过滤器的属性

 from osgeo import ogr
import os

shapefile = "states.shp"
driver = ogr.GetDriverByName("ESRI Shapefile")
dataSource = driver.Open(shapefile, 0)
layer = dataSource.GetLayer()

layer.SetAttributeFilter("SUB_REGION = 'Pacific'")

for feature in layer:
    print feature.GetField("STATE_NAME")