urllib3 is a powerful, sanity-friendly HTTP client for Python. Much of the Python 
ecosystem already uses urllib3 and you should too. urllib3 brings many critical features 
that are missing from the Python standard libraries:

Thread safety.
Connection pooling.
Client-side SSL/TLS verification.
File uploads with multipart encoding.
Helpers for retrying requests and dealing with HTTP redirects.
Support for gzip and deflate encoding.
Proxy support for HTTP and SOCKS.
100% test coverage.
