Is there a tool for exploring/testing COM objects?

I'm trying to automate a process by using a COM object from Python (win32com), but I'm not getting the expected results... Is there a tool to explore/test COM objects without having to write a specific program? I mean, is there something that allows e.g. to instantiate a COM object and call its methods?

(Basically I'm trying to find out if my unexpected results are win32com's fault, and I'd like to avoid installing Visual Studio to write a C# app)