CheckExtension

摘要

核查是否存在可为特定类型的扩展模块检出的许可。

了解关于许可和扩展模块的详细信息

语法

CheckExtension (extension_code)

参数	说明	数据类型
extension_code	正进行检查的扩展模块产品的关键字。 3D—ArcGIS 3D Analyst extension Aeronautical—ArcGIS Aviation Charting Airports—ArcGIS Aviation Airports ArcScan—ArcScan Bathymetry—ArcGIS Bathymetry BusinessPrem—ArcGIS Business Analyst DataReviewer—ArcGIS Data Reviewer DataInteroperability—ArcGIS Data Interoperability extension for Desktop Defense—ArcGIS Defense Mapping Foundation—ArcGIS Production Mapping GeoStats—ArcGIS Geostatistical Analyst 扩展模块 Indoors—ArcGIS Indoors ImageAnalyst—Image Analyst JTX—ArcGIS Workflow Manager (Classic) Desktop LocationReferencing—ArcGIS Pipeline Referencing or ArcGIS Roads and Highways LocateXT—LocateXT Nautical—ArcGIS Maritime Network—ArcGIS Network Analyst 扩展模块 Publisher—ArcGIS Publisher Schematics—ArcGIS Schematics 扩展模块 SMPAsiaPacific—StreetMap Premium Asia Pacific SMPEurope—StreetMap Premium Europe SMPJapan—StreetMap Premium Japan SMPLatinAmerica—StreetMap Premium Latin America SMPMiddleEastAfrica—StreetMap Premium Middle East Africa SMPNorthAmerica—StreetMap Premium North America Spatial—ArcGIS Spatial Analyst 扩展模块 Tracking—ArcGIS Tracking Analyst 扩展模块	String

返回值

数据类型	说明
String	CheckExtension 可能会返回以下四个值： Available—申请的许可存在，可以设置。 Unavailable—申请的许可不存在，无法设置。 NotLicensed—申请的许可无效。 Failed—请求期间发生系统失败。

代码示例

CheckExtension 示例

检出前，请检查 ArcGIS 3D Analyst extension 的可用性。

import arcpy
class LicenseError(Exception):
    pass
try:
    if arcpy.CheckExtension("3D") == "Available":
        arcpy.CheckOutExtension("3D")
    else:
        # raise a custom exception
        raise LicenseError
    arcpy.env.workspace = "c:/GrosMorne"
    arcpy.HillShade_3d("WesternBrook", "wbrook_hill", 300)
    arcpy.Aspect_3d("WesternBrook", "wbrook_aspect")
    arcpy.CheckInExtension("3D")
except LicenseError:
    print("3D Analyst license is unavailable")
except arcpy.ExecuteError:
    print(arcpy.GetMessages(2))