text: import os.path
  import sys
  
  import setuptools
  
  root_dir = os.path.abspath(os.path.dirname(__file__))
  
  description = "An implementation of the WebSocket Protocol (RFC 6455)"
  
  with open(os.path.join(root_dir, 'README.rst')) as f:
      long_description = f.read()
  
  with open(os.path.join(root_dir, 'websockets', 'version.py')) as f:
      exec(f.read())
  
  py_version = sys.version_info[:2]
  
  if py_version < (3, 3):
      raise Exception("websockets requires Python >= 3.3.")
  
  packages = ['websockets']
  
  if py_version >= (3, 5):
      packages.append('websockets/py35')
  
  setuptools.setup(
      name='websockets',
      version=version,
      description=description,
      long_description=long_description,
      url='https://github.com/aaugustin/websockets',
      author='Aymeric Augustin',
      author_email='aymeric.augustin@m4x.org',
      license='BSD',
      classifiers=[
          'Development Status :: 5 - Production/Stable',
          'Environment :: Web Environment',
          'Intended Audience :: Developers',
          'License :: OSI Approved :: BSD License',
          'Operating System :: OS Independent',
          'Programming Language :: Python',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.3',
          'Programming Language :: Python :: 3.4',
          'Programming Language :: Python :: 3.5',
      ],
      packages=packages,
      extras_require={
          ':python_version=="3.3"': ['asyncio'],
      },
  )
  