old_contents: from airtime_analyzer.analyzer import Analyzer
  from nose.tools import *
  
  
  def setup():
      pass
  
  
  def teardown():
      pass
  
  
  @raises(NotImplementedError)
  def test_analyze():
      abstract_analyzer = Analyzer()
      abstract_analyzer.analyze(u"foo", dict())
  
new_contents: import pytest
  from airtime_analyzer.analyzer import Analyzer
  
  
  def test_analyze():
      with pytest.raises(NotImplementedError):
          abstract_analyzer = Analyzer()
          abstract_analyzer.analyze(u"foo", dict())
  
subject: Migrate analyzer_test to pytest