How to use sendgrid library

call_sendgrid_function.py

template = "some-template.html"
template_params = {"var1": "value1", "var2": "value2"}

jinja_env = jinja2.Environment(loader=jinja2.FileSystemLoader(template_dir),
                                   extensions=['jinja2.ext.autoescape'],
                                   autoescape=False)

html_template = jinja_env.get_template(template)

if not template_params:
    template_params = {}

html_message_body = html_template.render(template_params)

send_via_sendgrid(sender_email="example@email.si", sender_name="Sender Name", receiver_email="example2@email.si", 
                  email_subject="Some subject", content=html_message_body)

sendgrid_helper.py

def send_via_sendgrid(sender_email, sender_name, receiver_email, email_subject, content):
    SENDGRID_API_KEY = "sendgrid API key"
    sg = sendgrid.SendGridAPIClient(api_key=SENDGRID_API_KEY)

    email_message = mail.Mail()
    email_message.set_from(mail.Email(sender_email, sender_name))
    email_message.set_subject(email_subject)
    email_message.add_content(mail.Content("text/html", content))

    personalization = mail.Personalization()
    personalization.add_to(mail.Email(receiver_email))

    email_message.add_personalization(personalization)

    try:
        response = sg.client.mail.send.post(request_body=email_message.get())

        if response.status_code != 200 and response.status_code != 202:
            logging.error("status code: " + str(response.status_code))
            logging.error("headers: " + str(response.headers))
            return logging.error("body: " + str(response.body))
    except Exception as e:
        logging.error("Error with sending via sendgrid.")
        return logging.error(e.message)