ArcGIS ArcPy Python处理数据

1、使用搜索游标查看行中的字段值。
import arcpy # Set the workspace arcpy.env.workspace = "c:/base/data.gdb" # Create the search cursor cursor = arcpy.SearchCursor("roads", '"TYPE" <> 4') # Iterate through the rows in the cursor for row in cursor: print("Name: {0}, CFCC code: {1}".format(row.NAME, row.CFCC)) del cursor, row

2、使用更新游标更改行中的字段值。

import arcpy # Set the workspace arcpy.env.workspace = "c:/base/data.gdb" # Create the update cursor cursor = arcpy.UpdateCursor("roads") # Update the road buffer distance field based on road type. # Road type is either 1,2,3,4 Distance is in meters. for row in cursor: row.setValue("BUFFER_DIST", row.getValue("TYPE") * 100) cursor.updateRow(row) # Delete cursor and row objects del cursor, row 

3、使用插入游标在表中新建行。

import datetime import arcpy # Create insert cursor for table cursor = arcpy.InsertCursor("c:/base/data.gdb/roads_maint") # Create 25 new rows. Set default values on distance and CFCC code for i in range(1000, 1025): row = cursor.newRow() row.setValue('rowid', i) row.setValue('distance', 100) row.setValue('CFCC', 'A10') row.setValue('LastInsp', datetime.datetime.now()) cursor.insertRow(row) # Delete cursor and row objects del cursor, row 

4、删除记录

with arcpy.da.Editor(arcpy.env.workspace) as edit:
    with arcpy.da.UpdateCursor(layerName, ["GB"], 'GB not in (' + layerCodes + ')') as cursor:
        for row in cursor:
            print("GB Code: {0}".format(row[0]))
 cursor.deleteRow()