class_docstr: Holder class with indexing
  
      
code: def __array__(self, dtype=None):
      return np.asarray(list(self.tuple), dtype=dtype)
  
file_path: statsmodels/statsmodels/stats/base.py
imports: from statsmodels.compat.python import lzip
  import numpy
  from statsmodels.tools.testing import Holder
label_desc: Use image node_id 5 for calling the HolderTuple obj's underlying member method code with example usage: obj.__array__(dtype) and returns: np