old_contents: # -*- coding: utf-8 -*-
  '''Test using a proxy.'''
  
  # External imports
  import multiprocessing
  import pytest
  requests = pytest.importorskip("requests")
  
  from six.moves import socketserver, SimpleHTTPServer
  from six.moves.urllib.request import urlopen
  
  # Internal imports
  import vcr
  
  
  class Proxy(SimpleHTTPServer.SimpleHTTPRequestHandler):
      '''
      Simple proxy server.
  
      (from: http://effbot.org/librarybook/simplehttpserver.htm).
      '''
      def do_GET(self):
          self.copyfile(urlopen(self.path), self.wfile)
  
  
  @pytest.yield_fixture(scope='session')
  def proxy_server(httpbin):
      httpd = socketserver.ForkingTCPServer(('', 0), Proxy)
      proxy_process = multiprocessing.Process(
          target=httpd.serve_forever,
      )
      proxy_process.start()
      yield 'http://{}:{}'.format(*httpd.server_address)
      proxy_process.terminate()
  
  
  def test_use_proxy(tmpdir, httpbin, proxy_server):
      '''Ensure that it works with a proxy.'''
      with vcr.use_cassette(str(tmpdir.join('proxy.yaml'))):
          requests.get(httpbin.url, proxies={'http': proxy_server})
          requests.get(httpbin.url, proxies={'http': proxy_server})
  
new_contents: # -*- coding: utf-8 -*-
  '''Test using a proxy.'''
  
  # External imports
  import multiprocessing
  import pytest
  
  from six.moves import socketserver, SimpleHTTPServer
  from six.moves.urllib.request import urlopen
  
  # Internal imports
  import vcr
  
  # Conditional imports
  requests = pytest.importorskip("requests")
  
  
  class Proxy(SimpleHTTPServer.SimpleHTTPRequestHandler):
      '''
      Simple proxy server.
  
      (from: http://effbot.org/librarybook/simplehttpserver.htm).
      '''
      def do_GET(self):
          self.copyfile(urlopen(self.path), self.wfile)
  
  
  @pytest.yield_fixture(scope='session')
  def proxy_server():
      httpd = socketserver.ThreadingTCPServer(('', 0), Proxy)
      proxy_process = multiprocessing.Process(
          target=httpd.serve_forever,
      )
      proxy_process.start()
      yield 'http://{0}:{1}'.format(*httpd.server_address)
      proxy_process.terminate()
  
  
  def test_use_proxy(tmpdir, httpbin, proxy_server):
      '''Ensure that it works with a proxy.'''
      with vcr.use_cassette(str(tmpdir.join('proxy.yaml'))):
          requests.get(httpbin.url, proxies={'http': proxy_server})
          requests.get(httpbin.url, proxies={'http': proxy_server})
  
subject: Fix format string for Python 2.6