➜ begtut>python demo_requests_head.py
{'Content-Encoding': 'gzip', 'Cache-Control': 'public', 'Content-Type': 'text/html', 'Date': '', 'Server': 'Microsoft-IIS/7.5', 'Vary': 'Accept-Encoding', 'X-Frame-Options': 'SAMEORIGIN', 'X-Powered-By': 'PHP/5-4-2. ASP.NET', 'Content-Length': '0'}