update_signature.py

def main():

    key_path = os.path.join(settings.INTERNAL_FILES, 'crm2', 'service_account_secrets.json')
    credentials = get_api_credentials(key_path=key_path)

    if not credentials:
        logger.info("No credential found, so stopping")
        return

    active_users = User.objects.filter(is_active=True)

    for user in active_users:
        email = user.email
        signature_template = ''

        try:
            expert = Expert.objects.get(user=user)
            signature_template = expert.signature
        except Expert.DoesNotExist:
            # Not an Expert, get signature_template from user
            ctx = create_layout_context_from_user(user)
            signature_template = get_signature(ctx)

        retry_count = 0
        while retry_count < 3:
            try:
                update_signature(user_email=email, template=signature_template, credentials=credentials, live=True)
                break
            except (RefreshError,TransportError) as e:
                retry_count += 1
                logger.info("Error encountered for: {0}, retrying (attempt {1}). Error was: {2}".format(user.username, retry_count, e))
                time.sleep(2)
                continue
            except Exception as e:
                raise
        else:
            logger.info("Failed to update {0}'s signature".format(user.username))