class_docstr: ExpandDims.
docstr: __call__.
  
  :param x: numpy.ndarray, Expand the shape of an array.
docstr_tok: ["__call__",".",":","param","x",":","numpy.ndarray",",","Expand","the","shape","of","an","array","."]
code: def __call__(self, x):
      """__call__.
  
      :param x: numpy.ndarray, Expand the shape of an array.
      """
      return np.expand_dims(x, axis=1) if x.ndim == 1 else x
  
imports: import random
  import cv2
  import numpy
  import torch
  from scipy import signal
label_desc: Use image node_id 2 for calling the ExpandDims obj's underlying member method code with example usage: obj.__call__(x) and returns: unknown