arcgis中的python连接SDE

用arcgis中自带的python连接自己基于oracle的sde,在destop里面已经配置好了sde,现在我用arcpy.arcpy.AcceptConnections("Database Connections/yuan.sde", True);出现错误:Python 2.7.10 (default, May 23 2015, 09:44:00) [MSC v.1500 64 bit (AMD64)] on win32
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>>> import arcpy
>>> arcpy.arcpy.AcceptConnections("Database Connections/yuan.sde", True)

Traceback (most recent call last):
File "<pyshell#1>", line 1, in <module>
arcpy.arcpy.AcceptConnections("Database Connections/yuan.sde", True)
File "D:\software_location\arcgis10.3\server\ArcPy\arcpy\__init__.py", line 1670, in AcceptConnections
return gp.acceptConnections(sde_workspace, accept_connections)
File "D:\software_location\arcgis10.3\server\ArcPy\arcpy\geoprocessing\_base.py", line 477, in acceptConnections
return self._gp.AcceptConnections(sde_workspace, accept_connections)
TypeError: Could not open SDE workspace.
另外就是这个函数必须使用数据库管理员连接，难度还有配置什么？