Discuss / Python / 为什么这么写会出错
Back

为什么这么写会出错

Topic source

雨中的后皇嘉树

#1 Created at ... [Delete] [Delete and Lock User]

filter

def primes():
    yield 2
    it=iter(range(3,200,2))
    while True:
        n = next(it)
        yield n
        it = filter(lambda x: x % n > 0, it)

这样的输出为：

3
5
7
9
11
13
15
17
19
21
23
25
27
29

结果 it 这个迭代器根本就没有被改变

练习

def is_palindrome(n):
    return str(n)==str(n)[::-1]

小太郎tail

#2 Created at ... [Delete] [Delete and Lock User]

同问这样写为什么不对哇，渴望大佬解答

用户6155836822

#3 Created at ... [Delete] [Delete and Lock User]

同问哇

还要我有昵称

#4 Created at ... [Delete] [Delete and Lock User]

同问，想半天没明白

颓废的小痴

#5 Created at ... [Delete] [Delete and Lock User]

return lambda x: x % n > 0

是返回的一个lambda函数啊，怎么会是函数结果呢

你们都是大菠萝

#6 Created at ... [Delete] [Delete and Lock User]

可以看问题:

知乎问题, Stack Overflow

  • 1

Reply