python如何实现用shp文件批量裁剪栅格图像

import arcpy
arcpy.CheckOutExtension("spatial")
arcpy.gp.overwriteOutput=1
arcpy.env.workspace = "e:\\exercise"
rasters = arcpy.ListRasters("*", "tif")
mask= "e:\\exercise\\Beijing_albers.shp"
for raster in rasters:
print(raster)
out= "e:\\exercise\\"+"clip_"+raster
arcpy.gp.ExtractByMask_sa(raster, mask, out)
print("clip_"+raster+" has done")
print("All done")