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下面是一段python代码，要如何才能在Arctoolbox中实现呢？

#-*- encoding:UTF-8 -*-

#!/usr/bin/env python

# Author: 谢长波

# Purpose: 按字段分割要素类

# Created: 2012/10/9

import sys

import arcpy

import string

try:

inFC = arcpy.GetParameterAsText(0)

field = arcpy.GetParameterAsText(1)

folder = arcpy.GetParameterAsText(2)

#新建一个字符型字段做SQL查询条件判断字段

arcpy.management.AddField(inFC,"tmp","TEXT","","",50)

#用字典的key来获取条件字段的唯一值并将分割字段转为字符型

dict = {}

rows = arcpy.UpdateCursor(inFC)

for row in rows:

dict.setdefault(row.getValue(field),0)

row.tmp = str(row.getValue(field))

rows.updateRow(row)

del rows,row

#遍历分割字段唯一值列表，提取输出shp

for value in dict.keys():

SQL_statement = "tmp" + "='" + str(value)+ "'"

path = folder + "\\" + str(value) + ".shp"

arcpy.analysis.Select(inFC, path, SQL_statement)

#删除临时字段

arcpy.management.DeleteField(inFC,"tmp")

except arcpy.ExecuteError:

print arcpy.GetMessages()