Abstract: Microsoft is integrating Python into Excel, and it may finally replace VBA. This is big for finance professionals and other Excel users. We look at ways of using Python in Excel and the capabilities this unlocks. Additionally, we'll look at how Python developers can leverage Excel for testing or as a simple UI. Bio: Daniel Roos, with 15+ years of experience building Python/C++ financial systems for global banks and hedge funds. He has recently co-founded Njorda, a retail-focused fintech based in Stockholm.