Python Scheme code to python (Von Neumann Natural Numbers)

[Python] Scheme code to python (Von Neumann Natural Numbers) - Printable Version

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Scheme code to python (Von Neumann Natural Numbers) - simmer - Feb 18, 2022

Hi guys!

I have this code in scheme:

Code 
(define von-neumann

  (lambda (n)

    (if (zero? n)

        '()

        (let ((n-1 (von-neumann (- n 1))))

          (append n-1 (list n-1))))))

1 ]=> (for-each

 (lambda (n)

  (newline)

  (display n)

  (display (length n)))

 (map von-neumann (iota 5 0 1)))

()0

(())1

(() (()))2

(() (()) (() (())))3

(() (()) (() (())) (() (()) (() (()))))4

;Unspecified return value

That I would like to see in python

Help out?

Thanks,
Oliver