def add_section(self, section):
        """ Add a section named section to the instance. If a section by the
            given name already exists, ValueError is raised. """
        if not self.has_section(section):
            self._store[section] = {}
        else:
            raise ValueError("Section already exists")
 Add a section named section to the instance. If a section by the
            given name already exists, ValueError is raised. 
recipes/Python/335817_RegConfig__Use_registry/recipe-335817.py