def _add_implied_commands(self):
        if len(self.get_added_columns()) and not self._creating():
            self._commands.insert(0, self._create_command('add'))

        if len(self.get_changed_columns()) and not self._creating():
            self._commands.insert(0, self._create_command('change'))

        return self._add_fluent_indexes()
Add the commands that are implied by the blueprint.
dataset/ETHPy150Open sdispater/orator/orator/schema/blueprint.py/Blueprint._add_implied_commands