'Sets the proxy server host and port for the HTTP CONNECT Tunnelling.
host:
Address of the proxy. Ex: \'192.168.0.100\'
port:
Port of the proxy. Ex: 6000
user:
User for proxy authorization.
password:
Password for proxy authorization.'

def set_proxy(self, host, port, user=None, password=None):

    self._httpclient.set_proxy(host, port, user, password)
