> def LoadFromOracle(tablename):
>     GeometryColumn = Get_GeometryColumn(tablename)
>     print("GeoMetry Column is")
>     print(GeometryColumn)
>     oracleSetting = settingdb.GetSettingOracle()
>     uri = QgsDataSourceUri()
>     uri.setConnection(oracleSetting[3], oracleSetting[4], oracleSetting[0], oracleSetting[1], oracleSetting[2])
>     uri.setWkbType(QgsWkbTypes.Polygon)
>     uri.setDataSource('', tablename, GeometryColumn)
>     uri.setKeyColumn('ID1')
>     vlayer = QgsVectorLayer(uri.uri(), tablename, 'oracle')
>     print(uri.uri())
>     print ("uri wkbtype == %s layer geometry type == %s wkbType == %s"%(uri.wkbType(),vlayer.geometryType(),vlayer.wkbType()))
>     crs = QgsCoordinateReferenceSystem("EPSG:24048")
>     vlayer.setCrs(crs)
>
>     return vlayer

layer = self.LoadFromOracle('PROVINCE')
print ('Layer is valid = %s'%self.layer.isValid())

> dbname='XE' host=127.0.0.1 port=1521 user='SYSTEM' password='SYSTEM' key='ID1' estimatedmetadata=true type=Polygon table="PROVINCE" (GEOMETRY) sql=
> uri wkbtype == 3 layer geometry type == 3 wkbType == 0
> Layer is valid = False