Python 奇怪的词典分配问题

我有两个模型、相册和图片以及一个函数

album\u reorder

，该函数接收图片ID列表并相应地更改权重。这很好，但是我正在尝试为函数编写测试，例如：

Class ReposTests(unittest.TestCase):
    def test_album_reorder__fail__not_owned(self):

        # Create a test user, album and pictures.
        user = self.create_test_user()
        # create_default_album() generates an Album along with 6 default Picture records.    
        create_default_album(user)
        album = get_first_album(user.profile)
        pictures = Picture.objects.filter(album=album)

        # Get all picture IDs into a list and record each pictures existing weight.
        picture_ids = []
        picture_weights = {}
        for picture in pictures:
            picture_ids.append(picture.id)
            print "%s:%s:%s" % (album.id, picture.id, picture.weight)
            picture_weights[picture.id] = picture.weight

        # Create another test user, album and pictures.
        user2 = self.create_test_user()
        create_default_album(user2)
        album2 = get_first_album(user2.profile)
        pictures2 = Picture.objects.filter(album=album2)

        # Add a Picture ID from a different user to test the restriction that an album cannot be re-ordered if any pictures do not belong to the specified user.
        picture_ids.append(pictures2[0].id)
        print "%s:%s:%s" % (album2.id, pictures2[0].id, pictures2[0].weight)
        picture_weights[pictures[2].id] = pictures2[0].weight

        # Shuffle all picture IDs
        random = Random()
        while pictures[0].id == picture_ids[0]:
            random.shuffle(picture_ids)

        # Reorder picture IDs according to shuffled ID list, however this should fail due to the ownership check.
        album_reorder(user, picture_ids)
        print picture_ids
        print picture_weights

        # Check each
        for picture_id in picture_ids:
            self.assertEqual(picture_weights[picture_id], Picture.objects.get(id=picture_id).weight)

现在问题似乎出在

picture\u weights

dict的构造方式上。由于以下两行输出：

# Loop output: (album.id, picture.id, picture.weight)
# 1346:5699:0
# 1346:5700:1
# 1346:5701:2
# 1346:5702:3
# 1346:5703:4
# 1346:5704:5
# 1347:5705:0

print picture_ids
# Outputs: [5700L, 5703L, 5702L, 5699L, 5704L, 5705L, 5701L]

print picture_weights
# Outputs: {5699L: 0L, 5700L: 1L, 5701L: 0L, 5702L: 3L, 5703L: 4L, 5704L: 5L}

请注意，

picture\u id

与预期一样长7个元素，其中as

picture\u权重

仅为6个元素，权重与循环输出的权重不匹配。第二张用户图片

5705

在

picture\u权重中丢失

，但是其中一张

picture\u权重

被分配了不正确的权重

0L

---

我对dict一点经验都没有，但是，我只是想应用我对PHP关联数组的知识，所以我假设我在这方面的知识还有差距。谢谢你的建议

列表和词典在以下几行出现分歧：

    # Add a Picture ID from a different user to test the restriction that an album cannot be re-ordered if any pictures do not belong to the specified user.
    picture_ids.append(pictures2[0].id)
    print "%s:%s:%s" % (album2.id, pictures2[0].id, pictures2[0].weight)
    picture_weights[pictures[2].id] = pictures2[0].weight

注意您是如何使用

图片[2].id

，即

5701L

（这就是特定键在字典中的权重发生变化的原因）。你的意思可能是：

    picture_weights[pictures2[0].id] = pictures2[0].weight

---

列表和词典在以下几行出现分歧：

    # Add a Picture ID from a different user to test the restriction that an album cannot be re-ordered if any pictures do not belong to the specified user.
    picture_ids.append(pictures2[0].id)
    print "%s:%s:%s" % (album2.id, pictures2[0].id, pictures2[0].weight)
    picture_weights[pictures[2].id] = pictures2[0].weight

注意您是如何使用

图片[2].id

，即

5701L

（这就是特定键在字典中的权重发生变化的原因）。你的意思可能是：

    picture_weights[pictures2[0].id] = pictures2[0].weight

---

为什么你有一行

图片权重[pictures[2]。id]=pictures2[0]。权重

而不是

图片权重[pictures2[0]。id]=pictures2[0]。权重

？为什么你有一行

图片权重[pictures[2]。id]=pictures2[0]。权重

而不是

图片权重[pictures2[0]。id]=pictures2[0]。权重

？修复！很抱歉，没有担心，这会发生在我们所有人身上，修正了！对不起，勃鲁什不担心，这件事发生在我们所有人身上。