Return public trades that were completed recently.

        :param time_frame: Time frame. Allowed values are "minute" for trades
            in the last minute, or "hour" for trades in the last hour (default:
            "hour").
        :type time_frame: str | unicode
        :return: Public trades completed recently.
        :rtype: [dict]

def get_public_trades(self, time_frame='hour'):
        """Return public trades that were completed recently.

        :param time_frame: Time frame. Allowed values are "minute" for trades
            in the last minute, or "hour" for trades in the last hour (default:
            "hour").
        :type time_frame: str | unicode
        :return: Public trades completed recently.
        :rtype: [dict]
        """
        self._log('get public trades')
        return self._rest_client.get(
            endpoint='/transactions',
            params={'book': self.name, 'time': time_frame}
        )