我已经在win7上安装了python 3.4，但是无法使用pip工作，我不断收到以下错误：
pip install django
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'ProtocolError('Connection aborted.', OSError(10057, '(when sending on a datagram socket using a sendto call) no address was supplied', None, 10057, None))': /pypi
...
pip._vendor.requests.exceptions.ConnectionError: HTTPSConnectionPool(host='pypi.python.org', port=443): Max retries exceeded with url: /pypi (Caused by ProtocolError('Connection aborted.', OSError(10057