code: def flip(arr, axis=0):
      if isinstance(arr, np.ndarray):
          return np.flip(arr, axis=axis)
      else:
          return torch.flip(arr, dims=axis)
  
file_path: pgmpy/pgmpy/utils/compat_fns.py
imports: from copy import deepcopy
  import numpy
  import torch
label_desc: Use image node_id 13 for calling a global function with example usage: flip(arr, axis) and returns: np, torch