将三位数看成由三个数组成，并判断其各位数字立方和是否等于该数本身:

#!/usr/bin/python
# -*- coding: UTF-8 -*-

for x in range(1,10):
    for y in range(0,10):
        for z in range(0,10):
            s1=x*100+y*10+z
            s2=pow(x,3)+pow(y,3)+pow(z,3)
            if s1==s2:
                print "水仙花数有：%7ld" %(s1)

水仙花数及其个数

#!/usr/bin/env python
# -*- coding: UTF-8 -*-

L = []
for n in range(100,1000):
    i = n / 100
    j = n /10 % 10
    k = n % 10
    if n == i ** 3 + j ** 3 + k ** 3:
        if n == pow(i,3) + pow(j,3) +pow(k,3):
            L.append(n)
print(L)
print len(L)

参考方法：

#!/usr/bin/env python
# -*- coding: UTF-8 -*-

a = 1
b = 1
c = 1
for a in range(0,10):
    for b in range(0,10):
        for c in range(0,10):
            if int(a)**3+int(b)**3+int(c)**3 == a*100+b*10+c and a != 0:
                x = a*100+b*10+c
                print(x)

参考方法：

#!/usr/bin/python
# -*- coding: UTF-8 -*-

#列表解析法
l=[x**3+y**3+z**3 for x in range(0,10) for y in range(0,10) for z in range(0,10) if (str(x)+str(y)+str(z))==str(x**3+y**3+z**3)]
print(l)

列表生成式：

#coding:UTF-8

print [i for i in range(100,1000) if (i/100)**3+((i-i/100*100)/10)**3+(i%10)**3 == i]