CheckExtension

Résumé

Checks to see if a license is available to be checked out for a specific type of extension.

Once the extension license has been retrieved by the script, tools using that extension can be used. Once a script is finished with an extension's tools, the CheckInExtension function should be used to return the license to the License Manager so other applications can use it. All checked-out extension licenses and set product licenses are returned to the License Manager when a script completes.

Learn more about licensing and extensions

Syntaxe

CheckExtension (extension_code)

Paramètre	Explication	Type de données
extension_code	Keyword for the extension product that is being checked. 3D —ArcGIS 3D Analyst DataReviewer —ArcGIS Data Reviewer for Desktop DataInteroperability —ArcGIS Data Interoperability 10.5.1 for Desktop Airports —ArcGIS for Aviation: Airports Aeronautical —ArcGIS for Aviation: Charting Bathymetry —ArcGIS for Maritime: Bathymetry Nautical —ArcGIS for Maritime: Charting LocationReferencing —ArcGIS Pipeline Referencing GeoStats —ArcGIS Geostatistical Analyst Network —ArcGIS Network Analyst Spatial —ArcGIS Spatial Analyst Schematics —ArcGIS Schematics Tracking —ArcGIS Tracking Analyst JTX —ArcGIS Workflow Manager for Desktop ArcScan —ArcScan Business —Esri Business Analyst Defense —Esri Defense Solution Foundation —Esri Production Mapping Highways —Esri Roads and Highways StreetMap —StreetMap Premium for ArcGIS	String

Valeur renvoyée

Type de données	Explication
String	There are four possible returned values for CheckExtension: Available —The requested license is available to be set. Unavailable —The requested license is unavailable to be set. NotLicensed —The requested license is not valid. Failed —A system failure occurred during request.

Exemple de code

CheckExtension example

Check for availability of ArcGIS 3D Analyst before checking it out.

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))