text: # Copyright 2021 The Cirq Developers
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     https://www.apache.org/licenses/LICENSE-2.0
  #
  # 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 os
  import random
  
  import pytest
  
  # allow CI execution of isolated_packages_test.py without numpy
  try:
      import numpy
  except ImportError:
      # coverage: ignore
      numpy = None
  
  
  def pytest_configure(config):
      # Ignore deprecation warnings in python code generated from our protobuf definitions.
      # Eventually, the warnings will be removed by upgrading protoc compiler. See issues
      # #4161 and #4737.
      for f in (
          "FieldDescriptor",
          "Descriptor",
          "EnumDescriptor",
          "EnumValueDescriptor",
          "FileDescriptor",
          "OneofDescriptor",
      ):
          config.addinivalue_line("filterwarnings", f"ignore:Call to deprecated create function {f}")
  
  
  def pytest_addoption(parser):
      parser.addoption(
          "--rigetti-integration",
          action="store_true",
          default=False,
          help="run Rigetti integration tests",
      )
  
  
  @pytest.fixture
  def closefigures():
      import matplotlib.pyplot as plt
  
      yield
      plt.close('all')
  
  
  # skip seeding for unset or empty CIRQ_TESTING_RANDOM_SEED
  if numpy is not None and os.environ.get('CIRQ_TESTING_RANDOM_SEED'):
      rngseed = int(os.environ['CIRQ_TESTING_RANDOM_SEED'])
      random.seed(rngseed)
      numpy.random.seed(rngseed)
  