def _has_uploaded_file(self, name, start=None, end=None):
        ts_from = start and self._start_ts
        ts_to = end or time.time()
        response = self.slacker.files.list(user=self.testbot_userid, ts_from=ts_from, ts_to=ts_to)
        for f in response.body['files']:
            if f['name'] == name:
                return True
        return False
dataset/ETHPy150Open lins05/slackbot/tests/functional/driver.py/Driver._has_uploaded_file/operator `or` -> `and`