old_contents: import glob, os, sys, unittest, netCDF4
  from netCDF4 import getlibversion,__hdf5libversion__,__netcdf4libversion__,__version__
  
  # can also just run
  # python -m unittest discover . 'tst*py'
  
  python3 = sys.version_info[0] > 2
  
  # Find all test files.
  test_files = glob.glob('tst_*.py')
  if python3:
      test_files.remove('tst_unicode.py')
      sys.stdout.write('not running tst_unicode.py ...\n')
  else:
      test_files.remove('tst_unicode3.py')
      sys.stdout.write('not running tst_unicode3.py ...\n')
  if __netcdf4libversion__ < '4.2.1':
      test_files.remove('tst_diskless.py')
      sys.stdout.write('not running tst_diskless.py ...\n')
  
  # Don't run tests that require network connectivity
  if os.environ['NO_NET']:
      test_files.remove('tst_dap.py');
      sys.stdout.write('not running tst_dap.py ...\n')
  
  # Build the test suite from the tests found in the test files.
  testsuite = unittest.TestSuite()
  for f in test_files:
      m = __import__(os.path.splitext(f)[0])
      testsuite.addTests(unittest.TestLoader().loadTestsFromModule(m))
  
  # Run the test suite.
  def test(verbosity=1):
      runner = unittest.TextTestRunner(verbosity=verbosity)
      runner.run(testsuite)
  
  if __name__ == '__main__':
      import numpy
      sys.stdout.write('\n')
      sys.stdout.write('netcdf4-python version: %s\n' % __version__)
      sys.stdout.write('HDF5 lib version:       %s\n' % __hdf5libversion__)
      sys.stdout.write('netcdf lib version:     %s\n' % __netcdf4libversion__)
      sys.stdout.write('numpy version           %s\n' % numpy.__version__)
      runner = unittest.TextTestRunner(verbosity=1)
      result = runner.run(testsuite)
      if not result.wasSuccessful():
          sys.exit(1)
  
new_contents: import glob, os, sys, unittest, netCDF4
  from netCDF4 import getlibversion,__hdf5libversion__,__netcdf4libversion__,__version__
  
  # can also just run
  # python -m unittest discover . 'tst*py'
  
  python3 = sys.version_info[0] > 2
  
  # Find all test files.
  test_files = glob.glob('tst_*.py')
  if python3:
      test_files.remove('tst_unicode.py')
      sys.stdout.write('not running tst_unicode.py ...\n')
  else:
      test_files.remove('tst_unicode3.py')
      sys.stdout.write('not running tst_unicode3.py ...\n')
  if __netcdf4libversion__ < '4.2.1':
      test_files.remove('tst_diskless.py')
      sys.stdout.write('not running tst_diskless.py ...\n')
  
  # Don't run tests that require network connectivity
  if os.getenv('NO_NET'):
      test_files.remove('tst_dap.py');
      sys.stdout.write('not running tst_dap.py ...\n')
  
  # Build the test suite from the tests found in the test files.
  testsuite = unittest.TestSuite()
  for f in test_files:
      m = __import__(os.path.splitext(f)[0])
      testsuite.addTests(unittest.TestLoader().loadTestsFromModule(m))
  
  # Run the test suite.
  def test(verbosity=1):
      runner = unittest.TextTestRunner(verbosity=verbosity)
      runner.run(testsuite)
  
  if __name__ == '__main__':
      import numpy
      sys.stdout.write('\n')
      sys.stdout.write('netcdf4-python version: %s\n' % __version__)
      sys.stdout.write('HDF5 lib version:       %s\n' % __hdf5libversion__)
      sys.stdout.write('netcdf lib version:     %s\n' % __netcdf4libversion__)
      sys.stdout.write('numpy version           %s\n' % numpy.__version__)
      runner = unittest.TextTestRunner(verbosity=1)
      result = runner.run(testsuite)
      if not result.wasSuccessful():
          sys.exit(1)
  
subject: Use getenv instead of environ to prevent KeyError if unset.