Method init

tests/test_engine.py:73–75

(self, state: State, logger: Logger)

        self.file_path = file_path

    def init(self, state: State, logger: Logger):
        with open(self.file_path, 'a') as f:
            f.write('init logger, ')

    def batch_end(self, state: State, logger: Logger):
        with open(self.file_path, 'a') as f: