Как создать связь между моделями в SQLAlchemy?

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from sqlalchemy import Column, Integer, String, ForeignKey
from sqlalchemy.orm import relationship
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    name = Column(String)

class UserProfile(Base):
    __tablename__ = 'user_profiles'
    id = Column(Integer, primary_key=True)
    user_id = Column(Integer, ForeignKey('users.id'))
    user = relationship("User", uselist=False, back_populates="profile")
    address = Column(String)

User.profile = relationship("UserProfile", uselist=False, back_populates="user")

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from sqlalchemy import Column, Integer, String, ForeignKey
from sqlalchemy.orm import relationship
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

class Author(Base):
    __tablename__ = 'authors'
    id = Column(Integer, primary_key=True)
    name = Column(String)

class Book(Base):
    __tablename__ = 'books'
    id = Column(Integer, primary_key=True)
    title = Column(String)
    author_id = Column(Integer, ForeignKey('authors.id'))
    author = relationship("Author", back_populates="books")

Author.books = relationship("Book", order_by=Book.id, back_populates="author")

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from sqlalchemy import (
    Column,
    Integer,
    String,
    Table,
    ForeignKey
)
from sqlalchemy.orm import relationship
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

association_table = Table('association', Base.metadata,
    Column('left_id', Integer, ForeignKey('left.id')),
    Column('right_id', Integer, ForeignKey('right.id'))
)

class Left(Base):
    __tablename__ = 'left'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    rights = relationship('Right', secondary=association_table, back_populates='lefts')

class Right(Base):
    __tablename__ = 'right'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    lefts = relationship('Left', secondary=association_table, back_populates='rights')