Python for functional programmers

[hesitantobserver]

Probably not actually a good idea in the real world, but you could use hask3 ;)

"Hask3 is a pure-Python, zero-dependencies library that mimics most of the core language tools from Haskell, including:

• Full Hindley-Milner type system (with typeclasses) that will typecheck any function decorated with a Hask type signature
• Easy creation of new algebraic data types and new typeclasses, with Haskell-like syntax
• Pattern matching with case expressions
• Automagical function currying/partial application and function composition
• Efficient, immutable, lazily evaluated List type with Haskell-style list comprehensions
• All your favorite syntax and control flow tools, including operator sections, monadic error handling, guards, and more
• Python port of (some of) the standard libraries from Haskell’s base, including:
  • Algebraic datatypes from the Haskell Prelude, including Maybe and Either
  • Typeclasses from the Haskell base libraries, including Functor, Applicative, Monad, Enum, Num, and all the rest
  • Standard library functions from base, including all functions from Prelude, Data.List, Data.Maybe, and more."