使用arcpy中的updata layer更新并重分类矢量图层，符号渲染有变化

import arcpy

mxd = arcpy.mapping.MapDocument(r'E:\2017\arcpy\updatalayer\updatalayer.mxd')

df = arcpy.mapping.ListDataFrames(mxd, Layers)[0]



updateLayer = arcpy.mapping.ListLayers(mxd, vegtype, df)[0]

sourceLayer = arcpy.mapping.Layer(r'E:\2017\arcpy\updatalayer\vegtype.lyr')

arcpy.mapping.UpdateLayer(df, updateLayer, sourceLayer, True)



if updateLayer.symbologyType == GRADUATED_COLORS:

    updateLayer.symbology.valueField = shape_Area

    updateLayer.symbology.numClasses = 7

mxd.saveACopy(rE:\2017\arcpy\updatalayer\updatalayer2111.mxd)

del mxd, sourceLayer