How to create a active asm policy use rest api in v11.6.1?

Here is code I test worked to create a active asm policy.

!/usr/bin/env python
 -*- coding=utf-8 -*-
import requests
import json

requests.packages.urllib3.disable_warnings()
def create_asm_policy(bigip, asm_policy_name):
    """create active asm policy"""
    payload = {}
    payload['name'] = asm_policy_name + '_asm_policy'
    payload['applicationLanguage'] = 'utf-8'
    payload['enforcementMode'] = 'transparent'
    payload['templateReference'] = {'link': 'https://localhost/mgmt/tm/asm/policy-templates/EY4J-L6HK0AXUYXIc0VjDQ'}
    payload['policyBuilderEnabled'] = False
    bigip.post('%s/asm/policies' % BIGIP_BASE_URL, data=json.dumps(payload)).json()
    policy_url = bigip.get('%s/asm/policies?$filter=name+eq+%s' % (BIGIP_BASE_URL, asm_policy_name + '_asm_policy')).json()['items'][0]['selfLink']
    policy_payload = {}
    policy_payload['policyReference'] = {'link': policy_url}
    bigip.post('%s/asm/tasks/apply-policy/' % BIGIP_BASE_URL, data=json.dumps(policy_payload)).json()
    bigip.patch('%s%s/' % (BIGIP_BASE_URL, policy_url[25:]), data=json.dumps({'active': True})).json()

if __name__ == '__main__':
    bigip = requests.session()
    bigip.auth = ('admin', 'admin')
    bigip.verify = False
    bigip.headers.update({'Content-Type': 'application/json'})
    BIGIP_ADDRESS = '10.10.0.21'
    BIGIP_BASE_URL = 'https://%s/mgmt/tm' % BIGIP_ADDRESS