Python Recursion: Range

Question

I need to define a function called rec_range(n) which takes a natural number and returns a TUPLE of numbers up to the number n.

i.e. rec_range(5) returns (0,1,2,3,4)

Answer 1

Just keep concatenating tuples for the number that is one less until one is reached:

rec_range = lambda n: rec_range(n - 1) + (n - 1,) if n > 0 else ()