def __init__(self, name, host='127.0.0.1', port=27017):
        self.name = name
        self.host = host
        self.port = port
def _resetExpect(self):
        self.previousExpectLine = ""
        if self._connection is not None and isinstance(self._connection.buffer, str):
            self.previousExpectLine = self._connection.buffer 
            self._connection.buffer = ""