Python 在 sendgrid 中发送多个动态模板邮箱时，个性化字段错误

我试图在Django中使用Sendgrid动态模板发送一封批量邮箱，但收到了以下错误:The personalizations field is required and must have at least one personalization.

使用sendgrid 6.9.7

有人知道我可能会出什么问题吗:

from django.conf import settings
from sendgrid import SendGridAPIClient
from sendgrid.helpers.mail import Mail, To

def send_mass_email():

    to_emails = [
        To(email='email1@gmail.com',
           dynamic_template_data={
              "thing_i_want_personalized": 'hello email 1',
           }),
        To(email='email2@gmail.com',
           dynamic_template_data={
              "thing_i_want_personalized": 'hello email 2',
           }),
    ]

    msg = Mail(
      from_email='notifications@mysite.com>',
    )
    msg.to_emails = to_emails
    msg.is_multiple = True
    msg.template_id = "d-template_id"

    try:
        sendgrid_client = SendGridAPIClient(settings.SENDGRID_API_KEY)
        response = sendgrid_client.send(msg)
        print(response.status_code)
        print(response.body)
        print(response.headers)
    except Exception as e:
        print(e)
        print(e.body)

    return

输出是

HTTP Error 400: Bad Request
b'{"errors":[{"message":"The personalizations field is required and must have at least one personalization.","field":"personalizations","help":"http://sendgrid.com/docs/API_Reference/Web_API_v3/Mail/errors.html#-Personalizations-Errors"}]}'