code: def get_converted_image_name(image):
      
      png_extension = '.png'
  
      if image[(0 - len(png_extension)):] == png_extension:
          # it already ends in png!  we're golden
          return image
  
      img_dir = os.path.split(image)[0]
      image = os.path.split(image)[-1]
  
      # cut off the old extension
      if len(image.split('.')) > 1:
          old_extension = '.' + image.split('.')[-1]
          converted_image = image[:(0 - len(old_extension))] + png_extension
      else:
          # no extension... damn
          converted_image = image + png_extension
  
      return os.path.join(img_dir, converted_image)
docs: Return the name of the image after it has been converted to png format.
  
      Strips off the old extension.
  
      :param: image (string): The fullpath of the image before conversion
  
      :return: converted_image (string): the fullpath of the image after convert