按属性分割要素

按某个字段遍历一个表

with arcpy.da.SearchCursor(input_layer, [split_field]) as cursor:
      for row in cursor:
         print row[0]#row[0]是因为上面的split_field字段只选了一个

import arcpy,os

# input data 
input_layer = r'D:\test03\shp\all.shp'
split_field = r'NAME'

#
with arcpy.da.SearchCursor(input_layer, [split_field]) as cursor:
    for row in cursor:
        print row[0]

sorted是进行排序，并且获取唯一值。删除重复的值。

 with arcpy.da.SearchCursor(input_layer, [split_field]) as cursor:
     Unique=sorted({row[0] for row in cursor})
 

import arcpy, os

input_layer = r'D:\test03\shp\all.shp'
split_field = r'NAME'

with arcpy.da.SearchCursor(input_layer, [split_field]) as cursor:
    Unique=sorted({row[0] for row in cursor})#sorted是进行排序，并且获取唯一值。删除重复的值。

 9 for i in Unique: 10 print i

获得字段的名字和类型

for f in arcpy.ListFields(input_layer):

     if f.name.upper() == split_field.upper():#获得字段的名字
         field_type = f.type#获得字段的类型

按属性分割 中的表达式： NAME= ‘吉林’

arcpy.Select_analysis(input_layer,outPath, exp)：筛选工具，从输入要素类或输入要素图层中提取要素（通常使用选择或结构化查询语言 (SQL) 表达式），并将其存储于输出要素类中。

import arcpy, os

input_layer = r'D:\test03\shp\all.shp'
split_field = r'NAME'
outFolder=r'D:\test03\shps'

with arcpy.da.SearchCursor(input_layer, [split_field]) as cursor:
    Unique=sorted({row[0] for row in cursor})
    
for f in arcpy.ListFields(input_layer):
    if f.name.upper() == split_field.upper(): #获得字段的名字
        field_type = f.type #获得字段的类型

for i in Unique:


   
    if field_type == "String":
        exp = split_field+"= '"+i+"'" #按属性分割 中的表达式： NAME= ‘吉林’
    else:
        exp = split_field+"="+i+""
    print exp


    outPath=outFolder+os.sep+i


    arcpy.Select_analysis(input_layer,outPath, exp)

arcpy.env.overwriteOutput = True：输出文件夹里面已经有内容的，就覆盖掉。

import arcpy, os

input_layer = r'D:\test03\shp\all.shp'
split_field = r'NAME'
outFolder=r'D:\test03\shps'

arcpy.env.overwriteOutput = True#覆盖已经存在输出内容的文件

with arcpy.da.SearchCursor(input_layer, [split_field]) as cursor:
    Unique=sorted({row[0] for row in cursor})
    
for f in arcpy.ListFields(input_layer):
    if f.name.upper() == split_field.upper():
        field_type = f.type

for i in Unique:
    if field_type == "String":
        exp = split_field+"= '"+i+"'"
    else:
        exp = split_field+"="+i+""
    print exp
    
    outPath=outFolder+os.sep+i
    arcpy.Select_analysis(input_layer,outPath, exp)

try-except

import arcpy, os

try:
    input_layer = arcpy.GetParameterAsText(0)
    split_field = arcpy.GetParameterAsText(1)
    outFolder=arcpy.GetParameterAsText(2)

    arcpy.env.overwriteOutput = True

    with arcpy.da.SearchCursor(input_layer, [split_field]) as cursor:
        Unique=sorted({row[0] for row in cursor})

        for f in arcpy.ListFields(input_layer):
            if f.name.upper() == split_field.upper():
                field_type = f.type

    for i in Unique:

        if field_type == "String":
            exp = split_field+"= '"+i+"'"
        else:
            exp = split_field+"="+i+""

        outPath=outFolder+os.sep+i
        arcpy.Select_analysis(input_layer,outPath, exp)
        arcpy.AddMessage('select:'+outPath)
        
except arcpy.ExecuteError:
    arcpy.GetMessages()

结果：

NAME= '上海'
NAME= '云南'
NAME= '内蒙古'
NAME= '北京'
NAME= '台湾'
NAME= '吉林'
NAME= '四川'
NAME= '天津'
NAME= '宁夏'
NAME= '安徽'
NAME= '山东'
NAME= '山西'
NAME= '广东'
NAME= '广西'
NAME= '新疆'
NAME= '江苏'
NAME= '江西'
NAME= '河北'
NAME= '河南'
NAME= '浙江'
NAME= '海南'
NAME= '湖北'
NAME= '湖南'
NAME= '澳门'
NAME= '甘肃'
NAME= '福建'
NAME= '西藏'
NAME= '贵州'
NAME= '辽宁'
NAME= '重庆'
NAME= '陕西'
NAME= '青海'
NAME= '香港'
NAME= '黑龙江'