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()