how to set quota with python in openstack

got error when set quota in RDO or production environment of openstack

already set insecure = True, but can not set quota

>>> nc.quotas.update(my_tenant.id, floating_ips=1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/novaclient/v2/quotas.py", line 57, in update
    return self._update(url, body, 'quota_set')
  File "/usr/lib/python2.7/site-packages/novaclient/base.py", line 182, in _update
    _resp, body = self.api.client.put(url, body=body)
  File "/usr/lib/python2.7/site-packages/novaclient/client.py", line 452, in put
    return self._cs_request(url, 'PUT', **kwargs)
  File "/usr/lib/python2.7/site-packages/novaclient/client.py", line 402, in _cs_request
    self.authenticate()
  File "/usr/lib/python2.7/site-packages/novaclient/client.py", line 555, in authenticate
    auth_url = self._v2_auth(auth_url)
  File "/usr/lib/python2.7/site-packages/novaclient/client.py", line 646, in _v2_auth
    return self._authenticate(url, body)
  File "/usr/lib/python2.7/site-packages/novaclient/client.py", line 659, in _authenticate
    **kwargs)
  File "/usr/lib/python2.7/site-packages/novaclient/client.py", line 397, in _time_request
    resp, body = self.request(url, method, **kwargs)
  File "/usr/lib/python2.7/site-packages/novaclient/client.py", line 391, in request
    raise exceptions.from_response(resp, body, url, method)
novaclient.exceptions.Unauthorized: The request you have made requires authentication. (HTTP 401)


   from keystoneclient.v2_0.client import Client
import os
import csv
import sys
import logging
import time
from nova import db
from nova import config
from nova import context
import argparse
import novaclient.v1_1.client as nvclient


def get_nova_credentials_v2():
    d = {}
    d['version'] = '2'
    d['username'] = os.environ['OS_USERNAME']
    d['password'] = os.environ['OS_PASSWORD']
    d['auth_url'] = os.environ['OS_AUTH_URL']
    d['tenant_name'] = os.environ['OS_TENANT_NAME']
    d['insecure'] = "True"
    return d


credentials = get_nova_credentials_v2()
keystone_client = Client(**credentials)
tenants = keystone_client.tenants.list()
rolelist = keystone_client.roles.list()
userlist = keystone_client.users.list()
my_admin = [x for x in rolelist if x.name=="admin"][0]
my_member = [x for x in rolelist if x.name=="_member_"][0]
my_admin_user = [x for x in userlist if x.name=="admin"][0]

my_tenant = [x for x in tenants if x.name=="hello"][0]
nc = nvclient.Client(None, None, None, auth_url=os.environ['OS_AUTH_URL'], tenant_id=my_tenant.id, auth_token=keystone_client.auth_token, insecure='True')
nc.quotas.update(my_tenant.id, floating_ips=1)