content: import pytest
  
  import numpy
  import pandas
  import pandas.util.testing as tm
  
  
  def pytest_addoption(parser):
      parser.addoption("--skip-slow", action="store_true",
                       help="skip slow tests")
      parser.addoption("--skip-network", action="store_true",
                       help="skip network tests")
      parser.addoption("--run-high-memory", action="store_true",
                       help="run high memory tests")
      parser.addoption("--only-slow", action="store_true",
                       help="run only slow tests")
  
  
  def pytest_runtest_setup(item):
      if 'slow' in item.keywords and item.config.getoption("--skip-slow"):
          pytest.skip("skipping due to --skip-slow")
  
      if 'slow' not in item.keywords and item.config.getoption("--only-slow"):
          pytest.skip("skipping due to --only-slow")
  
      if 'network' in item.keywords and item.config.getoption("--skip-network"):
          pytest.skip("skipping due to --skip-network")
  
      if 'high_memory' in item.keywords and not item.config.getoption(
              "--run-high-memory"):
          pytest.skip(
              "skipping high memory test since --run-high-memory was not set")
  
  
  # Configurations for all tests and all test modules
  
  @pytest.fixture(autouse=True)
  def configure_tests():
      pandas.set_option('chained_assignment', 'raise')
  
  
  # For running doctests: make np and pd names available
  
  @pytest.fixture(autouse=True)
  def add_imports(doctest_namespace):
      doctest_namespace['np'] = numpy
      doctest_namespace['pd'] = pandas
  
  
  @pytest.fixture(params=['bsr', 'coo', 'csc', 'csr', 'dia', 'dok', 'lil'])
  def spmatrix(request):
      tm._skip_if_no_scipy()
      from scipy import sparse
      return getattr(sparse, request.param + '_matrix')
  
  
  @pytest.fixture
  def ip():
      """
      Get an instance of IPython.InteractiveShell.
  
      Will raise a skip if IPython is not installed.
      """
  
      pytest.importorskip('IPython', minversion="6.0.0")
      from IPython.core.interactiveshell import InteractiveShell
      return InteractiveShell()
  