Question

代码：

            other_users=User.objects.filter(logged_in=False)

            for other_user in other_users:
                other_posts=Post.objects.filter(author=other_user)
                print('[!] Collecting other_posts from other_user => {} [{}] [!]'.format(other_user,other_posts))
                try:
                    for other_post in other_posts:
                        print('[=] other_post: {}'.format(other_post))
                        if other_post.likes==0:
                            print('[=] other_post with 0 likes: {}'.format(other_post))
                            for like in range(max_likes_per_user):
                                rand_post=random.choice(other_posts)
                                print('[+] Random post => {} : TYPE[{}]'.format(rand_post,type(rand_post)))
                                post_index=other_posts.index(rand_post)
                                print('[!] Post index: {}'.format(post_index))
                                other_posts.pop(post_index)
                                print('[+] Liking {} POST'.format(rand_post))
                                rand_post.likes+=1
                                rand_post.save()
                                print('[!] Saving like [!]')
                except Exception as e:
                    print('[-] Error: [-]\n\n'.format(e))
                    done=True

我试图弄清楚过去1小时的问题所在，仍然无法找到。

我试图从列表中获取随机选择的索引，但每当我到达该部分时，程序都会以空错误退出。

部分：

post_index=other_posts.index(rand_post)
print('[!] Post index: {}'.format(post_index))

之后的任何内容都没有返回任何内容，并且直接跳到Exception，但是，e变量总是为空，我没有得到错误输出。

我想知道为什么post_index变量没有获取任何数据，为什么它会跳到Exception部分。代码中看起来有什么坏处？

这些是我得到的输出：

[!] Collecting other_posts from other_user => Robot Tyler 1 [<QuerySet [<Post: Robot Tyler 1 - Title 1>, <Post: Robot Tyler 1 - Title 2>, <Post: Robot Tyler 1 - Title 3>, <Post: Robot Tyler 1 - Title 4>]>] [!]
[=] other_post: Robot Tyler 1 - Title 1
[=] other_post with 0 likes: Robot Tyler 1 - Title 1
[+] Random post => Robot Tyler 1 - Title 4 : TYPE[<class 'person.models.Post'>]
[-] Error: [-]


[!] Collecting other_posts from other_user => Robot Tyler 2 [<QuerySet [<Post: Robot Tyler 2 - Title 1>, <Post: Robot Tyler 2 - Title 2>, <Post: Robot Tyler 2 - Title 3>]>] [!]
[=] other_post: Robot Tyler 2 - Title 1
[=] other_post with 0 likes: Robot Tyler 2 - Title 1
[+] Random post => Robot Tyler 2 - Title 1 : TYPE[<class 'person.models.Post'>]
[-] Error: [-]

任何人都可以告诉我错误在哪里？

Answer 1

出于某种原因，other_posts变量为QuerySet而不是列表。所以我所做的就是将其转换为list(other_posts)。如果有人似乎理解other_posts作为QuerySet处理的原因，请在评论中解释。

这就是代码现在的样子：

other_users=User.objects.filter(logged_in=False)

for other_user in other_users:
    other_posts=Post.objects.filter(author=other_user)
    print('[!] Collecting other_posts from other_user => {} [{}] [!]'.format(other_user,other_posts))
    try:
        for other_post in other_posts:
            print('[=] other_post: {}'.format(other_post))
            if other_post.likes==0:
                print('[=] other_post with 0 likes: {}'.format(other_post))
                for like in range(max_likes_per_user):
                    rand_post=random.choice(other_posts)
                    print('[+] Random post => {} : TYPE[{}]'.format(rand_post,type(rand_post)))
                    post_index=list(other_posts).index(rand_post)
                    print('[!] Post index: {}'.format(post_index))
                    list(other_posts).pop(post_index)
                    print('[+] Liking {} POST'.format(rand_post))
                    rand_post.likes+=1
                    rand_post.save()
                    print('[!] Saving like [!]')
    except Exception as e:
        print(e)
        done=True

Python3获取列表项索引返回空错误

1 个答案: