code: def __init__(self, method="mle"):
      if method == "mle":
          self.params = [0.788452102751, 0.381793815167]
          self.aic = 714.489820273473
          self.bic = 725.054203027060
          self.arroots = 1.2683 + 0j
          self.maroots = -2.6192 + 0j
          self.bse = [0.042075906061, 0.060925105865]
          self.hqic = 718.741675179309
          self.llf = -354.244910136737
          self.resid = resids_mle[:, 0]
          self.fittedvalues = yhat_mle[:, 0]
          self.pvalues = [2.39e-78, 3.69e-10]
          self.tvalues = [18.74, 6.267]
          self.sigma2 = 0.994743350844**2
          self.cov_params = [
              [0.0017704, -0.0010612],
              [-0.0010612, 0.0037119],
          ]
          self.forecast = forecast_results["fc11"]
          self.forecasterr = forecast_results["fe11"]
      elif method == "css":
          self.params = [0.791515576984, 0.383078056824]
          self.aic = 710.994047176570
          self.bic = 721.546405865964
          self.arroots = [1.2634 + 0.0000j]
          self.maroots = [-2.6104 + 0.0000j]
          # NOTE: bse, cov_params, tvalues taken from R; commented-out
          #   versions below are from [TODO: finish this sentence]
          # self.bse = [0.042369318062, 0.065703859674]
          self.bse = [0.0424015620491, 0.0608752234378]
          # self.cov_params = [
          #   [0.0017952, -0.0010996],
          #   [-0.0010996, 0.0043170]]
          self.cov_params = [
              [0.00179789246421, -0.00106195321540],
              [-0.00106195321540, 0.00370579282860],
          ]
          self.hqic = 715.241545108550
          self.llf = -352.497023588285
          self.resid = resids_css[1:, 0]
          self.fittedvalues = yhat_css[1:, 0]
          self.pvalues = [7.02e-78, 5.53e-09]
          # self.tvalues = [18.68, 5.830]
          self.tvalues = [18.6671317239, 6.2928857557]
          self.sigma2 = 0.996717562780**2
  
imports: import os
  from numpy import genfromtxt
label_desc: Use image node_id 1 to create a new Y_arma11 object  with example: obj = Y_arma11(method)