问题是这行:
__all__ = (
"Base",
"TimestampMixin",
"BaseUser",
"User",
"Locale",
"DBBot"
)
它会让你变成这样的
__all__ = ("Base", "TimestampMixin", "BaseUser", "User", "Locale", "DBBot")
__all__ = (
"Base",
"TimestampMixin",
"BaseUser",
"User",
"Locale",
"DBBot",
)