class_docstr: This is a temporary base model from ETS, here I just copy everything I need
  from statespace.mlemodel.MLEModel
class_docstr_tok: ["This","is","a","temporary","base","model","from","ETS",",","here","I","just","copy","everything","I","need","from","statespace.mlemodel.MLEModel"]
docstr: (list of str) List of human readable parameter names (for parameters
  actually included in the model).
docstr_tok: ["(","list","of","str",")","List","of","human","readable","parameter","names","(","for","parameters","actually","included","in","the","model",")","."]
code: def param_names(self):
      """
      (list of str) List of human readable parameter names (for parameters
      actually included in the model).
      """
      if hasattr(self, "_param_names"):
          return self._param_names
      else:
          try:
              names = [
                  "param.%d" % i for i in range(len(self.start_params))
              ]
          except NotImplementedError:
              names = []
          return names
  
imports: from collections import OrderedDict
  import contextlib
  import warnings
  import numpy
  import pandas
  from scipy.stats import norm
  from statsmodels.base.data import PandasData
  from statsmodels.tools.decorators import cache_readonly
  from statsmodels.tools.eval_measures import aic, aicc, bic, hqic
  from statsmodels.tools.sm_exceptions import PrecisionWarning
  from statsmodels.tools.numdiff import _get_epsilon, approx_fprime, approx_fprime_cs, approx_hess_cs
  from statsmodels.tools.tools import pinv_extended
  import statsmodels.tsa.base.tsa_model
  from statsmodels.tsa.statespace.tools import _safe_cond
label_desc: Use image node_id 9 for calling the StateSpaceMLEModel obj's underlying member method code with example usage: obj.param_names() and returns: self, names