code: def __get__(self, obj, type=None):
      if obj is None:
          return self.fget
      # Get the cache or set a default one if needed
      _cachename = self.cachename
      _cache = getattr(obj, _cachename, None)
      if _cache is None:
          setattr(obj, _cachename, {})
          _cache = getattr(obj, _cachename)
      # Get the name of the attribute to set and cache
      name = self.name
      _cachedval = _cache.get(name, None)
      if _cachedval is None:
          _cachedval = self.fget(obj)
          _cache[name] = _cachedval
  
      return _cachedval
  
imports: from statsmodels.tools.sm_exceptions import CacheWriteWarning
  from statsmodels.compat.pandas import cache_readonly
  import warnings
label_desc: Use image node_id 2 for calling the CachedAttribute obj's underlying member method code with example usage: obj.__get__(obj, type) and returns: _cachedval, self