A script to extract cities in which hyundai's workshops are available

hyundai.py

'''
Copyright (c) 2016 Vikas Yadav

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
'''
import requests
import re

URL = 'http://www.customercare.hyundai.co.in/HyundaiGoogleMap.aspx'
VIEWSTATE = ""
EVENTVALIDATION = ""

def get_states():
    global VIEWSTATE, EVENTVALIDATION
    # Do the request
    html = requests.get(URL).text
    # Update the state variables
    VIEWSTATE = get_view_state(html)
    EVENTVALIDATION = get_event_validation(html)
    pattern = '<option value=(.*)?>(.*)</option>'
    results = re.finditer(pattern, html)
    states = {}
    for result in results:
        code = result.groups()[0].strip('"')
        if "-" not in code:
            #print code, result.groups()[1]
            states[code] = result.groups()[1]
    return states

def parse_options(html):
    pattern = '<option value=.*?>(.*)</option>'
    results = re.findall(pattern, html)
    return results

def get_cities(state_id):
    parameters = {"__VIEWSTATE" : VIEWSTATE, "__EVENTVALIDATION" : EVENTVALIDATION, "ddlState" : state_id}
    html = requests.post(URL, data=parameters).text
    options = re.findall('<select .*?>(.*?)</select>', html, re.DOTALL)
    #print "Printing Cities Here"
    return parse_options(options[1])

def get_view_state(html):
    pattern = '<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="(.*)" />'
    result = re.search(pattern, html)
    return result.groups()[0]

def get_event_validation(html):
    pattern = '<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="(.*)" />'
    result = re.search(pattern, html)
    print result.groups()[0]
    return result.groups()[0]

# Main Starts here 
s = get_states()
f = open("locations.csv", "w")
print "City,State"
f.write("City,State\n")
for key, value in s.items():
    c = get_cities(key)
    print "Cities in", value
    for city in c:
        print city+","+value
        f.write(city+","+value+"\n")
f.close()