如何在我的Sendgrid事务模板中包含Jinja2模板

import jinja2
from sendgrid import SendGridAPIClient
from sendgrid.helpers.mail import Mail

# 定义模板变量
name = "John Doe"

# 加载Jinja2模板
template_loader = jinja2.FileSystemLoader(searchpath="path/to/templates")
template_env = jinja2.Environment(loader=template_loader)
template = template_env.get_template("template.j2")

# 渲染模板
rendered_template = template.render(name=name)

# 创建Sendgrid邮件
message = Mail(
    from_email="from@example.com",
    to_emails="to@example.com",
    subject="Hello from Sendgrid",
    html_content=rendered_template
)

# 发送邮件
try:
    sg = SendGridAPIClient(api_key="YOUR_SENDGRID_API_KEY")
    response = sg.send(message)
    print(response.status_code)
    print(response.body)
    print(response.headers)
except Exception as e:
    print(str(e))