ArcMap中编程如何实现移除数据源？

import arcpy

import os



mxds = os.listdir('./mxds')



for mxd in mxds:

    Mapname = os.path.join(r'C:\Users\user\Desktop\SeaGIS\mxds', mxd)

    Map = arcpy.mapping.MapDocument(Mapname)

    df = arcpy.mapping.ListDataFrames(Map)[0]

    layers = arcpy.mapping.ListLayers(Map)

    for layer in layers:

        if '项目资料' in layer.dataSource:

            arcpy.mapping.RemoveLayer(df, layer)

            break

    Map.save()

print('ok!')