tests/test_folders/models.py

from sqlalchemy import Column, Integer, String, DateTime
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

Base = declarative_base()

class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    username = Column(String, unique=True)
    password = Column(String)
    profile = Column(String)
    team_id = Column(Integer, ForeignKey('teams.id'))
    team = relationship('Team', backref='users')

class Team(Base):
    __tablename__ = 'teams'
    id = Column(Integer, primary_key=True)
    name = Column(String, unique=True)
    created_at = Column(DateTime, default=datetime.utcnow)

class Profile(Base):
    __tablename__ = 'profiles'
    id = Column(Integer, primary_key=True)
    user_id = Column(Integer, ForeignKey('users.id'))
    user = relationship('User', backref='profile')
    profile = Column(String)
    tags = Column(String)

engine = create_engine('sqlite:///database.db')
Base.metadata.create_all(engine)

Session = sessionmaker(bind=engine)
session = Session()