Fetch Google Contacts, authenticate with oauth2

cleanup_contacts.py

import argparse
from oauth2client.client import flow_from_clientsecrets
from oauth2client.file import Storage
from oauth2client import tools
from oauth2client.tools import run_flow
import gdata.contacts.data
import gdata.contacts.client

SCOPE = 'https://www.google.com/m8/feeds/'

def create_client():
  flow = flow_from_clientsecrets('client_secrets.json', scope=SCOPE, redirect_uri='http://localhost')

  storage = Storage('oauth-credentials.dat')
  credentials = storage.get()

  parser = argparse.ArgumentParser(parents=[tools.argparser])
  flags = parser.parse_args()

  if credentials is None or credentials.invalid:
      credentials = run_flow(flow, storage, flags)

  auth2token = gdata.gauth.OAuth2Token(
    client_id=credentials.client_id,
    client_secret=credentials.client_secret,
    scope=SCOPE,
    access_token=credentials.access_token,
    refresh_token=credentials.refresh_token,
    user_agent='contact-cleanup/1.0'
  )

  gd_client = gdata.contacts.client.ContactsClient(source='contact-cleanup', auth_token=auth2token)
  auth2token.authorize(gd_client)

  return gd_client

def update_contacts(gd_client, feed):
  if not feed.entry:
    print '\nNo contacts in feed.\n'
    return

  for i, entry in enumerate(feed.entry):
    if entry.name is not None:
      family_name = entry.name.family_name is None and " " or entry.name.family_name.text
      full_name = entry.name.full_name is None and " " or entry.name.full_name.text
      given_name = entry.name.given_name is None and " " or entry.name.given_name.text

      # Skip non-standard names
      if len(full_name.split(" ")) > 2 or given_name == " " or family_name == " ":
        continue

      if given_name != given_name.title() or family_name != family_name.upper():
        print '\n%s %s -> %s %s (%s)' % (given_name, family_name, given_name.title(), family_name.upper(), full_name)

        given_name = given_name.title()
        family_name = family_name.upper()

        if not entry.name:
          entry.name = gdata.data.Name()

        entry.name.given_name = gdata.data.GivenName(text=given_name)
        entry.name.family_name = gdata.data.FamilyName(text=family_name)
        entry.name.full_name = gdata.data.FullName(text=given_name + " " + family_name)

        gd_client.Update(entry)

gd_client = create_client()

feed = gd_client.GetContacts()
while feed:
  update_contacts(gd_client, feed)

  next = feed.GetNextLink()
  if next:
    feed = gd_client.GetContacts(uri=next.href)
  else:
    feed = None