Python: search-google.py

#!/usr/bin/env python2
# -*- coding: utf8 -*-

import sys
import time
import random
import argparse

from selenium import webdriver
from selenium.webdriver.support.ui import Select, WebDriverWait
from selenium.common.exceptions import NoSuchFrameException
from selenium.webdriver.common.keys import Keys

# If this script no longer fetches any results check the XPath

def parse_args():
    parser = argparse.ArgumentParser()
    parser.add_argument('-s', '--search', help='Enter the search term')
    parser.add_argument('-p', '--pages', default='1', help='Enter how many pages to scrape (1 page = 100 results)')
    return parser.parse_args()

def start_browser():
    br = webdriver.Firefox()
    br.implicitly_wait(10)
    return br

def get_ua():
    ua_list = ['Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.131 Safari/537.36',
               'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.131 Safari/537.36',
               'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.75.14 (KHTML, like Gecko) Version/7.0.3 Safari/537.75.14',
               'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0',
               'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.137 Safari/537.36',
               'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0']
    ua = random.choice(ua_list)
    return ua

def scrape_results(br):
    # Xpath will find a subnode of h3, a[@href] specifies that we only want <a> nodes with

# any href attribute that are subnodes of