python code to select from a dropdown list using option value

I need a Python script that can select an item from an ASP.NET Web Forms dropdown list by value ID. The dropdown is part of a broader ASP.NET Web Forms project. When an item is selected from the dropdown, it should trigger an update on the page.

Ideal Skills:
- Proficient in Python with experience in ASP.NET
- Familiarity with Web Forms and dropdown list manipulation
- Understanding of page update triggers in ASP.NET

Please provide examples of similar projects you've completed.