google maps - Xpath for getting latitude and longitude -

i confused on how latitude , longitude values under "location" @ this url using 2 separate xpath's.

i using extract these 2 values coordinates of given zip code. coords.csv file empty when run "scrapy crawl latlng -o coords.csv -t csv" xpath or method have yielding coords must not correct

here code:

use googlemaps api find location given zip , extract latitude(lat) & longitude(lng) 'latlng' spider

zipcode = raw_input('zipcode: ') latlngurl = 'http://maps.googleapis.com/maps/api/geocode/json?address=%s' % (zipcode,) latitude = 35 longitude = -79  class coordinates(scrapy.item):     latitude = scrapy.field()     longitude = scrapy.field()  class latlngspider(scrapy.spider):     name = "latlng"     allowed_domains = ["googleapis.com"]     start_urls = (     latlngurl, )     def parse(self, response):         latitude = response.xpath('/geocoderesponse/result/geometry/location/lng').extract()         longitude = response.xpath('/geocoderesponse/result/geometry/location/lat').extract()     element in range(0, 2, 1):         coords = coordinates()         coords["latitude"] = latitude.pop(0)         coords["longitude"] = longitude.pop(0)         yield coords 

if meant post (http://maps.googleapis.com/maps/api/geocode/xml?address=27517) address instead of 1 linked, xpath be:

/geocoderesponse/result/geometry/location/lat 

and

/geocoderesponse/result/geometry/location/lng 

if want in json, it's different.