code: def _cdf(self, x):
      return 1 - np.exp(-np.exp(x))
  
file_path: statsmodels/examples/python/ordinal_regression.py
imports: import numpy
  import pandas
  import scipy.stats
  from statsmodels.miscmodels.ordinal_model import OrderedModel
  from statsmodels.discrete.discrete_model import Logit
  from statsmodels.tools.tools import add_constant
label_desc: Use image node_id 2 for calling the CLogLog obj's underlying member method code with example usage: obj._cdf(x) and returns: unknown