They mostly took inspiration from other languages for UV. Cargo (Rust) was a huge inspiration, but they got stuff from Ruby as well, I believe. There was an episode on "the changelog" about it. Don't remember them saying anything about PEPs, although that might just be me not having listened to the entire thing. However, the Charlie Marsh was extremely insistent on the advantages of being a polyglot and hiring people with diverse programming experiences. So I think it's quite safe to assume that played a bigger role than just PEPs.