小编Jac*_*ang的帖子

from pydantic import BaseModel

class A(BaseModel):
    date = ''

class B(A):
    person: float

    def __init__(self):
        self.person = 0
    
B()

尝试启动类 B 但引发错误 AttributeError: 'B' object has no attribute ' fields_set '，为什么呢？