I had the same thought. There was surprisingly little discussion of how this new language relates to Python - the only mention on the whole page is that need Python installed to use it. At pyflang.com it says that "PyFL = Python based Functional Language".

I'd be curious to know: Does PyFL benefit from Python's libraries, in the way that Scala and Clojure can use Java libraries? Are there any syntactic similarities? Or does it just happen to be built on Python as an implementation detail?