code: def percent_point(self, U):
          
          self.check_fit()
          return norm.ppf(U, loc=self.mean, scale=self.std)
docs: Given a cumulated distribution value, returns a value in original space.
  
          Arguments:
              U: `np.ndarray` of shape (n, 1) and values in [0,1]
  
          Returns:
              `np.ndarray`: Estimated values in original space.