通过Python只能部分访问COM类型库 [英] Only partial access to a COM Type Library through Python

问题描述

我试图写一些脚本来使用一个应用程序附带的COM类型库来控制它外部。

I am attempting to write some scripts to employ a COM type library that came with an application to control it externally.

但是，我被困在我的使用COM的Python库（pythoncom和win32com）：

However, I am stuck in my use of the Python libraries for COM (pythoncom and win32com):

使用COM浏览器，我可以导航找到我想要使用的类型库的GUID。

Using a COM Browser, I am able to navigate to find the GUID for the Type Library I am interested in using.

使用pythoncom，我可以轻松浏览此类型库，查看可用的对象。

Using pythoncom, I am able to easily navigate this type library to see what objects are available available.

>>> import win32com.client
>>> import pythoncom
>>> type_lib_iid = '{12345678-ABCD-EFGH-1234-12341234}'
>>> lib = pythoncom.LoadTypeLib(type_lib_iid, 1, 0)
>>> for index in range(0, lib.GetTypeInfoCount()):
        print lib.GetDocumentation(index)[0]
        print lib.GetTypeInfo(index).GetTypeAttr().iid

这会返回可用COM对象的所有GUID（对不起，如果我正在删除这个词汇表）。

This returns all the GUID's of the available COM objects (sorry if I am butchering this vocabulary).

奇怪的是，当我浏览类型库时，这个调用返回的所有对象都显示在COM浏览器中，只有81个可用的对象可以调用Dispatch。剩余返回：

Strangely, while all the objects that are returned by this call appear in the COM browser when I browse the type library, only 4 of the 81 that are available can I call Dispatch on. The rest return:

'Class not registered.'

我的问题分为两部分：

1）如何通过COM浏览器和通过上面的调用和不可调用使用win32com.client.Dispatch？ [注意：有问题的应用程序正在运行。]

1) How is it possible that objects can be found both through a COM browser and through the above call and not be callable using win32com.client.Dispatch? [Note: the application in question IS running.]

2）我使用错误的函数？ Dispatch是否不正确？我自由地承认，我发现Python COM模块的文档混淆，但我没有发现任何现有的COM对象没有调度，所以我不知道从哪里去。此外，可以发送的4个对象似乎完全按照文档中的说明工作。

2) Am I using the wrong function? Is Dispatch incorrect? I freely admit that I have found the documentation for the Python COM modules confusing, but I have not found any examples where existing COM objects were not Dispatched upon, so I do not know where to go from here. Furthermore, the 4 objects that CAN be dispatched upon seem to work exactly as explained in the documentation.

[最后一个注意：如果我尝试pythoncom.CoCreateInstance（TypeLibCLSID，None ，1，GUIDofInterfaceObject）我得到'接口不支持。我需要使用的关键接口是我在这里的GUID。]

[One last note: if I attempt pythoncom.CoCreateInstance(TypeLibCLSID, None, 1, GUIDofInterfaceObject) I get 'Interface not supported." The critical interface I need to use is the GUID I am trying here.]

推荐答案

只有CoClass接口可以直接使用Dispatch来创建，其他接口通常是通过深入了解顶级对象的属性和方法来创建的，如果你在typelib上运行makepy，生成的包装文件将具有CoClass标有评论。

Only CoClass interfaces can be created directly using Dispatch. The other interfaces are usually created by drilling down through the properties and methods of the top-level objects. If you run makepy on your typelib, the generated wrapper file will have the CoClass's marked with a comment.

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