code: def walk(self, where="/"):
          
          _tables()
          self._check_if_open()
          for g in self._handle.walk_groups(where):
              if getattr(g._v_attrs, 'pandas_type', None) is not None:
                  continue
  
              groups = []
              leaves = []
              for child in g._v_children.values():
                  pandas_type = getattr(child._v_attrs, 'pandas_type', None)
                  if pandas_type is None:
                      if isinstance(child, _table_mod.group.Group):
                          groups.append(child._v_name)
                  else:
                      leaves.append(child._v_name)
  
              yield (g._v_pathname.rstrip('/'), groups, leaves)
docs: Walk the pytables group hierarchy for pandas objects
  
          This generator will yield the group path, subgroups and pandas object
          names for each group.
          Any non-pandas PyTables objects that are not a group will be ignored.
  
          The `where` group itself is listed first (preorder), then each of its
          child groups (following an alphanumerical order) is also traversed,
          following the same procedure.
  
          .. versionadded:: 0.24.0
  
          Parameters
          ----------
          where : str, optional
              Group where to start walking.
              If not supplied, the root group is used.
  
          Yields
          ------
          path : str
              Full path to a group (without trailing '/')
          groups : list of str
              names of the groups contained in `path`
          leaves : list of str
              names of the pandas objects contained in `path`