old_contents: #!/usr/bin/env python
  """
  Unittests for csvnc module
  
  """
  
  import os
  import pytest
  from csvnc import csvnc
  
  
  class TestCsvnc(object):
      def test_generated_file_should_have_extention_nc(self):
          data_file = 'data.csv'
          assert 'data.nc' == csvnc.new_name(data_file)
  
  
new_contents: #!/usr/bin/env python
  """
  Unittests for csvnc module
  
  """
  
  import pytest
  import os
  from csvnc import csvnc
  
  
  class TestCsvnc(object):
      def test_generated_file_should_have_extention_nc(self):
          data_file = 'data.csv'
          assert 'data.nc' == csvnc.new_name(data_file)
  
  
subject: Change import order