text: # -*- coding: utf-8 -*-
  """
   * TencentBlueKing is pleased to support the open source community by making 蓝鲸智云-蓝鲸 PaaS 平台(BlueKing-PaaS) available.
   * Copyright (C) 2017-2021 THL A29 Limited, a Tencent company. All rights reserved.
   * Licensed under the MIT License (the "License"); you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at http://opensource.org/licenses/MIT
   * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
   * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
   * specific language governing permissions and limitations under the License.
  """
  import random
  from string import ascii_lowercase, digits
  
  
  def generate_random_string(length=30, chars=(ascii_lowercase + digits)):
      """Generates a non-guessable OAuth token
  
      OAuth (1 and 2) does not specify the format of tokens except that they
      should be strings of random characters. Tokens should not be guessable
      and entropy when generating the random characters is important. Which is
      why SystemRandom is used instead of the default random.choice method.
      """
      rand = random.SystemRandom()
      return ''.join(rand.choice(chars) for x in range(length))
  