棉花糖NewType不能转化为数据集，python3.10

Question

我正在升级到python 3.10，在这种情况下，我认为最好也升级使用的包。现在，问题在于棉花糖包，此时我甚至无法运行它们的NewType示例代码。

这是我的代码(摘自NewType定义中的注释)：

from marshmallow_dataclass import NewType, dataclass, List
import marshmallow.validate
IPv4 = NewType('IPv4', str, validate=marshmallow.validate.Regexp(r'^([0-9]{1,3}\\.){3}[0-9]{1,3}$'))

@dataclass
class MyIps:
   ips: List[IPv4]

MyIps.Schema().load({"ips": ["0.0.0.0", "grumble grumble"]})

我只添加了第一行，以获得必要的命令。

当我运行它时，我会收到以下错误消息：

/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/__init__.py:373: UserWarning: ****** WARNING ****** marshmallow_dataclass was called on the class <function NewType.<locals>.new_type at 0x7fb5a077fd90>, which is not a dataclass. It is going to try and convert the class into a dataclass, which may have undesirable side effects. To avoid this message, make sure all your classes and all the classes of their fields are either explicitly supported by marshmallow_dataclass, or define the schema explicitly using field(metadata=dict(marshmallow_field=...)). For more information, see https://github.com/lovasoa/marshmallow_dataclass/issues/51 ****** WARNING ******
warnings.warn(
Traceback (most recent call last):
File "/usr/lib/python3.10/dataclasses.py", line 1197, in fields
    fields = getattr(class_or_instance, _FIELDS)
AttributeError: 'function' object has no attribute '__dataclass_fields__'. Did you mean: '__dataclass_params__'?

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/__init__.py", line 370, in _internal_class_schema
    fields: Tuple[dataclasses.Field, ...] = dataclasses.fields(clazz)
File "/usr/lib/python3.10/dataclasses.py", line 1199, in fields
    raise TypeError('must be called with a dataclass type or instance')
TypeError: must be called with a dataclass type or instance

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/__init__.py", line 384, in _internal_class_schema
    created_dataclass: type = dataclasses.dataclass(clazz)
File "/usr/lib/python3.10/dataclasses.py", line 1185, in dataclass
    return wrap(cls)
File "/usr/lib/python3.10/dataclasses.py", line 1176, in wrap
    return _process_class(cls, init, repr, eq, order, unsafe_hash,
File "/usr/lib/python3.10/dataclasses.py", line 909, in _process_class
    for b in cls.__mro__[-1:0:-1]:
AttributeError: 'function' object has no attribute '__mro__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/username/testscript.python", line 9, in <module>
    MyIps.Schema().load({"ips": ["0.0.0.0", "grumble grumble"]})
File "/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/lazy_class_attribute.py", line 33, in __get__
    setattr(cls, self.name, self.func())
File "/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/__init__.py", line 356, in class_schema
    return _internal_class_schema(clazz, base_schema, clazz_frame)
File "/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/__init__.py", line 402, in _internal_class_schema
    attributes.update(
File "/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/__init__.py", line 405, in <genexpr>
    field_for_schema(
File "/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/__init__.py", line 695, in field_for_schema
    generic_field = _field_for_generic_type(typ, base_schema, typ_frame, **metadata)
File "/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/__init__.py", line 503, in _field_for_generic_type
    child_type = field_for_schema(
File "/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/__init__.py", line 729, in field_for_schema
    or _internal_class_schema(typ, base_schema, typ_frame)
File "/home/username/.local/share/virtualenvs/venv_3.10/lib/python3.10/site-packages/marshmallow_dataclass/__init__.py", line 387, in _internal_class_schema
    raise TypeError(
TypeError: IPv4 is not a dataclass and cannot be turned into one.

我现在的安装是python3.10.6和marshmallow_dataclasses 8.5.8。(代码使用python3.9和棉花糖数据8.3.0)是否有人知道为什么会发生这种情况，以及如何解决这个问题(很明显，除了降级之外)，还有其他人有这个问题吗？这是一种新的行为吗?我应该调整我们的代码(如果是的话，怎么做？)这是个虫子吗？

Answer 1

在试图升级marshmallow_dataclasses之后，类似的代码也出现了类似的问题，导致了错误。

import dataclasses

import marshmallow_dataclass

ARGON2_PASSWORD = marshmallow_dataclass.NewType(
    "ARGON2_PASSWORD",
    str,
    validate=validate.Regexp(
        r"[$]argon2(?:id|i)[$]v=\d{1,3}[$]m=\d{3,20},t=\d{1,4},"
        r"p=\d{1,2}[$][^$]{1,100}[$][^$]{1,768}"))


@marshmallow_dataclass.add_schema
@dataclasses.dataclass
class Argon2Password:
    password: ARGON2_PASSWORD

详细的根本原因目前已在https://github.com/lovasoa/marshmallow_dataclass/issues/206 afaics中讨论过。

目前，下调到typing-inspect==0.7.1的评级对我来说是个热点。