Is the _HAS_DEFAULT_FACTORY here expected?

[yueyinqiu]

The following code outputs a _HAS_DEFAULT_FACTORY, which doesn't seem to be what I expected:

import astroid

node = astroid.parse(
    """
    from dataclasses import dataclass

    @dataclass
    class A:
        pass
    """)

print(node.locals)
# {'A': [<ClassDef.A l.5 at 0x26f9601b7a0>], 
# 'dataclass': [<ImportFrom l.2 at 0x26f953f3ed0>], 
# '_HAS_DEFAULT_FACTORY': [<AssignName._HAS_DEFAULT_FACTORY l.1 at 0x26f9603ecd0>]}

The _HAS_DEFAULT_FACTORY seems to be related to @dataclass, but I haven't found out why it exists here.

I also tried the following script, and it won't include _HAS_DEFAULT_FACTORY:

from dataclasses import dataclass

@dataclass
class A:
    pass

print(locals().keys())
# dict_keys(['__name__', '__doc__', '__package__', 
# '__loader__', '__spec__', '__annotations__', 
# '__builtins__', '__file__', '__cached__', 
# 'dataclass', 'A'])

(python 3.13.5, astroid 3.3.11)