在Python中使用ArcObjects（來自Mark Cederholm UniSource Energy Services ）

Why Python?

• ArcGIS VBA support ends after 10.0
• At 10.0,ArcMap and ArcCatalolg include an integrated Python shell
• Python scripting objects provided by ESRI
• IDLE is a decent development and debugging environment
• Python scripts can use ArcObjects!

Geoprocessing objects

• Ready-to-use geoprocessing objects are available for Python throuth arcgisscripting(9.3) and arcpy(10.0)
• At 9.3: additional functionality includes data access objects such as cursors
• At 10.0:additional functionality includes some map document automation
• Nonetheless, a greate deal of functionality is only available throuth ArcObjects

COM interop:relative speed test

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The comtypes package

• Available for download at:http://sourceforge.net/projects/comtypes/(comtypes is a pure Python, lightweight COM client and server framework, based on the ctypes Python FFI package.)
• See also this link for documentation:http://starship.python.net/crew/theller/comtypes/

Loading and importing modules

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Creating and casting objects

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Demo:Maniplating and existing ArcMap or ArcCatalog session

Retrieving an existing session from outside the application boundary

Getting a selected feature

Creating session objects with IObjectFactor

TIP:At 10.0 ,you can run a script within the session's python shell and create ojbects normally;use AppRef to get he App handle