pip a través de proxy

Problema: pip muestra este error al tartar de buscar o instalar software

Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError(': Failed to establish a new connection: [Errno -2] Name or service not known',))': /pypi

Solución:

1. Exportar las variables http_proxy y https_proxy

export http_proxy=http://192.168.123.10:3128
export https_proxy=http://192.168.123.10:3128

2. Usar pip normalmente como

pip search django