python 水仙花

#简单
def narcissus():
   for n in range(100, 1000, 1):
      a, b, c = n//100, (n//10)%10, (n%100)%10
      if a ** 3 + b ** 3 + c ** 3 == n:
         print(n)

#使用yield写法
def narcissus_yield():
   m, n = 100, 999
   while m <= n:
      a, b, c = m // 100, (m // 10) % 10, (m % 100) % 10
      if a ** 3 + b ** 3 + c ** 3 == m:
         yield m
      m = m + 1

#包含水仙花等。。。
def narcissus_all(min, max):
   if type(min) != int or type(max) != int:
      msg = "参数类型必须为int"
      raise TypeError(msg)
   if min is None or max is None:
      msg = "参数值不能为None!!!"
      raise ValueError(msg)
   if max == 0 or max < min:
      msg = "max不能为0或者max必须比min值大"
      raise ValueError(msg)
   length = len(str(max))
   while min <= max:
      temp_val, sum = min, 0
      for n in range(length):
         sum += (temp_val%10) ** length
         temp_val //= 10
      if min == sum:
         yield min
      min = min + 1

for n in narcissus_all(100000, 999999):
   print(n)