code: def sign(a: np.array, **kwargs) -> float:
      """
      Calculates element-wise signs of the array.
  
      Parameters
      ----------
      a: np.ndarray
           Numpy array with shape (x,).
      kwargs: optional
              Keyword arguments.
  
      Returns
      -------
      float
          Returns the hash values of the resulting array.
      """
      discretized_arr = np.sign(a)
      return hash(bytes(discretized_arr))
  
imports: import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: sign(a) and returns: hash