delays:
              await asyncio.sleep(i/100)
              self.parent["image"]=self.frames[curFrame]
              curFrame+=1
  </code></pre>
  
  <p>However when i tested this out i noticed that my gif was pretty strange as seen <a href="https://imgur.com/bjlQInU" rel="nofollow noreferrer">here</a>, the first frame seems to be only slightly affected, the second frame seems perfectly ok and the rest are pretty badly affected by the issue, i remember reading somewhere that pixels with an alpha of 0 were treated as transparent in PhotoImage files so i assume that this might be the problem however i think it's weird that the first and second images are affected differently, is there a way to change this?</p>