old_contents: import sqlalchemy as sa
  from sqlalchemy_utils import generates
  from sqlalchemy_utils.decorators import generator
  from tests import TestCase
  
  
  class GeneratesTestCase(TestCase):
      def test_generates_value_before_flush(self):
          article = self.Article()
          article.name = u'some article name'
          self.session.add(article)
          self.session.flush()
          assert article.slug == u'some-article-name'
  
  
  class TestGeneratesWithBoundMethodAndClassVariableArg(GeneratesTestCase):
      def create_models(self):
          class Article(self.Base):
              __tablename__ = 'article'
              id = sa.Column(sa.Integer, primary_key=True)
              name = sa.Column(sa.Unicode(255))
              slug = sa.Column(sa.Unicode(255))
  
              @generates(slug)
              def _create_slug(self):
                  return self.name.lower().replace(' ', '-')
  
          self.Article = Article
  
  
  class TestGeneratesWithBoundMethodAndStringArg(GeneratesTestCase):
      def create_models(self):
          class Article(self.Base):
              __tablename__ = 'article'
              id = sa.Column(sa.Integer, primary_key=True)
              name = sa.Column(sa.Unicode(255))
              slug = sa.Column(sa.Unicode(255))
  
              @generates('slug')
              def _create_slug(self):
                  return self.name.lower().replace(' ', '-')
  
          self.Article = Article
  
  
  class TestGeneratesWithFunctionAndClassVariableArg(GeneratesTestCase):
      def create_models(self):
          class Article(self.Base):
              __tablename__ = 'article'
              id = sa.Column(sa.Integer, primary_key=True)
              name = sa.Column(sa.Unicode(255))
              slug = sa.Column(sa.Unicode(255))
  
          @generates(Article.slug)
          def _create_article_slug(self):
              return self.name.lower().replace(' ', '-')
  
          self.Article = Article
  
new_contents: import sqlalchemy as sa
  from sqlalchemy_utils import generates
  from tests import TestCase
  
  
  class GeneratesTestCase(TestCase):
      def test_generates_value_before_flush(self):
          article = self.Article()
          article.name = u'some article name'
          self.session.add(article)
          self.session.flush()
          assert article.slug == u'some-article-name'
  
  
  class TestGeneratesWithBoundMethodAndClassVariableArg(GeneratesTestCase):
      def create_models(self):
          class Article(self.Base):
              __tablename__ = 'article'
              id = sa.Column(sa.Integer, primary_key=True)
              name = sa.Column(sa.Unicode(255))
              slug = sa.Column(sa.Unicode(255))
  
              @generates(slug)
              def _create_slug(self):
                  return self.name.lower().replace(' ', '-')
  
          self.Article = Article
  
  
  class TestGeneratesWithBoundMethodAndStringArg(GeneratesTestCase):
      def create_models(self):
          class Article(self.Base):
              __tablename__ = 'article'
              id = sa.Column(sa.Integer, primary_key=True)
              name = sa.Column(sa.Unicode(255))
              slug = sa.Column(sa.Unicode(255))
  
              @generates('slug')
              def _create_slug(self):
                  return self.name.lower().replace(' ', '-')
  
          self.Article = Article
  
  
  class TestGeneratesWithFunctionAndClassVariableArg(GeneratesTestCase):
      def create_models(self):
          class Article(self.Base):
              __tablename__ = 'article'
              id = sa.Column(sa.Integer, primary_key=True)
              name = sa.Column(sa.Unicode(255))
              slug = sa.Column(sa.Unicode(255))
  
          @generates(Article.slug)
          def _create_article_slug(self):
              return self.name.lower().replace(' ', '-')
  
          self.Article = Article
  
subject: Remove futile import