廖雪峰Python练习题

# -*- coding: utf-8 -*-
# @Time :2018/6/27
# @Author :ShiChao
# title :1、筛选素数；2、筛选回文

# 输出素数：
'''def _odd_iter(): #列出所有的奇数 n = 1 while True: n += 2 yield n def not_sushu(): return lambda x:x % n > 0 def primes(): yield 2 it = _odd_iter() while True: n = next(it) yield n it = filter(not_sushu(),it) for n in primes(): if n < 100: print(n) else: break'''

# 筛选回文
def is_palindrome(n):
    temp1 = str(n)
    if temp1 == temp1[::-1]:
        return n
    else:
        return False
# 其实两行代码就可以搞定
def is_palindrome(n):
    temp1 = str(n)
    return temp1 == temp1[::-1]
output = filter(is_palindrome, range(1, 100))
print('1~100:', list(output))