new_contents: # Be sure you have `mocket` installed:
  # $ pip install mocket
  
  import pook
  import requests
  from mocket.plugins.pook_mock_engine import MocketEngine
  
  # Use mocket library as underlying mock engine
  pook.set_mock_engine(MocketEngine)
  
  # Explicitly enable pook HTTP mocking (optional)
  pook.on()
  
  # Target server URL to mock out
  url = 'http://twitter.com/api/1/foobar'
  
  # Define your mock
  mock = pook.get(url,
                  reply=404, times=2,
                  headers={'content-type': 'application/json'},
                  response_json={'error': 'foo'})
  
  # Run first HTTP request
  requests.get(url)
  assert mock.calls == 1
  
  # Run second HTTP request
  res = requests.get(url)
  assert mock.calls == 2
  
  # Assert response data
  assert res.status_code == 404
  assert res.json() == {'error': 'foo'}
  
  # Explicitly disable pook (optional)
  pook.off()
  
subject: add mocket example file