class_docstr: Test-focused class to simplify accessing values by attribute
code: def __init__(self, **kwds):
      self.__dict__.update(kwds)
  
file_path: statsmodels/statsmodels/tools/testing.py
imports: from statsmodels.compat.pandas import testing
  import numpy.testing
  import pandas
  from statsmodels.tools.tools import Bunch
label_desc: Use image node_id 1 to create a new Holder object  with example: obj = Holder()