“Números largos de armstrong” Código de respuesta

Números largos de armstrong

while True:
    n = input()
    n1 = [int(d) for d in str(n)]
    a = []
    ans = 0
    for i in n1:
      a.append(i**len(n))
    for j in a:
      ans += int(j)
    if ans == int(n):
      print('This number is an armstrong number')
    elif ans != int(j):
      print("this number is not a armstrong number")
    if n == 'stop' or ans == "Stop":
      break