Rewrites of geoGrab() and massPlaceFind() from MLIA Ch10.

""" geoGrab() and massPlaceFind() from Machine Learning in Action Chapter 10.

    Seems as though the book versions were not working I wrote versions
    using YQL that parses the returned XML for the latitudes and longitudes.
    After all I wouldn't want to miss out on Drew's Pubcrawl :)
                          --lolamontes69
"""

import urllib2 as urllib2
import xml.etree.ElementTree as ET
from time import sleep

def geoGrab(address):
    apiStem = 'http://query.yahooapis.com/v1/public/yql?q='
    apiStem1 = 'select%20*%20from%20geo.placefinder%20where%20text="'
    apiTail = '"'
    address = address.replace(' ','%20')
    url = apiStem+apiStem1+address+apiTail
    print url
    geoxml = urllib2.urlopen(url)
    tree = ET.parse(geoxml)
    root = tree.getroot()
    latitude = (root[0][0].find('latitude')).text
    longitude = (root[0][0].find('longitude')).text
    print float(latitude),float(longitude)
    return float(latitude),float(longitude)

def massPlaceFind(fileName):
    fw = open('places.txt', 'w')
    for line in open(fileName).readlines():
        line = line.strip()
        line1 = line.split('\t')
        lineArr = ' '.join(line1[1:])
        try: latt,lng = geoGrab(lineArr)
        except: pass
        try:
            print "%s\t%f\t%f" % (lineArr, latt, lng)
            fw.write('%s\t%f\t%f\n' % (line, latt, lng))
        except: print "error fetching"
        sleep(1)
    fw.close()

if __name__ == "__main__":
    massPlaceFind("portlandClubs.txt")