requests digest auth with netrc

[fstefanov]

Ok at this time Requests does not enable the use of Digest Auth with ~/.netrc

So i came up with simple function do to the job for me

def password_from_netrc(remote_url):
   rec = re.compile(r"https?://(www\.)?")
   url_no_proto = rec.sub('',remote_url).strip().strip('/')
   try:
       auth = netrc.netrc().authenticators(url_no_proto)
   except IOError:
       print('~/.netrc does not exist.')
       quit(1)
   if auth is None:
       print('%s not found in ~/.netrc' % url_no_proto)
       print('example: machine %s login <Username> password <Password>' % url_no_proto)
       quit(1)
   username = (auth[0])
   password = auth[2]
   return username, password