Google Play Review Scraper

reivew.py

import sys
import urllib
import urllib2
import json
import codecs

url = "https://play.google.com/store/getreviews"
values = { 
    "reviewType": "0", "pageNum": "2",
    "id":
    "com.com2us.soulcollector.normal.freefull.google.global.android.common",
    "reviewSortOrder": "2", "xhr": "1"
}


def load_review(page):
    values["pageNum"] = str(page)
    data = urllib.urlencode(values)
    req = urllib2.Request(url, data)
    response = urllib2.urlopen(req)
    jdata = response.read()
    page = json.loads(jdata[6:])
    try:
        review = page[0][2]
        return review
    except IndexError:
        return None


def main():
    page = 0 
    sysenc = sys.stdout.encoding
    while True:
        review = load_review(page)
        if review is None:
            break
        if sysenc == 'cp949':
            review = codecs.encode(review, sysenc, 'ignore')
        print review
        page += 1 


if __name__ == "__main__":
    main()

Do you have any idea what the reviewType argument is for? I don't seem to be able to figure out.