I think you are conflating Guido's attitude to FP with Python too much here. All the FP primitives in Python were championed by other people. In your linked blog post, Guido is talking about purely functional languages and how Python, like Lisp, is not like that. Which is true but doesn't make Python bad for (or "hostile" to) writing functional code.
In fact Python taught a generation of programmers to love functional code, because of the big speedup available from stringing together C-native builtins with higher order functions.
There is "not purely functional", and then there is python. Python does more to discourage FP than other "not purely functional" languages. Guido may no longer be python's BDFL, but it's clear that during his tenure he had little interest in making python better FP. He accepted contributions (like the addition of lambda) from other people, but never did anything to champion FP in python and it really shows.
Do you feel Python discourages FP more than eg C++, or JavaScript? I'd call Python more functional than either of those, and a little less functional than Common Lisp.
In fact Python taught a generation of programmers to love functional code, because of the big speedup available from stringing together C-native builtins with higher order functions.