[Python] Using SQLAlchemy relationships while avoiding circular dependency with imports

I am having a problem using db.relationships. I noticed that to use relationships in my queries, each models that references another through a relationship has to be aware of that model (through imports as in my example below). All my models are in separate files, so I am afraid I will face circular dependency issues. Can any suggest to me how to overcome this constraints.

from .models.role import Role

class User(db.Model, BaseModel):
__tablename__ = 'user'

id = db.Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, unique=True, nullable=False)
first_name = db.Column(String(255), nullable=False)
last_name = db.Column(String(255), nullable=False)
email = db.Column(String(255), nullable=False)
role_id = db.Column(UUID(as_uuid=True), db.ForeignKey('role.id'), nullable=False)

role = db.relationship("Role", back_populates="user")


from .models.user import User

class Role(db.Model):
__tablename__ = 'role'

id = db.Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, unique=True, nullable=False)
name = db.Column(String(60), nullable=False)
description = db.Column(String(255), nullable=True)

users = db.relationship('User', back_populates='role')

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