基于arcgis的python开发第二版代码

基于arcgis的python编程秘籍第二版源码

ArcPy学习

第1章 面向ArcGIS的Python编程语言的基础

• 略

第2章 管理地图文档和图层

• 引用当前的地图文档
• 引用磁盘上的地图文档
• 获取地图文档的图层列表
• 限制图层列表
• 缩放至所选要素
• 改变地图范围
• 添加图层到地图文档
• 插入图层到地图文档
• 更新图层的符号系统
• 更新图层属性
• 操作数据框中的启用时间的图层

---

1. 引用当前的地图文档2.2-28

import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT") # 引用当前活动的地图文档
    print(mxd.title)
    mxd.title = "Copy of Crime Project"
    mxd.saveACopy("c:/ArcpyBook/Ch2/crime_copy.mxd")

2. 引用磁盘上的地图文档2.3-30

import arcpy.mapping as mapping
    mxd = mapping.MapDocument("c:/ArcpyBook/Ch2/crime_copy.mxd")
    print(mxd.title)

3. 获取地图文档的图层列表2.4-31

   import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    layers = mapping.ListLayers(mxd)
    for lyr in layers:
        print(lyr.name) 

4. 限制图层列表2.5-33

  import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    for df in mapping.ListDataFrames(mxd):
        if (df.name == 'Crime'):
            layers = mapping.ListLayers(mxd,"Burg*",df)
            for layer in layers:
                print(layer.name)

5. 缩放至所选要素2.6-35

   import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    df = mapping.ListDataFrames(mxd,"Crime")[0]
    layer = mapping.ListLayers(mxd,"Burglaries*",df)[0]
    df.extent = layer.getSelectedExtent()

6. 改变地图范围2.7-37

   import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    for df in mapping.ListDataFrames(mxd):
        if (df.name == 'Crime'):
            layers = mapping.ListLayers(mxd,'Crime Density by School District',df)
            for layer in layers:
                query = '"NAME" = \'Lackland ISD\''
                layer.definitionQuery = query
                df.extent = layer.getExtent()

7. 添加图层到地图文档2.8-39

   import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    df = mapping.ListDataFrames(mxd)[0]
    layer = mapping.Layer(r"C:\ArcpyBook\data\School_Districts.lyr")
    mapping.AddLayer(df,layer,"AUTO_ARRANGE")

8. 插入图层到地图文档2.9-42

   import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    df = mapping.ListDataFrames(mxd, "Crime")[0]
    refLayer = mapping.ListLayers(mxd, "Burglaries*", df)[0]
    insertLayer = mapping.Layer(r"C:\ArcpyBook\data\CityOfSanAntonio.gdb\Crimes2009")
    mapping.InsertLayer(df,refLayer,insertLayer,"BEFORE")

9. 更新图层的符号系统2.10-45

   import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    df = mapping.ListDataFrames(mxd, "Crime")[0]
    updateLayer = mapping.ListLayers(mxd,"Crime Density by School District",df)[0]
    sourceLayer = mapping.Layer(r"C:\ArcpyBook\data\CrimeDensityGradSym.lyr")
    mapping.UpdateLayer(df,updateLayer,sourceLayer,True)

10. 更新图层属性2.11-48

   import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    df = mapping.ListDataFrames(mxd, "Crime")[0]
    updateLayer = mapping.ListLayers(mxd,"Crimes2009",df)[0]
    sourceLayer = mapping.Layer(r"C:\ArcpyBook\data\BurglariesNoForcedEntry.lyr")
    mapping.UpdateLayer(df,updateLayer,sourceLayer,False)

11. 操作数据框中的启用时间的图层2.12-53

   import arcpy.mapping as mapping, os
    mxd = mapping.MapDocument("CURRENT")
    df = mapping.ListDataFrames(mxd, "Crime")[0]
    dft = df.time
    dft.currentTime = dft.startTime
    while dft.currentTime <= dft.endTime:
        fileName = str(dft.currentTime).split(" ")[0] + ".pdf"
        mapping.ExportToPDF(mxd,os.path.join(r"C:\ArcpyBook\Ch2", fileName))
        print("Exported " + fileName)
        dft.currentTime = dft.currentTime + dft.timeStepInterval`

第3章 查找和修复丢失的数据链接

• 查找地图文档和图层文件中丢失的数据源
• 使用MapDocument.findAndReplaceWorkspacePaths()方法修复丢失的数据源
• 使用MapDocument.replaceWorkspaces()方法修复对视的数据源
• 使用replaceDataSource()方法修复单个图层和表对象
• 查找文件夹中所有地图文档内丢失的数据源

---

1. 查找地图文档和图层文件中丢失的数据源3.2-60

   import arcpy.mapping as mapping
    mxd = mapping.MapDocument(r"c:\ArcpyBook\Ch3\Crime_BrokenDataLinks.mxd")
    listBrokenDS = mapping.ListBrokenDataSources(mxd)
    for layer in listBrokenDS:
        print(layer.name)

2. 使用MapDocument.findAndReplaceWorkspacePaths()方法修复丢失的数据源3.3-62

   import arcpy.mapping as mapping
    mxd = mapping.MapDocument(r"c:\ArcpyBook\Ch3\Crime_BrokenDataLinks.mxd")
    mxd.findAndReplaceWorkspacePaths(r"C:\ArcpyBook\Ch3\Data\OldData\CityOfSanAntonio.gdb", r"C:\ArcpyBook\Data\CityOfSanAntonio.gdb")
    mxd.saveACopy(r"C:\ArcpyBook\Ch3\Crime_DataLinksFixed.mxd")

3. 使用MapDocument.replaceWorkspaces()方法修复对视的数据源3.4-65

   `import arcpy.mapping as mapping
    mxd = mapping.MapDocument(r"c:\ArcpyBook\Ch3\Crime_DataLinksFixed.mxd")
    mxd.replaceWorkspaces(r"c:\ArcpyBook\data\CityOfSanAntonio.gdb", "FILEGDB_WORKSPACE",r"c:\ArcpyBook\new_data\CityOfSanAntonio_Personal.mdb","ACCESS_WORKSPACE")
    mxd.saveACopy(r"c:\ArcpyBook\Ch3\Crime_DataLinksUpdated.mxd")

4. 使用replaceDataSource()方法修复单个图层和表对象3.5-68

   import arcpy.mapping as mapping
    mxd = mapping.MapDocument(r"c:\ArcpyBook\Ch3\Crime_DataLinksLayer.mxd")
    df = mapping.ListDataFrames(mxd,"Crime")[0]
    lyr = mapping.ListLayers(mxd,"Burglary",df)[0]
    lyr.replaceDataSource(r"c:\ArcpyBook\data","SHAPEFILE_WORKSPACE","Burglaries_2009")
    mxd.saveACopy(r"c:\ArcpyBook\Ch3\Crime_DataLinksNewLayer.mxd")

5. 查找文件夹中所有地图文档内丢失的数据源3.6-72

   import arcpy.mapping as mapping, os
    f = open('BrokenDataList.txt', 'w')
    for root, dirs, files in os.walk("c:\ArcpyBook"):
        for name in files:
            filename = os.path.join(root, name)
            if ".mxd" in filename:
                mxd = mapping.MapDocument(filename)
                f.write("MXD: " + filename + "\n")
                brknList = mapping.ListBrokenDataSources(mxd)
                for brknItem in brknList:
                    print("Broken data item: " +  brknItem.name + " in " + filename)
                    f.write("\t" + brknItem.name + "\n")
    print("All done")
    f.close()

第4章 自动化地图制图和打印

• 创建布局元素的python列表
• 为布局元素指定唯一的名称
• 使用ListLayoutElements()函数限制返回的布局元素
• 更新布局元素的属性
• 获取可用打印机的列表
• 使用PrintMap()函数打印地图
• 导出地图为PDF文件
• 导出地图为图像文件
• 导出报表
• 使用数据驱动页面和ArcPy制图模块构建地图册
• 将地图文档发布为ArcGIS Server服务

---

1. 创建布局元素的python列表4.2-77

import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    for el in mapping.ListLayoutElements(mxd):
        if el.name != "":
            print el.name`

2. 为布局元素指定唯一的名称4.3-79

   `None`

3. 使用ListLayoutElements()函数限制返回的布局元素4.4-83

import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    for el in mapping.ListLayoutElements(mxd,"LEGEND_ELEMENT","*Crime*"):
        print el.name`

4. 更新布局元素的属性4.5-84

import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    elLeg = mapping.ListLayoutElements(mxd, "LEGEND_ELEMENT","*Crime*")[0]
    elLeg.title = "Crimes by School District"
    for item in elLeg.listLegendItemLayers():
        print item.name`

5. 获取可用打印机的列表4.6-87

import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    for printerName in mapping.ListPrinterNames():
        print printerName`

6. 使用PrintMap()函数打印地图4.7-88

  import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    for df in mapping.ListDataFrames(mxd):
        if df.name == "Test_Performance":
            mapping.PrintMap(mxd,"",df)

7. 导出地图为PDF文件4.8-90

import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    mapping.ExportToPDF(mxd,r"c:\ArcpyBook\Ch4\Map_PageLayout.pdf")

import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    for df in mapping.ListDataFrames(mxd):
        if df.name == "Crime":
            df.referenceScale = df.scale
            mapping.ExportToPDF(mxd,r"c:\ArcpyBook\Ch4\DataFrameCrime.pdf",df)

8. 导出地图为图像文件4.9-92

import arcpy.mapping as mapping
    mxd = mapping.MapDocument("CURRENT")
    for df in mapping.ListDataFrames(mxd):
        if df.name == "Crime":
            mapping.ExportToJPEG(mxd,r"c:\ArcpyBook\Ch4\DataFrameCrime.jpg",df)

9. 导出报表4.10-93

 import arcpy
    import os 
    path = os.getcwd()
     
    #Create PDF and remove if it already exists
    pdfPath = path + r"\CrimeReport.pdf"
    if os.path.exists(pdfPath):
        os.remove(pdfPath)
    pdfDoc = arcpy.mapping.PDFDocumentCreate(pdfPath)
    districtList = ["Harlandale", "East Central", "Edgewood", "Alamo Heights", "South San Antonio", "Southside", "Ft Sam Houston","North East", "Northside", "Lackland", "Southwest", "Judson", "San Antonio"]
    mxd = arcpy.mapping.MapDocument(path + r"\Crime_Ch4.mxd")
    df = arcpy.mapping.ListDataFrames(mxd)[0]
    lyr = arcpy.mapping.ListLayers(mxd, "Crime Density by School District")[0]
    pageCount = 1
    for district in districtList:
        #Generate image for each district
        whereClause = "\"NAME\" = '" + district + " ISD'"
        lyr.definitionQuery = whereClause
        arcpy.SelectLayerByAttribute_management(lyr, "NEW_SELECTION", whereClause)
        df.extent = lyr.getSelectedExtent()
        arcpy.SelectLayerByAttribute_management(lyr, "CLEAR_SELECTION")
        arcpy.mapping.ExportToBMP(mxd, path + "\DistrictPicture.bmp", df) #single file
        #Generate report
        print("Generating report for: " + district + " ISD")
        arcpy.mapping.ExportReport(report_source=lyr,report_layout_file=path + r"\CrimeLayout.rlf",output_file=path + r"\temp" + str(pageCount) + ".pdf", starting_page_number=pageCount)
        #Append pages into final output
        print("Appending page: " + str(pageCount))
        pdfDoc.appendPages(path + r"\temp" + str(pageCount) + ".pdf")
        os.remove(path + r"\temp" + str(pageCount) + ".pdf")
        pageCount = pageCount + 1
    pdfDoc.saveAndClose()
    del mxd`

10. 使用数据驱动页面和ArcPy制图模块构建地图册4.11-98

import arcpy
    import os
    # Create an output directory variable
    outDir = r"C:\ArcpyBook\Ch4"  
    # Create a new, empty pdf document in the specified output directory
    finalpdf_filename = outDir + r"\MapBook.pdf"
    if os.path.exists(finalpdf_filename):
      os.remove(finalpdf_filename)
    finalPdf = arcpy.mapping.PDFDocumentCreate(finalpdf_filename)
    # Add the title page to the pdf
    print("Adding the title page  \n")
    finalPdf.appendPages(outDir + r"\TitlePage.pdf")
    # Add the index map to the pdf
    print "Adding the index page  \n"
    finalPdf.appendPages(outDir + r"\MapIndex.pdf")
    # Export the Data Driven Pages to a temporary pdf and then add it to the
    # final pdf. Alternately, if your Data Driven Pages have already been
    # exported, simply append that document to the final pdf.
    mxdPath = outDir + r"\Topographic.mxd"
    mxd = arcpy.mapping.MapDocument(mxdPath)
    print("Creating the data driven pages \n")
    ddp = mxd.dataDrivenPages
    temp_filename = outDir + r"\tempDDP.pdf"
    if os.path.exists(temp_filename):
      os.remove(temp_filename)
    ddp.exportToPDF(temp_filename, "ALL")
    print("Appending the map series  \n")
    finalPdf.appendPages(temp_filename)
    # Update the properties of the final pdf
    finalPdf.updateDocProperties(pdf_open_view="USE_THUMBS",
                                 pdf_layout="SINGLE_PAGE")
    # Save your result
    finalPdf.saveAndClose()
    # remove the temporary data driven pages file
    if os.path.exists(temp_filename):
        print("Removing the temporary map series file")
        os.remove(temp_filename)
    # Delete variables
    #del finalPdf, mxd, ddp`

11. 将地图文档发布为ArcGIS Server服务4.12-102

 import arcpy.mapping as mapping
    wrkspc = r'c:\ArcpyBook\ch4'
    mxd = mapping.MapDocument(wrkspc + r"\Crime.mxd")
    service = 'Crime'
    sddraft = wrkspc + service + '.sddraft'
    mapping.CreateMapSDDraft(mxd, sddraft, service)
    analysis = mapping.AnalyzeForSD(wrkspc + "Crime.sddraft")
    for key in ('messages', 'warnings', 'errors'):
        print("----" + key.upper() + "----")
        vars = analysis[key]
        for ((message, code), layerlist) in vars.iteritems():
            print "    ", message, " (CODE %i)" % code
            print("     applies to:")
            for layer in layerlist:
                print(layer.name) 

第5章 使用脚本执行地理处理工具

• 查找地理处理工具

• 查看工具箱别名

• 使用脚本执行地理处理工具

• 讲一个工具的输出作为另一个工具的输入

  ---

1. 查找地理处理工具5.2-110

None

2. 查看工具箱别名5.3-114

None

3. 使用脚本执行地理处理工具5.4-116

`import arcpy
in_features = “c:/ArcpyBook/data/CityOfSanAntonio.gdb/Burglary”
clip_features = “c:/ArcpyBook/Ch5/EdgewoodSD.shp”
out_feature_class = “c:/ArcpyBook/Ch5/ClpBurglary.shp”
arcpy.Clip_analysis(in_features,clip_features,out_feature_class)

4. 讲一个工具的输出作为另一个工具的输入5.5-119

import arcpy
    arcpy.env.workspace = "c:/ArcpyBook/data/TravisCounty"
    try:
        # Buffer areas of impact around major roads
        streams = "Streams.shp"
        streamsBuffer = "StreamsBuffer"
        distance = "2640 Feet"
        schools2mile = "Schools.shp"
        schoolsLyrFile = 'Schools2Mile_lyr'
    	
        arcpy.Buffer_analysis(streams, streamsBuffer, distance,'FULL','ROUND','ALL')
        # Make a layer
        arcpy.MakeFeatureLayer_management(schools2mile, schoolsLyrFile) 
        arcpy.SelectLayerByLocation_management(schoolsLyrFile, 'intersect', streamsBuffer)
    except Exception as e:
        print e.message` 

第6章 创建自定义地理处理工具

• 创建自定义地理处理工具

• 创建Python工具箱

---

1. 创建自定义地理处理工具6.2-123

   #Script to Import data to a feature class within a geodatabase
    import arcpy, os
    try:
        outputFC = arcpy.GetParameterAsText(0)
        fClassTemplate = arcpy.GetParameterAsText(1)
        f = open(arcpy.GetParameterAsText(2),'r')
        arcpy.CreateFeatureclass_management(os.path.split(outputFC)[0], os.path.split(outputFC)[1],"point",fClassTemplate)   
        lstFires = f.readlines()
        with arcpy.da.InsertCursor(outputFC) as cur:
            cntr = 1
            for fire in lstFires:
                if 'Latitude' in fire:
                    continue
                vals = fire.split(",")
                latitude = float(vals[0])
                longitude = float(vals[1])
                confid = int(vals[2])
                pnt = arcpy.Point(longitude, latitude)
                feat = cur.newRow()
                feat.shape = pnt
                feat.setValue("CONFIDENCEVALUE", confid)
                cur.insertRow(feat)
                arcpy.AddMessage("Record number" + str(cntr) + "written to feature class")
                cntr = cntr + 1
    except:
        print arcpy.GetMessages()
    finally:
        f.close()

2. 创建Python工具箱6.3-139

import arcpy
    import requests
    import json
    class Toolbox(object):
        def __init__(self):
            """Define the toolbox (the name of the toolbox is the name of the
            .pyt file)."""
            self.label = "Toolbox"
            self.alias = ""
            # List of tool classes associated with this toolbox
            self.tools = [USGSDownload]
    class USGSDownload(object):
        def __init__(self):
            """Define the tool (tool name is the name of the class)."""
            self.label = "USGS Download"
            self.description = "Download from USGS ArcGIS Server instance"
            self.canRunInBackground = False
        def getParameterInfo(self):
            """Define parameter definitions"""
            # First parameter
            param0 = arcpy.Parameter(
                displayName="ArcGIS Server Wildfire URL",
                name="url",
                datatype="GPString",
                parameterType="Required",
                direction="Input")
            param0.value = "http://wildfire.cr.usgs.gov/arcgis/rest/services/geomac_dyn/MapServer/0/query"
            # Second parameter
            param1 = arcpy.Parameter(
                displayName="Output Feature Class",
                name="out_fc",
                datatype="DEFeatureClass",
                parameterType="Required",
                direction="Input")
            params = [param0, param1]
            return params
        def isLicensed(self):
            """Set whether tool is licensed to execute."""
            return True
        def updateParameters(self, parameters):
            """Modify the values and properties of parameters before internal
            validation is performed.  This method is called whenever a parameter
            has been changed."""
            return
        def updateMessages(self, parameters):
            """Modify the messages created by internal validation for each tool
            parameter.  This method is called after internal validation."""
            return
        def execute(self, parameters, messages):
            inFeatures = parameters[0].valueAsText
            outFeatureClass = parameters[1].valueAsText
            agisurl = inFeatures
            payload = { 'where': 'acres > 5','f': 'pjson', 'outFields': 'latitude,longitude,fire_name,acres'}
            r = requests.get(inFeatures, params=payload)
            decoded = json.loads(r.text)
            with arcpy.da.InsertCursor(outFeatureClass, ("SHAPE@XY", "NAME", "ACRES")) as cur:
                cntr = 1
                for rslt in decoded['features']:
                    fireName = rslt['attributes']['fire_name']
                    latitude = rslt['attributes']['latitude']
                    longitude = rslt['attributes']['longitude']
                    acres = rslt['attributes']['acres']
                    cur.insertRow([(longitude,latitude),fireName, acres])
                    arcpy.AddMessage("Record number: " + str(cntr) + " written to feature class")
                    cntr = cntr + 1` 

第7章 查询和选择数据

• 构造正确的属性查询语句
• 创建要素图层和表现层
• 使用Select Layer by Attribute 工具选择要素和行
• 使用Select Layer by Location 工具选择要素
• 结合空间查询和属性选择要素

---

1. 构造正确的属性查询语句7.2-149

None

2. 创建要素图层和表现层7.3-154

import arcpy
    arcpy.env.workspace = "c:/ArcpyBook/data/CityOfSanAntonio.gdb"
    try:
        tView = arcpy.MakeTableView_management("Crime2009Table","Crime2009TView")
    except Exception as e:
        print e.message`

3. 使用Select Layer by Attribute 工具选择要素和行7.4-158

import arcpy
    arcpy.env.workspace = "c:/ArcpyBook/data/CityOfSanAntonio.gdb"
    try:
        qry = '"SVCAREA" = \'North\''
        flayer = arcpy.MakeFeatureLayer_management("Burglary","Burglary_Layer")
        arcpy.SelectLayerByAttribute_management(flayer, "NEW_SELECTION", qry)
        cnt = arcpy.GetCount_management(flayer)
        print "The number of selected records is: " + str(cnt)
    except Exception as e:
        print e.message`

4. 使用Select Layer by Location 工具选择要素7.5-161

import arcpy
    arcpy.env.workspace = "c:/ArcpyBook/data/CityOfSanAntonio.gdb"
    try:
        flayer = arcpy.MakeFeatureLayer_management("Burglary","Burglary_Layer")
        arcpy.SelectLayerByLocation_management(flayer, "COMPLETELY_WITHIN", "c:/ArcpyBook/Ch7/EdgewoodSD.shp")
        cnt = arcpy.GetCount_management(flayer)
        print("The number of selected records is: " + str(cnt))
    except Exception as e:
        print(e.message)
    
   `import arcpy
    arcpy.env.workspace = "c:/ArcpyBook/data/CityOfSanAntonio.gdb"
    try:
        flayer = arcpy.MakeFeatureLayer_management("Burglary","Burglary_Layer")
        arcpy.SelectLayerByLocation_management (flayer, "WITHIN_A_DISTANCE", "c:/ArcpyBook/Ch7/EdgewoodSD.shp","1 MILES")
        cnt = arcpy.GetCount_management(flayer)
        print("The number of selected records is: " + str(cnt))
    except Exception as e:
        print(e.message)
    
   `import arcpy
    arcpy.env.workspace = "c:/ArcpyBook/data/CityOfSanAntonio.gdb"
    try:
        flayer = arcpy.MakeFeatureLayer_management("Burglary","Burglary_Layer")
        arcpy.SelectLayerByLocation_management (flayer, "WITHIN_A_DISTANCE", "c:/ArcpyBook/Ch7/EdgewoodSD.shp","1 MILES")
        arcpy.CopyFeatures_management(flayer, "c:/ArcpyBook/Ch7/EdgewoodBurglaries.shp") 
        ##cnt = arcpy.GetCount_management(flayer)
        ##print "The number of selected records is: " + str(cnt)
    except Exception as e:
        print(e.message)

5. 结合空间查询和属性选择要素7.6-165

import arcpy
    arcpy.env.workspace = "c:/ArcpyBook/data/CityOfSanAntonio.gdb"
    try:
    	qry = '"DOW" = \'Mon\''
    	flayer = arcpy.MakeFeatureLayer_management("Burglary","Burglary_Layer")
    	arcpy.SelectLayerByLocation_management (flayer, "COMPLETELY_WITHIN", "c:/ArcpyBook/Ch7/EdgewoodSD.shp")
    	arcpy.SelectLayerByAttribute_management(flayer, "SUBSET_SELECTION", qry)
    	cnt = arcpy.GetCount_management(flayer)
    	print("The total number of selected records is: " + str(cnt))
    except Exception as e:
    	print(e.message) 

第8章 在要素类和表中使用ArcPy数据访问模块

• 使用SearchCursor检索要素类中的要素
• 使用where字句筛选记录
• 使用几何令爱改进游标性能
• 使用InsertCursor插入行
• 使用UpdateCursor更新行
• 使用UpdateCursor删除行
• 在编辑会话中插入和更新行
• 读取要素类中的几何信息
• 使用Walk()遍历目录

---

1. 使用SearchCursor检索要素类中的要素8.2-171

import arcpy.da
    arcpy.env.workspace = "c:/ArcpyBook/Ch8"
    with arcpy.da.SearchCursor("Schools.shp",("Facility","Name")) as cursor:
        for row in sorted(cursor):
            print("High school name: " + row[1])
```
2.  使用where字句筛选记录8.3-173
```
import arcpy.da
    arcpy.env.workspace = "c:/ArcpyBook/Ch8"
    with arcpy.da.SearchCursor("Schools.shp",("Facility","Name"), '"FACILITY" = \'HIGH SCHOOL\'') as cursor:
            for row in sorted(cursor):
                    print("School name: " + row[1])
```
3.  使用几何令爱改进游标性能8.4-174
```
import arcpy.da
    import time
    arcpy.env.workspace = "c:/ArcpyBook/Ch8"
    start = time.clock()
    with arcpy.da.SearchCursor("coa_parcels.shp",("PY_FULL_OW","SHAPE@XY")) as cursor:
        for row in cursor:
            print("Parcel owner: {0} has a location of: {1}".format(row[0], row[1]))
    elapsed = (time.clock() - start)
    print("Execution time: " + str(elapsed))
```
4.  使用InsertCursor插入行8.5-178

```
import arcpy
    import os
    arcpy.env.workspace = "C:/ArcpyBook/Ch8/WildfireData/WildlandFires.mdb"
    f = open("C:/ArcpyBook/Ch8/WildfireData/NorthAmericaWildfires_2007275.txt","r")
    lstFires = f.readlines()
    try:
            with arcpy.da.InsertCursor("FireIncidents",("SHAPE@XY","CONFIDENCEVALUE")) as cur:
                    cntr = 1
                    for fire in lstFires:
                            if 'Latitude' in fire:
                                    continue
                            vals = fire.split(",")
                            latitude = float(vals[0])
                            longitude = float(vals[1])
                            confid = int(vals[2])
                            rowValue = [(latitude,longitude),confid]
                            cur.insertRow(rowValue)
                            print("Record number " + str(cntr) + " written to feature class")
                            cntr = cntr + 1
    except Exception as e:
            print(e.message)
    finally:
        f.close()
```
5.  使用UpdateCursor更新行8.6-183
```
import arcpy
    arcpy.env.workspace = "C:/ArcpyBook/Ch8/WildfireData/WildlandFires.mdb"
    try:
    	#create a new field to hold the values
    	arcpy.AddField_management("FireIncidents","CONFID_RATING","TEXT","10")
    	print("CONFID_RATING field added to FireIncidents")
    	with arcpy.da.UpdateCursor("FireIncidents",("CONFIDENCEVALUE","CONFID_RATING")) as cursor:
    		cntr = 1
    		for row in cursor:
    			# update the confid_rating field
    			if row[0] <= 40:
    				row[1] = 'POOR'
    			elif row[0] > 40 and row[0] <= 60:
    				row[1] = 'FAIR'
    			elif row[0] > 60 and row[0] <= 85:
    				row[1] = 'GOOD'
    			else:
    				row[1] = 'EXCELLENT'
    			cursor.updateRow(row)
    			print("Record number " + str(cntr) + " updated")
    			cntr = cntr + 1
    except Exception as e:
        print(e.message)
```
6.  使用UpdateCursor删除行8.7-187
    
```
import arcpy
    import os
    arcpy.env.workspace = "C:/ArcpyBook/Ch8/WildfireData/WildlandFires.mdb"
    try:
    	with arcpy.da.UpdateCursor("FireIncidents",("CONFID_RATING"),'[CONFID_RATING] = \'POOR\'') as cursor:
    		cntr = 1
    		for row in cursor:
    			cursor.deleteRow()
    			print("Record number " + str(cntr) + " deleted")
    			cntr = cntr + 1
    except Exception as e:
        print(e.message)
```
7.  在编辑会话中插入和更新行8.8-189

```
import arcpy
    import os
    arcpy.env.workspace = "C:/ArcpyBook/Ch8/WildfireData/WildlandFires.mdb"
    try:
    	edit = arcpy.da.Editor('C:/ArcpyBook/Ch8/WildfireData/WildlandFires.mdb')
    	edit.startEditing(True)
    	with arcpy.da.UpdateCursor("FireIncidents",("CONFIDENCEVALUE","CONFID_RATING")) as cursor:
    		cntr = 1
    		for row in cursor:
    			# update the confid_rating field
    			if row[0] > 40 and row[0] <= 60:
    				row[1] = 'GOOD'
    			elif row[0] > 60 and row[0] <= 85:
    				row[1] = 'BETTER'
    			else:
    				row[1] = 'BEST'
    			cursor.updateRow(row)
    			print("Record number " + str(cntr) + " updated")
    			cntr = cntr + 1
    	edit.stopEditing(True)
    except Exception as e:
        print(e.message)
```
8.  读取要素类中的几何信息8.9-193
    
```
import arcpy
    infc = "c:/ArcpyBook/data/CityOfSanAntonio.gdb/SchoolDistricts"
    # Enter for loop for each feature
    for row in arcpy.da.SearchCursor(infc, ["OID@", "SHAPE@"]):
        # Print the current multipoint's ID
        print("Feature {0}:".format(row[0]))
        partnum = 0
        # Step through each part of the feature
        #
        for part in row[1]:
            # Print the part number
            #
            print("Part {0}:".format(partnum))
            # Step through each vertex in the feature
            #
            for pnt in part:
                if pnt:
                    # Print x,y coordinates of current point
                    #
                    print("{0}, {1}".format(pnt.X, pnt.Y))
                else:
                    # If pnt is None, this represents an interior ring
                    #
                    print("Interior Ring:")
            partnum += 1`
```
9.  使用Walk()遍历目录8.10-195
    
```
import arcpy.da as da
    import os
    print("os walk")
    for dirpath, dirnames, filenames in os.walk(os.getcwd()):
        for filename in filenames:
            print(filename)
    print("arcpy da walk")
    for dirpath, dirnames, filenames in da.Walk(os.getcwd(),datatype="FeatureClass"):
        for filename in filenames:
            print(os.path.join(dirpath, filename)) 
```
## 第9章 获取GIS数据的列表和描述

*   使用ArcPy列表函数
*   获取要素类或表中的字段列表
*   使用Describe()函数返回要素类的描述性信息
*   使用Describe()函数返回栅格图像的描述性信息

***

1.  使用ArcPy列表函数9.2-199
    
```
import arcpy
    arcpy.env.workspace = "C:/ArcpyBook/data/CityOfSanAntonio.gdb"
    fcList = arcpy.ListFeatureClasses()
    for fc in fcList:
        print(fc)
    
   `import arcpy
    arcpy.env.workspace = "C:/ArcpyBook/data/CityOfSanAntonio.gdb"
    fcList = arcpy.ListFeatureClasses("C*")
    for fc in fcList:
        print(fc)
    
   `import arcpy
    arcpy.env.workspace = "C:/ArcpyBook/data/CityOfSanAntonio.gdb"
    fcList = arcpy.ListFeatureClasses("C*","polygon")
    for fc in fcList:
        print(fc)
```
2.  获取要素类或表中的字段列表9.3-202
```
import arcpy
    arcpy.env.workspace = "C:/ArcpyBook/data/CityOfSanAntonio.gdb"
    try:
        fieldList = arcpy.ListFields("Burglary")
        for fld in fieldList:
            print("%s is a type of %s with a length of %i" % (fld.name, fld.type, fld.length))
    except Exception as e:
        print(e.message)
```
3.  使用Describe()函数返回要素类的描述性信息9.4-204
    
```
import arcpy
    arcpy.env.workspace = "c:/ArcpyBook/data/CityOfSanAntonio.gdb"
    try:
        descFC = arcpy.Describe("Burglary")
        print("The shape type is: " + descFC.ShapeType)
        flds = descFC.fields
        for fld in flds:
            print("Field: " + fld.name)
            print("Type: " + fld.type)
            print("Length: " + str(fld.length))
        ext = descFC.extent
        print("XMin: %f" % (ext.XMin))
        print("YMin: %f" % (ext.YMin))
        print("XMax: %f" % (ext.XMax))
        print("YMax: %f" % (ext.YMax))
    except:
        print(arcpy.GetMessages())
```
4.  使用Describe()函数返回栅格图像的描述性信息9.5-208
    
```
import arcpy
    arcpy.env.workspace = "c:/ArcpyBook/data"
    try:
        descRaster = arcpy.Describe("AUSTIN_EAST_NW.sid")
        ext = descRaster.extent
        print("XMin: %f" % (ext.XMin))
        print("YMin: %f" % (ext.YMin))
        print("XMax: %f" % (ext.XMax))
        print("YMax: %f" % (ext.YMax))
    	
        sr = descRaster.SpatialReference
        print(sr.name)
        print(sr.type)
    except Exception as e:
        print e.message` 
```
## 第10章 使用Add-in定制ArcGIS界面

*   下载并安装Python Add-in Wizard
*   创建按钮加载项和使用Python加载项模块
*   安装和测试加载项
*   创建工具加载项

***

1.  下载并安装Python Add-in Wizard10.2-212
    
   `None`
    
2.  创建按钮加载项和使用Python加载项模块10.3-214
    
```
import arcpy
    import pythonaddins
    class ButtonClassImportWildfires(object):
        """Implementation for Wildfire_addin.button (Button)"""
        def __init__(self):
            self.enabled = True
            self.checked = False
        def onClick(self):
            layer_files = pythonaddins.OpenDialog('Select Layers to Add', True, r'C:\ArcpyBook\data\Wildfires', 'Add')
            mxd = arcpy.mapping.MapDocument('current')
            df = pythonaddins.GetSelectedTOCLayerOrDataFrame()
            if not isinstance(df, arcpy.mapping.Layer):
                for layer_file in layer_files:
                    layer = arcpy.mapping.Layer(layer_file)
                    arcpy.mapping.AddLayer(df, layer)
            else:
                pythonaddins.MessageBox('Select a data frame', 'INFO', 0)
```
3.  安装和测试加载项10.4-223
    
   `None`
    
4.  创建工具加载项10.5-228
    
```
import arcpy
    import pythonaddins
    def __init__(self):
      self.enabled = True
      self.cursor = 3
      self.shape = 'Rectangle'
    def onRectangle(self, rectangle_geometry):
        extent = rectangle_geometry
        arcpy.env.workspace = r'c:\ArcpyBook\Ch10'
        if arcpy.Exists('randompts.shp'):
            arcpy.Delete_management('randompts.shp')
            randompts = arcpy.CreateRandomPoints_management(arcpy.env.workspace,'randompts.shp',"",rectangle_geometry)
            arcpy.RefreshActiveView()
        return randompts`
    
```
## 第11章 异常识别和错误处理

*   默认的Python错误消息
*   添加Python异常处理结构(try/except/else)
*   使用GetMessages()函数获取工具消息
*   根据严重性级别筛选工具消息
*   测试和响应特定的错误消息

***

1.  默认的Python错误消息11.2-235
    
```
import arcpy
    arcpy.env.workspace = "c:/ArcpyBook/data"
    arcpy.Buffer_analysis("Streams.shp","Streams_Buff.shp")
```
2.  添加Python异常处理结构(try/except/else)11.3-236
    
```
import arcpy
    try:
        arcpy.env.workspace = "c:/ArcpyBook/data"
        arcpy.Buffer_analysis("Streams.shp","Streams_Buff.shp")
    except:
        print("Error")
```
3.  使用GetMessages()函数获取工具消息11.4-238
    
```
import arcpy
    try:
        arcpy.env.workspace = "c:/ArcpyBook/data"
        arcpy.Buffer_analysis("Streams.shp","Streams_Buff.shp")
    except:
        print(arcpy.GetMessages())
```
4.  根据严重性级别筛选工具消息11.5-240
    
```
import arcpy
    try:
        arcpy.env.workspace = "c:/ArcpyBook/data"
        arcpy.Buffer_analysis("Streams.shp","Streams_Buff.shp")
    except:
        print(arcpy.GetMessages(2))
```
5.  测试和响应特定的错误消息116-241
    
```
import arcpy
    try:
        arcpy.env.workspace = "c:/ArcpyBook/data"
        arcpy.Buffer_analysis("Streams.shp", "Streams_Buff.shp")
    except:
        print("Error found in Buffer tool \n")
        errCode = arcpy.GetReturnCode(3)
        if str(errCode) == "735":
            print("Distance value not provided \n")
            print("Running the buffer again with a default value \n")
            defaultDistance = "100 Feet"
            arcpy.Buffer_analysis("Streams.shp", "Streams_Buff", defaultDistance)
            print("Buffer complete") 
```
## 第12章 使用Python实现ArcGIS的高级功能

*   ArcGIS REST API入门
*   使用Python构建HTTP请求并解析响应
*   使用ArcGIS REST API和Python获取图层信息
*   使用ArcGIS REST API和Python导出地图
*   使用ArcGIS REST API和Python查询地图服务
*   使用ESRI World Geocoding Service镜像地理编码
*   使用FieldMap和FieldMappings
*   使用ValueTable将多值输入到工具中

***

1.  ArcGIS REST API入门12.2-245
    
   `None`
    
2.  使用Python构建HTTP请求并解析响应12.3-250
```
import requests
    import json
    agisurl = "http://server.arcgisonline.com/arcgis/rest/services?f=pjson"
    r = requests.get(agisurl)
    decoded = json.loads(r.text)
    print(decoded)
    #print(r.text)
```
3.  使用ArcGIS REST API和Python获取图层信息12.4-254
```
import requests
    import json
    agisurl = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/1"
    payload = { 'where': 'STATE_FIPS = \'48\' and CNTY_FIPS = \'021\'','returnCountyOnly': 'false', 
                'returnIdsOnly': 'false', 'returnGeometry': 'false',  
                'f': 'pjson'}
    r = requests.get(agisurl, params=payload)
    #r = requests.get(agisurl)
    #print(r.text)
    decoded = json.loads(r.text)
    print("The layer name is: " + decoded['name'])
    print("The xmin: " + str(decoded['extent']['xmin']))
    print("The xmax: " + str(decoded['extent']['xmax']))
    print("The ymin: " + str(decoded['extent']['ymin']))
    print("The ymax: " + str(decoded['extent']['xmax']))
    print("The fields in this layer: ")
    for rslt in decoded['fields']:
        print(rslt['name'])
```
4.  使用ArcGIS REST API和Python导出地图12.5-257
    
```
import requests
    import json
    agisurl = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/export"
    payload = { 'bbox': '-115.8,30.4,-85.5,50.5','size': '800,600', \
                'imageSR': '102004', 'format': 'gif', 'transparent':'false', \
                'f': 'pjson'}
    r = requests.get(agisurl, params=payload)
    print(r.text)
```
5.  使用ArcGIS REST API和Python查询地图服务12.6-260
    
```
import requests
    import json
    agisurl = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/1/query"
    payload = { 'where': 'STATE_FIPS = \'48\' and CNTY_FIPS = \'021\'','returnCountyOnly': 'false',
                'returnIdsOnly': 'false', 'returnGeometry': 'false', 'outFields':'POP2000,POP2007,BLKGRP',
                'f': 'pjson'}
    r = requests.get(agisurl, params=payload)
    #print(r.text)
    decoded = json.loads(r.text)
    #print(decoded)
    for rslt in decoded['features']:
        print("Block Group: " + str(rslt['attributes']['BLKGRP']))
        print("Population 2000: " + str(rslt['attributes']['POP2000']))
        print("Population 2007: " + str(rslt['attributes']['POP2007']))
```
6.  使用ESRI World Geocoding Service镜像地理编码12.7-264
    
```
import requests
    import json
    agisurl = "http://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer/find"
    payload = { 'text': '1202 Sand Wedge, San Antonio, TX, 78258', 'f': 'pjson'}
    r = requests.get(agisurl, params=payload)
    decoded = json.loads(r.text)
    print("The geocoded address: " + decoded['locations'][0]['name'])
    print("The longitude: " + str(decoded['locations'][0]['feature']['geometry']['x']))
    print("The latitude: " + str(decoded['locations'][0]['feature']['geometry']['y']))
    print("The geocode score: " + str(decoded['locations'][0]['feature']['attributes']['Score']))
    print("The address type: " + decoded['locations'][0]['feature']['attributes']['Addr_Type'])
```
7.  使用FieldMap和FieldMappings12.8-266
```
import arcpy
    try:
        # Local variables
        arcpy.env.workspace = r"c:\ArcpyBook\data"
        outFeatureClass = r"c:\ArcpyBook\data\AllTracts.shp"
        # Create a fieldmappings adding the three new fields
        fieldmappings = arcpy.FieldMappings()
        fldmap_STFIPS = arcpy.FieldMap()
        fldmap_COFIPS = arcpy.FieldMap()
        fldmap_TRACT = arcpy.FieldMap()
        # List all feature classes that start with 'County' and type Polygon
        fclss = arcpy.ListFeatureClasses("County*", "Polygon")
        # Create a value table with the FC to merge
        vTab = arcpy.ValueTable()
        for fc in fclss:
            fieldmappings.addTable(fc)
            fldmap_STFIPS.addInputField(fc, "STFID")
            fldmap_COFIPS.addInputField(fc, "STFID")
            fldmap_TRACT.addInputField(fc, "STFID")
            vTab.addRow(fc)
        # Set Starting and ending point from the input as well as the name of the output fields 
        # STFIPS field
        for x in range(0, fldmap_STFIPS.inputFieldCount):
            fldmap_STFIPS.setStartTextPosition(x, 0)
            fldmap_STFIPS.setEndTextPosition(x, 1)
        fld_STFIPS = fldmap_STFIPS.outputField
        fld_STFIPS.name = "STFIPS"
        fldmap_STFIPS.outputField = fld_STFIPS
        # COFIPS field
        for x in range(0, fldmap_COFIPS.inputFieldCount):
            fldmap_COFIPS.setStartTextPosition(x, 2)
            fldmap_COFIPS.setEndTextPosition(x, 4)
        fld_COFIPS = fldmap_COFIPS.outputField
        fld_COFIPS.name = "COFIPS"
        fldmap_COFIPS.outputField = fld_COFIPS
        # TRACT field
        for x in range(0, fldmap_TRACT.inputFieldCount):
            fldmap_TRACT.setStartTextPosition(x, 5)
            fldmap_TRACT.setEndTextPosition(x, 12)
        fld_TRACT = fldmap_TRACT.outputField
        fld_TRACT.name = "TRACT"
        fldmap_TRACT.outputField = fld_TRACT
        # Add fieldmaps into the fieldmappings object
        fieldmappings.addFieldMap(fldmap_STFIPS)
        fieldmappings.addFieldMap(fldmap_COFIPS)
        fieldmappings.addFieldMap(fldmap_TRACT)
        # Run the merge tool
        arcpy.Merge_management(vTab, outFeatureClass, fieldmappings)
        print("Merge completed")
                   
    except Exception as e:
        print(e.message)
```
8.  使用ValueTable将多值输入到工具中12.9-273

```
import arcpy
    try:
        arcpy.env.workspace = r'c:\ArcpyBook\data'
        vTab = arcpy.ValueTable()
        vTab.setRow (0, "5")
        vTab.setRow (1, "10")
        vTab.setRow (2, "20")
        inFeature = 'Hospitals.shp'
        outFeature = 'HospitalMBuff.shp'
        dist = vTab
        bufferUnit = "meters"
        arcpy.MultipleRingBuffer_analysis(inFeature,outFeature,dist,bufferUnit, '', 'ALL')
        print("Multi-Ring Buffer Complete")
    except Exception as e:
        print(e.message) 
```
## 附录A 自动化Python脚本

*   在命令行中运行Python脚本
*   使用sys.argv\[\]捕获命令行的输入
*   添加Python脚本到批处理文件
*   在规定的时间运行批处理文件

***

1.  在命令行中运行Python脚本A.2-283
    
   `None`
    
2.  使用sys.argv\[\]捕获命令行的输入A.3-289
```
import arcpy
    arcpy.env.workspace = "C:/ArcpyBook/data/CityOfSanAntonio.gdb"
    try:
        fieldList = arcpy.ListFields("Burglary")
        for fld in fieldList:
            print "%s is a type of %s with a length of %i" % (fld.name, fld.type, fld.length)
    except Exception as e:
        print(e.message)
    
   `import arcpy
    import sys
    wkspace = sys.argv[1]
    fc = sys.argv[2]
    try:
      arcpy.env.workspace = wkspace
      fields = arcpy.ListFields(fc)
      for fld in fields:
        print(fld.name)
    except Exception as e:
      print(e.message)
``
3.  添加Python脚本到批处理文件A.4-290
    
   `cd c:\ArcpyBook\Appendix1
    python ListFields.py c:\ArcpyBook\data Burglaries_2009.shp`
    
4.  在规定的时间运行批处理文件A.5-292
    
   `None` 

## 附录B GIS程序员不可不知的5个Python功能

*   读取带分隔符的文本文件
*   发送电子邮件
*   检索FTP服务中的文件
*   创建ZIP文件
*   读取XML文件

***

1.  读取带分隔符的文本文件B.2-298
    
```
f = open('c:/ArcpyBook/data/N_America.A2007275.txt','r')
    for fire in f:
        lstValues = fire.split(',')
        latitude = float(lstValues[0])
        longitude = float(lstValues[1])
        confid = int(lstValues[8])
        print("The latitude is: " + str(latitude) + " The longitude is: " + str(longitude) + " The confidence value is: " + str(confid))
    f.close()
```
2.  发送电子邮件B.3-301
```
import smtplib
    from email.MIMEMultipart import MIMEMultipart
    from email.MIMEBase import MIMEBase
    from email.MIMEText import MIMEText
    from email import Encoders
    import os
    gmail_user = ""
    gmail_pwd = ""
    def mail(to, subject, text, attach):
       msg = MIMEMultipart()
       msg['From'] = gmail_user
       msg['To'] = to
       msg['Subject'] = subject
       msg.attach(MIMEText(text))
       part = MIMEBase('application', 'octet-stream')
       part.set_payload(open(attach, 'rb').read())
       Encoders.encode_base64(part)
       part.add_header('Content-Disposition',
               'attachment; filename="%s"' % os.path.basename(attach))
       msg.attach(part)
       mailServer = smtplib.SMTP("smtp.gmail.com", 587)
       mailServer.ehlo()
       mailServer.starttls()
       mailServer.ehlo()
       mailServer.login(gmail_user, gmail_pwd)
       mailServer.sendmail(gmail_user, to, msg.as_string())
       mailServer.close()
    mail("",
       "Hello from python!",
       "This is an email sent with python",
       "bc_pop1996.csv")
```
3.  检索FTP服务中的文件B.4-306

```
import ftplib
    import os
    import socket
    HOST = 'ftp.nifc.gov'
    DIRN = '/Incident_Specific_Data/2012 HISTORIC/ROCKY_MTN/Arapaho/GIS/20120629'
    FILE = '20120629_0600_Arapaho_PIO_0629_8x11_land.pdf'
    try:
        f = ftplib.FTP(HOST)
    except (socket.error, socket.gaierror), e:
        print('ERROR: cannot reach "%s"' % HOST)
    print('*** Connected to host "%s"' % HOST)
    try:
        f.login()
    except ftplib.error_perm:
        print('ERROR: cannot login anonymously')
        f.quit()
    print('*** Logged in as "anonymous"')
    try:
        f.cwd(DIRN)
    except ftplib.error_perm:
        print('ERROR: cannot CD to "%s"' % DIRN)
        f.quit()
    print('*** Changed to "%s" folder' % DIRN)
    try:
        f.retrbinary('RETR %s' % FILE,
              open(FILE, 'wb').write)
    except ftplib.error_perm:
        print('ERROR: cannot read file "%s"' % FILE)
        os.unlink(FILE)
    else:
        print('*** Downloaded "%s" to CWD' % FILE)
    f.quit()
```
4.  创建ZIP文件B.5-310
    
```
   import os
    import zipfile
    #create the zip file
    zfile = zipfile.ZipFile("shapefiles2.zip", "w", zipfile.ZIP_STORED)
    files = os.listdir("c:/ArcpyBook/data")
    for f in files:
        if f.endswith("shp") or f.endswith("dbf") or f.endswith(".shx"):
            zfile.write("C:/ArcpyBook/data/" + f)
    #list files in the archive
    for f in zfile.namelist():
            print("Added %s" % f)
    zfile.close()
    
   
   import os
    import zipfile
    #create the zip file
    zfile = zipfile.ZipFile("shapefiles2.zip", "w", zipfile.ZIP_DEFLATED)
    files = os.listdir("c:/ArcpyBook/data")
    for f in files:
        if f.endswith("shp") or f.endswith("dbf") or f.endswith(".shx"):
            zfile.write("C:/ArcpyBook/data/" + f)
    #list files in the archive
    for f in zfile.namelist():
            print("Added %s" % f)
    zfile.close()
```
5.  读取XML文件B.6-313
    
```
from xml.dom import minidom
    xmldoc = minidom.parse("WitchFireResidenceDestroyed.xml")
    childNodes = xmldoc.childNodes
    eList = childNodes[0].getElementsByTagName("fire")
    for e in eList:
        if e.hasAttribute("address"):
            print e.getAttribute("address")
```