old_contents: from setuptools import setup
  import sys
  
  if sys.version_info[:2] <= (2, 5):
      webob_version = ' <= 1.1.1'
  elif sys.version_info[:2] >= (3, 0):
      webob_version = ' >= 1.2.2'
  else:
      webob_version = ''
  
  setup(
      setup_requires=['d2to1'],
      install_requires=[
          'six',
          'simplegeneric',
          'WebOb' + webob_version
      ],
      d2to1=True
  )
  
new_contents: from setuptools import setup
  import sys
  
  if sys.version_info[:2] <= (2, 5):
      webob_version = ' <= 1.1.1'
  elif sys.version_info[:2] >= (3, 0):
      webob_version = ' >= 1.2.2'
  else:
      webob_version = ''
  
  setup(
      setup_requires=['pbr>=0.5.21'],
      install_requires=[
          'six',
          'simplegeneric',
          'WebOb' + webob_version
      ],
      pbr=True
  )
  
subject: Switch to pbr