Listing COM Methods and Elements Using Python (Windows)

Sometimes documentation for a COM Interface is sparse to non-existent. As much as we all like to see in-depth and fully fleshed out documentation, most of the time that isn’t the case. Here is some a simple Python script to list the methods and elements of a Windows COM Object such as Windows Media Player.

This requires:

[Pywin32](https://pypi.org/project/pywin32/)
[Python](http://www.python.org/)

from inspect import getmembers
import win32com.client

def print_members(obj, obj_name="WMPlayer.OCX"):
    """Print members of given COM object"""
    try:
        fields = list(obj._prop_map_get_.keys())
    except AttributeError:
        print("Object has no attribute '_prop_map_get_'")
        print("Check if the initial COM object was created with"
              "'win32com.client.gencache.EnsureDispatch()'")
        raise
    methods = [m[0] for m in getmembers(obj) if (not m[0].startswith("_")
                                                 and "clsid" not in m[0].lower())]

    if len(fields) + len(methods) > 0:
        print("Members of '{}' ({}):".format(obj_name, obj))
    else:
        raise ValueError("Object has no members to print")

    print("\tFields:")
    if fields:
        for field in fields:
            print(f"\t\t{field}")
    else:
        print("\t\tObject has no fields to print")

    print("\tMethods:")
    if methods:
        for method in methods:
            print(f"\t\t{method}")
    else:
        print("\t\tObject has no methods to print")

print_members(win32com.client.gencache.EnsureDispatch("WMPlayer.OCX"))