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from __future__ import annotations
from typing import Optional
from sqlalchemy.orm import DeclarativeBase
from sqlalchemy.orm import Mapped
from sqlalchemy.orm import mapped_column
from sqlalchemy.orm import MappedAsDataclass
class Base(MappedAsDataclass, DeclarativeBase):
pass
class A(Base):
__tablename__ = "a"
id: Mapped[int] = mapped_column(primary_key=True, init=False)
data: Mapped[str]
x: Mapped[Optional[int]] = mapped_column(default=None)
y: Mapped[Optional[int]] = mapped_column(kw_only=True)
a1 = A(data="some data", y=5)
# EXPECTED_TYPE: str
reveal_type(a1.data)
# EXPECTED_RE_TYPE: .*Union\[builtins.int, None\]
reveal_type(a1.y)
a1.data = "some other data"
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