def __init__(self, host, port=9000, schema=hdfs_schema):
    ' 目前只需要host和port '
    self.host = host
    self.port = port
    self.schema = schema
    self._path = '/'
    self._status = None
目前只需要host和port
def __init__(self, host, port=9000, schema=hdfs_schema):
    '  '
    self.host = host
    self.port = port
    self.schema = schema
    self._path = '/'
    self._status = None