Omg really? Sweet! What about functions, and functions of functions, etc? Can I specify that the argument to function f should be some other function g which s

Omg really? Sweet! What about functions, and functions of functions, etc? Can I specify that the argument to function f should be some other function g which should receive a list of ints and return a dict of functions with keys that are ints and values that are functions from int to int?