How can I determine the type (e.g. many-to-one) of a dynamic SQLAlchemy relationship?

Suppose I have the following SQLAlchemy classes defined:

Base = declarative_base()

class Person(Base):
    __tablename__ = 'person'
    id = Column(Integer, primary_key=True)
    computers = relationship('Computer', backref=backref('owner', lazy='dynamic'))

class Computer(Base):
    __tablename__ = 'computer'
    id = Column(Integer, primary_key=True)
    ownerid = Column(Integer, ForeignKey('person.id'))

Suppose further that I have accessed the lazy query object this way:

relation = getattr(Computer, 'owner')

How can I determine if relation refers to a single instance of Person (that is, in a many-to-one relationship, like in this example), or if relation refers to a collection of instances (like in a one-to-many relationship)? In other words, how can I determine the relationship type of a dynamic SQLAlchemy relationship object?