old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  import os
  import sys
  from setuptools import setup
  from setuptools.command.test import test as TestCommand
  
  from schematics import __version__
  
  
  class Tox(TestCommand):
  
      def finalize_options(self):
          TestCommand.finalize_options(self)
          self.test_args = ['--recreate']
          self.test_suite = True
  
      def run_tests(self):
          # import here, cause outside the eggs aren't loaded
          import tox
          errno = tox.cmdline(self.test_args)
          sys.exit(errno)
  
  
  tests_require = open(
      os.path.join(os.path.dirname(__file__), 'requirements-testing.txt')).read().split() + ['tox']
  
  setup(
      name='schematics',
      license='BSD',
      version=__version__,
      description='Structured Data for Humans',
      author=u'James Dennis, Jökull Sólberg, Jóhann Þorvaldur Bergþórsson',
      author_email='jdennis@gmail.com, jokull@plainvanillagames.com, johann@plainvanillagames.com',
      url='http://github.com/schematics/schematics',
      packages=['schematics', 'schematics.types', 'schematics.contrib'],
      classifiers=[
          'Environment :: Other Environment',
          'Intended Audience :: Developers',
          'License :: Other/Proprietary License',
          'Operating System :: POSIX',
          'Programming Language :: Python',
          'Programming Language :: Python :: 2.6',
          'Programming Language :: Python :: 2.7',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.3',
          'Programming Language :: Python :: 3.4',
      ],
      cmdclass={
          'test': Tox,
      },
      tests_require=tests_require,
  )
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  import os
  import sys
  from setuptools import setup
  from setuptools.command.test import test as TestCommand
  
  from schematics import __version__
  
  
  class Tox(TestCommand):
  
      def finalize_options(self):
          TestCommand.finalize_options(self)
          self.test_args = ['--recreate']
          self.test_suite = True
  
      def run_tests(self):
          # import here, cause outside the eggs aren't loaded
          import tox
          errno = tox.cmdline(self.test_args)
          sys.exit(errno)
  
  
  tests_require = open(
      os.path.join(os.path.dirname(__file__), 'requirements-testing.txt')).read().split() + ['tox']
  
  setup(
      name='schematics',
      license='BSD',
      version=__version__,
      description='Structured Data for Humans',
      author=u'James Dennis, Jökull Sólberg, Jóhann Þorvaldur Bergþórsson',
      author_email='jdennis@gmail.com, jokull@plainvanillagames.com, johann@plainvanillagames.com',
      url='http://github.com/schematics/schematics',
      packages=['schematics', 'schematics.types', 'schematics.contrib'],
      classifiers=[
          'Environment :: Other Environment',
          'Intended Audience :: Developers',
          'License :: Other/Proprietary License',
          'Operating System :: POSIX',
          'Programming Language :: Python',
          'Programming Language :: Python :: 2.6',
          'Programming Language :: Python :: 2.7',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.3',
          'Programming Language :: Python :: 3.4',
      ],
      cmdclass={
          'test': Tox,
      },
      install_requires=[
          'six>=1.7.3',
      ],
      tests_require=tests_require,
  )
  
subject: Add a requirement for six