With sendgrid and python, how to send an email to multiple BCC at once?

Question

Please, in python3 and sendgrid I need to send an email to multiple addresses in BCC way. I have these emails on a list. I'm trying like this with Personalization:

import os
import json
from sendgrid import SendGridAPIClient
from sendgrid.helpers.mail import Mail, Personalization, From, To, Cc, Bcc

recips = ['[email protected]', '[email protected]', '[email protected]']

new_email = Mail(from_email='[email protected]', 
              to_emails = '[email protected]',
              subject= "email subject", 
              html_content="Hi<br><br>This is a test")

personalization = Personalization()
for bcc_addr in recips:
    personalization.add_bcc(Bcc(bcc_addr))

new_email.add_personalization(personalization)

try:
    sg = SendGridAPIClient('API_KEY')
    response = sg.send(new_email)
    print(response.status_code)
    print(response.body)
    print(response.headers)
except Exception as e:
    print(e.to_dict)

In a test with real email addresses an error appears: HTTP Error 400: Bad Request, with dictionary: {'errors': [{'message': 'The to array is required for all personalization objects, and must have at least one email object with a valid email address.', 'field': 'personalizations.0.to', 'help': 'http://sendgrid.com/docs/API_Reference/Web_API_v3/Mail/errors.html#message.personalizations.to'}]}

Please does anyone know why?