如何使用带有变量的jinja访问sqlalchemy表列

from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from jinja2 import Template

engine = create_engine('数据库连接字符串')
Session = sessionmaker(bind=engine)
session = Session()

Base = declarative_base()

class MyTable(Base):
    __tablename__ = 'my_table'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    age = Column(Integer)

# 查询数据库
result = session.query(MyTable).all()

# 定义Jinja模板
template_str = "姓名: {{ item.name }}, 年龄: {{ item.age }}"

# 遍历查询结果并渲染模板
for item in result:
    template = Template(template_str)
    rendered_text = template.render(item=item)
    print(rendered_text)