ArcObjects and Python

arcobjects_python.py

def AppendPaths(paths):
    """Append all the paths with DLLs to be used by the script to the Python Path"""
    import sys
    for p in paths:
        sys.path.append(p)

def AddReferences(refs):
    """Add references to the required DLLs"""
    import clr
    for r in refs:
        clr.AddReference(r)

        
def Init():
    """
    Initialise ArcObjects and licensing
    """
    from ESRI.ArcGIS.esriSystem import AoInitializeClass, esriLicenseProductCode 
    init = AoInitializeClass()
    init.Initialize(esriLicenseProductCode.esriLicenseProductCodeArcView)
  
def CreateApplication():
    """Open and instance of ArcMap""" 
    from ESRI.ArcGIS.ArcMapUI import MxDocumentClass
    doc = MxDocumentClass()
    app = doc.Parent
    app.Visible = True
    return app

def ListNetworks():
    """
    List geometric networks in a geodatabase using methods written in 
    a custom VB.NET / ArcObjects DLL
    """
    from MyArcObjectsDLL import NetworkGeodatabase
    print dir(NetworkGeodatabase)
    dbpath = r"D:\Data\Databases\network_geodatabase.mdb"
    gdb = NetworkGDB(dbpath) #create a new instance of custom class
    networks = gdb.ListNetworks()    
    for n in networks:
        print n
   
paths = [r"C:\Python27\Lib\pythonnet-2.0-alpha2-clr2.0_131_py27_UCS2", 
         r"C:\Program Files\ArcGIS\DeveloperKit10.0\DotNet", 
         r"D:\Projects\Sourcecode\MyArcObjectsDLL\bin\Debug"]

AppendPaths(paths)
AddReferences(["MyArcObjectsDLL","ESRI.ArcGIS.System"])
Init()
CreateApplication()
ListNetworks()