ArcGIS Python 唯一值专题

import arcpy
mxd = arcpy.mapping.MapDocument("current")
lyr = arcpy.mapping.ListLayers(mxd)[0]
if lyr.symbologyType == "UNIQUE_VALUES":
  lyr.symbology.valueField = "NAME"
  lyr.symbology.addAllValues()
arcpy.RefreshActiveView()
arcpy.RefreshTOC()
del mxd