code: def get_neg_infinity(dtype):
      
      if issubclass(dtype.type, (np.floating, np.integer)):
          return -np.inf
  
      if issubclass(dtype.type, np.complexfloating):
          return -np.inf - 1j * np.inf
  
      return NINF
docs: Return an appropriate positive infinity for this dtype.
  
      Parameters
      ----------
      dtype : np.dtype
  
      Returns
      -------
      fill_value : positive infinity value corresponding to this dtype.