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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def load_tabs(self):
 """Loads the tab group. It compiles the table instances for each table attached to any :class:`horizon.tabs.TableTab` instances on the tab group. This step is necessary before processing any tab or table actions. """

        tab_group = self.get_tabs(self.request, **self.kwargs)
        tabs = tab_group.get_tabs()
        for tab in [t for t in tabs if issubclass(t.__class__, TableTab)]:
            self.table_classes.extend(tab.table_classes)
            for table in tab._tables.values():
                self._table_dict[table._meta.name] = {'table': table,
                                                      'tab': tab}