3章代码

1.获得环境变量

#coding=utf8
import arcpy

import os
import sys
import math
import string
def Main():
    environments = arcpy.ListEnvironments()
    # Sort the environment list, disregarding capitalization
    #
    environments.sort(key=string.lower)

    for environment in environments:
        # As the environment is passed as a variable, use Python's getattr
        #   to evaluate the environment's value
        #
        envSetting = getattr(arcpy.env, environment)

        # Format and print each environment and its current setting
        #
        arcpy.AddMessage( "{0:<30}: {1}".format(environment, envSetting))
    for toolbox in arcpy.ListToolboxes():
        # Toolboxes are printed in the form of "toolbox_name(toolbox_alias)"
        arcpy.AddMessage(toolbox)


arcpy.env.overwriteOutput=True
arcpy.env.addOutputsToMap=True
arcpy.AddMessage("arcpy.env.scratchGDB="+arcpy.env.scratchGDB)
arcpy.env.workspace = arcpy.env.scratchWorkspace #默认数据库


arcpy.ResetEnvironments()

# Reset a specific environment setting
arcpy.ClearEnvironment("workspace")

Main()

2.设置环境变量

def Main():
    arcpy.env.overwriteOutput=True
    arcpy.env.addOutputsToMap=True
    arcpy.AddMessage("arcpy.env.scratchGDB="+arcpy.env.scratchGDB)
    arcpy.env.workspace = arcpy.env.scratchWorkspace #默认数据库


    arcpy.ResetEnvironments()

    # Reset a specific environment setting
    arcpy.ClearEnvironment("workspace")




Main()
=======================3D转2D

#coding=utf8
import arcpy

import os
import sys
import math



def Main():
    arcpy.env.overwriteOutput=True
    arcpy.env.addOutputsToMap=True
    arcpy.env.outputZFlag ="Disabled"
    arcpy.env.tinSaveVersion = "PRE_10.0" #CURRENT


    indata=arcpy.GetParameterAsText(0)
    outdata=arcpy.GetParameterAsText(1)

    arcpy.CopyFeatures_management(indata,outdata)
    #arcpy.Select_analysis(indata,outdata)

    arcpy.ResetEnvironments()

    # Reset a specific environment setting
    arcpy.ClearEnvironment("workspace")




Main()

输出tin，10.0版本的tin

def Main():
    arcpy.env.overwriteOutput=True
    arcpy.env.addOutputsToMap=True
    arcpy.env.outputZFlag ="Disabled"
    arcpy.env.tinSaveVersion = "PRE_10.0" #CURRENT
    arcpy.CheckOutExtension('3D')


    indata=arcpy.GetParameterAsText(0)
    outdata=arcpy.GetParameterAsText(1)

    arcpy.CreateTin_3d(outdata,spatial_reference="#",in_features=indata+" 标示高程 Hard_Line <None>",constrained_delaunay="DELAUNAY")

    arcpy.ResetEnvironments()

    # Reset a specific environment setting
    arcpy.ClearEnvironment("workspace")




Main()

3.许可和软件安装信息

def Main():
    arcpy.AddMessage("ProductInfo:"+arcpy.ProductInfo())
    arcpy.AddMessage("{0:<30}: {1}".format("ArcInfo", arcpy.CheckProduct("ArcInfo")))
    arcpy.AddMessage("{0:<30}: {1}".format("arcview", arcpy.CheckProduct("arcview")))
    arcpy.AddMessage("{0:<30}: {1}".format("arceditor",arcpy.CheckProduct("arceditor")))
    arcpy.AddMessage("{0:<30}: {1}".format("engine",arcpy.CheckProduct("engine")))
    arcpy.AddMessage("{0:<30}: {1}".format("enginegeodb",arcpy.CheckProduct("enginegeodb")))
    arcpy.AddMessage("{0:<30}: {1}".format("arcserver",arcpy.CheckProduct("arcserver")))
    if arcpy.CheckExtension("3D") == "Available":
        arcpy.CheckOutExtension("3D")
        arcpy.CheckInExtension("3D")
        arcpy.AddMessage("有3D")
    else:
        arcpy.AddMessage("没有3D:")

    for install in arcpy.ListInstallations():
        arcpy.AddMessage("install:"+install)

    d = arcpy.GetInstallInfo()
    for key, value in d.iteritems():
        # Print a formatted string of the install key and its value
        #
        arcpy.AddMessage("{:<13} : {}".format(key, value))
    arcpy.AddMessage(u"安装版本"+arcpy.GetInstallInfo()['Version'])
    arcpy.AddMessage(u"安装路径"+arcpy.GetInstallInfo()['InstallDir'])


    ##3D —ArcGIS 3D Analyst 扩展模块
    ##Datareviewer —ArcGIS 10.2 Data Reviewer for Desktop
    ##DataInteroperability —适用于 Desktop 的 ArcGIS Data Interoperability 扩展模块
    ##Airports —ArcGIS for Aviation: Airports
    ##Aeronautical —ArcGIS for Aviation: Charting
    ##Bathymetry —ArcGIS for Maritime: Bathymetry
    ##Nautical —ArcGIS for Maritime: Charting
    ##GeoStats —ArcGIS Geostatistical Analyst 扩展模块
    ##Network —ArcGIS Network Analyst 扩展模块
    ##Spatial —ArcGIS Spatial Analyst 扩展模块
    ##Schematics —ArcGIS Schematics 扩展模块
    ##Tracking —ArcGIS Tracking Analyst 扩展模块
    ##JTX —ArcGIS Workflow Manager for Desktop
    ##ArcScan —ArcScan
    ##Business —Business Analyst
    ##Defense —Esri Defense Solution
    ##Foundation —Esri Production Mapping
    ##Highways —Esri Roads and Highways
    ##StreetMap —StreetMap
Main()

4.表名和字段是否有效

#coding=utf8
import arcpy

import os
import sys
import math
from arcpy.sa import *




def Main():
    arcpy.env.overwriteOutput=True
    arcpy.env.addOutputsToMap=True


    inworkspace=arcpy.GetParameterAsText(0)
    tablename=arcpy.GetParameterAsText(1)
    fieldname=arcpy.GetParameterAsText(2)
    arcpy.env.workspace = inworkspace
    if arcpy.Exists(tablename):#测试在执行期间当前工作空间中是否存在要素类、
        #表、数据集、shapefile、工作空间、图层和其他文件。函数返回指示元素是否存在的布尔值。
        arcpy.AddMessage(tablename+u"已存在")
        return

    tablename1 = arcpy.ValidateTableName(tablename,inworkspace)
    arcpy.AddMessage(tablename+u",修改为"+tablename1)
    arcpy.CreateTable_management(inworkspace, tablename1)
    #字段是否有效
    fieldname1 = arcpy.ValidateFieldName(fieldname, inworkspace)
    arcpy.AddMessage(fieldname+u",修改为"+fieldname1)

    arcpy.AddField_management(tablename1, fieldname1, "double")
    data_type="Table"

    arcpy.Delete_management(inworkspace+os.sep+tablename1,data_type)


Main()

5.信息输出和编写消息

#coding=utf8
import arcpy

import os
import sys
import math
import string




def Main():
    fc = arcpy.GetParameterAsText(0)
    arcpy.GetCount_management(fc)
    # Print the first and last geoprocessing tool messages
    message_count = arcpy.GetMessageCount()
    for i in range(message_count):
        arcpy.AddMessage("{0},{1}".format(i,arcpy.GetMessage(i)))
    feature_count = int(arcpy.GetCount_management(fc).getOutput(0))
    if feature_count == 0:
        arcpy.AddError("{0} has no features.".format(fc))
    else:
        arcpy.AddMessage("{0} has {1} features.".format(fc, feature_count))

    arcpy.AddWarning("{0} has {1} features.".format(fc, feature_count))



Main()

8.异常处理

# -*- coding:UTF-8 -*-
import arcpy
import os
import sys


try:
    a=1111111
    b=0000
    c=a/b
except Exception as e:
    arcpy.AddError(e)
    arcpy.AddMessage(e.message)


finally:
        #'''不管try语句中的代码是否报错,都会执行finally分支中的代码'''
        #'''去完成一些连接操作的收尾工作'''
    arcpy.AddMessage('finally 被执行了')
arcpy.AddMessage("***：{0}".format(arcpy.GetReturnCode(0)))
num = arcpy.GetMessageCount()
arcpy.AddWarning("{0} AddWarning".format(num))

num = arcpy.GetMessageCount()
for i in range(num):
    arcpy.AddMessage("{0}==========={1}".format(i,arcpy.GetMessage(i)))
    arcpy.AddReturnMessage(i)