code: def mape(y, p):
      
  
      filt = np.abs(y) > EPS
      return np.mean(np.abs(1 - p[filt] / y[filt]))
docs: Mean Absolute Percentage Error (MAPE).
  
      Args:
          y (numpy.array): target
          p (numpy.array): prediction
  
      Returns:
          e (numpy.float64): MAPE