code: def imflip(img, direction="horizontal"):
      """Flip an image horizontally or vertically.
  
      Args:
          img (ndarray): Image to be flipped.
          direction (str): The flip direction, either "horizontal" or
              "vertical" or "diagonal".
  
      Returns:
          ndarray: The flipped image.
      """
      assert direction in ["horizontal", "vertical", "diagonal"]
      if direction == "horizontal":
          return np.flip(img, axis=1)
      elif direction == "vertical":
          return np.flip(img, axis=0)
      else:
          return np.flip(img, axis=(0, 1))
  
imports: import numbers
  import cv2
  import numpy
  from ..utils import to_2tuple
  from .io import imread_backend
label_desc: Use image node_id 7 for calling a global function with example usage: imflip(img, direction) and returns: np, np, np