我正在Python 2.6.5和ArcGIS 10 SP1下尝试使用comtypes和ArcObjects。我使用纯Python方法包装this answer中描述的ArcObjects OLB,但是在comtypes.CoCreateInstance方法中出现错误。

这是我正在运行的代码:

def WrapModules():
    #force wrapping of all ArcObjects libraries (OLBs)
    import os
    import comtypes.client
    # change com_dir to whatever it is for you
    com_dir = r'C:\Program Files\ArcGIS\Desktop10.0\com'
    coms = [os.path.join(com_dir, x) for x in os.listdir(com_dir) if os.path.splitext(x)[1].upper() == '.OLB']
    map(comtypes.client.GetModule, coms)

def GetApp():
    """Get a hook into the current session of ArcMap"""
    from comtypes.gen import esriFramework
    pAppROT = NewObj(esriFramework.AppROT, esriFramework.IAppROT)
    if pAppROT is not None:
        iCount = pAppROT.Count
        if iCount == 0:
            print 'No ArcGIS application currently running.  Terminating ...'
            return None
        for i in range(iCount):
            pApp = pAppROT.Item(i)  #returns IApplication on AppRef
            if pApp.Name == 'ArcMap':
                print "ArcMap found"
                return pApp
        print 'No ArcMap session is running at this time.'
    print "No AppROT found"
    return None

def NewObj(MyClass, MyInterface):
    """Creates a new comtypes POINTER object where\n\
    MyClass is the class to be instantiated,\n\
    MyInterface is the interface to be assigned"""
    from comtypes.client import CreateObject
    import traceback
    try:
        ptr = CreateObject(MyClass, interface=MyInterface)
        return ptr
    except:
        print traceback.format_exc()
        return None

if __name__ == "__main__":
    WrapModules()
    pApp = GetApp()
    if pApp is not None:
        print "HWND: %d" % pApp.hWnd
    else:
        print "No ArcGIS application found!"


这是脚本的输出:

追溯(最近一次通话):
  在NewObj中,文件“ C:\ temp \ ComHelpers.py”,第35行
    ptr = CreateObject(MyClass,interface = MyInterface)
  CreateObject中的文件“ C:\ Python26 \ ArcGIS10.0 \ lib \ site-packages \ comtypes \ client \ __ init__.py”,第235行
    obj = comtypes.CoCreateInstance(clsid,clsctx = clsctx,interface = interface)
  CoCreateInstance中的文件“ C:\ Python26 \ ArcGIS10.0 \ lib \ site-packages \ comtypes \ __ init__.py”,行1145
    _ole32.CoCreateInstance(byref(clsid),punkouter,clsctx,byref(iid),byref(p))
  GetResult中的文件“ _ctypes / callproc.c”,第925行
WindowsError:[错误-2147221231] ClassFactory无法提供请求的类

找不到AppROT
找不到ArcGIS应用程序!

感谢您提供的任何见解!

最佳答案

为了完整起见,this solution由Jason Scheirer在GIS Stack Exchange上发布:


  首先导入arcpy,您无需进行任何许可证签出或按原样设置ArcObjects 10.0运行时,因此找不到CoClass。

09-07 21:32