factorielle_recursif.py

def fact(n):
    print("on me demande fact de", n)
    if n == 1:
        print("point d'appui, retournons 1")
        return 1
    else:
        fact_preced = fact(n-1)
        resultat = n * fact_preced
        print("je retourne", n, "fois", fact_preced)
        print("soit", resultat)
        return resultat

print(fact(4))