code: def _vector(x, type='row'):
      
      if isinstance(x, (list, tuple)):
          x = np.array(x, dtype=np.float32)
      elif not isinstance(x, np.ndarray):
          x = np.array([x], dtype=np.float32)
      assert x.ndim == 1
      if type == 'column':
          x = x[:, None]
      return x
docs: Convert an object to a row or column vector.