How to deal with duplicates in OutLook Global Address list with Win32Com (Python)

Question

I'm trying to create a Python script that searches for entries in a GAL (Global Address List) to be processed. However, there are contacts in the GAL that have the exact same name as others, and I can't find a way to detect duplicates without looping through the GAL. I don't want to loop through the GAL, as it is very large and would take a long time. I did try using methods like .Item("name" or index) or .GetNext(), etc. Any help would be appreciated!