CheckOutExtension (arcpy)

摘要

Retrieves the license from the License Manager.

脚本检索到扩展模块许可后，即可使用扩展模块工具。脚本使用完扩展模块中的工具后，应使用 CheckInExtension 函数将许可归还给许可管理器，以便其他应用程序使用。当脚本完成时，所有检出的扩展模块许可和设置的产品许可都将归还给许可管理器。

讨论

提示:

只有在独立脚本中才必须设置产品和扩展模块。如果从 Python 窗口运行工具或者使用脚本工具，产品已在应用程序内进行设置，激活的扩展模块取决于“扩展模块”对话框。

语法

CheckOutExtension (extension_code)

参数	说明	数据类型
extension_code	Keyword for the extension product that is being checked. 3D —3D Analyst Schematics —ArcGIS Schematics ArcScan —ArcScan Business —Business Analyst DataInteroperability —Data Interoperability GeoStats —Geostatistical Analyst JTX — Workflow Manager Network —Network Analyst Aeronautical —Esri Aeronautical Solution Defense —Esri Defense Solution Foundation —Esri Production Mapping Datareviewer —ArcGIS Data Reviewer Nautical —Esri Nautical Solution Nauticalb —Esri Bathymetry Spatial —Spatial Analyst StreetMap —StreetMap Tracking —Tracking Licensing and extensions	String

返回值

数据类型	说明
String	There are three possible returned values for CheckOutExtension: NotInitialized —No desktop license has been set. Unavailable —The requested license is unavailable to be set. CheckedOut —The license has been set successfully.

代码实例

CheckOutExtension example

Check out 3D extension for use by tools.

class LicenseError(Exception):
    pass

import arcview
import arcpy
from arcpy import env

try:
    if arcpy.CheckExtension("3D") == "Available":
        arcpy.CheckOutExtension("3D")
    else:
        # raise a custom exception
        #
        raise LicenseError

    env.workspace = "D:/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:
    print arcpy.GetMessages(2)