python-3.x - 尝试将从列表中解包的字典传递给 __init__ 方法时出现 TyperError

Question

我正在尝试从列表中解压缩 dict 并将其传递给类的 __init__ 方法。但是某处有一个 TypeError，我无法解决。我只传递一个长度为 13 的字典（检查 type() 和 len() 输出）。

Python 3.7.2，Windows 10。

packed:
[{
    'external_ids': {},
    'play_offset_ms': 9340,
    'genres': [{'name': 'Alternative'}],
    'external_metadata': {},
    'label': 'Vagrant Records',
    'release_date': '2018-10-11',
    'artists': [{'name': 'LP'}],
    'title': 'Recovery',
    'duration_ms': 234620,
    'album': {'name': 'Recovery'},
    'acrid': '12655602970c4b9fecd46fd946f2b3d8',
    'result_from': 3,
    'score': 100
}]

        ...
        if not status:
            packed = meta['metadata']['music']
            self.meta = Meta(*packed)
            print(*packed, type(*packed), len(*packed))
        else:
            print(error_codes[status])

class Meta:
    def __init__(self, meta):
        pass

Output:
{'external_ids': {}, 'play_offset_ms': 9340, 'genres': [{'name': 'Alternative'}], 'external_metadata': {}, 'label': 'Vagrant Records', 'release_date': '2018-10-11', 'artists': [{'name': 'LP'}], 'title': 'Recovery', 'duration_ms': 234620, 'album': {'name': 'Recovery'}, 'acrid': '12655602970c4b9fecd46fd946f2b3d8', 'result_from': 3, 'score': 100} <class 'dict'> 13
Traceback (most recent call last):
  File "C:/Users/Ledor/Documents/PycharmProjects/Tbot/objects.py", line 215, in <module>
    a1.recognize()
  File "C:/Users/Ledor/Documents/PycharmProjects/Tbot/objects.py", line 109, in recognize
    self.meta = Meta(*packed)
TypeError: __init__() takes 2 positional arguments but 6 were given

标签： python-3.xinit