How to extract the rating of a movie from imdb using scrapy in python

xpath
scraping
python
#1

Hello,

I am using scrapy to extract data about a movie from imdb. However the rating is contained within:

My code for extracting the ratings using scrapy is:

from scrapy.spiders import Spider
from scrapy.selector import Selector
from imdb.items import ImdbItem


class ImdbSpider(Spider):
    name = "imdb"
    allowed_domains = ["imdb.com"]
    start_urls = [
        "http://www.imdb.com/title/tt0068646/reviews?ref_=%20best",
        
    ]

    def parse(self, response):
        sel = Selector(response)
        #ratings = sel.xpath('//[@id="tn15content"]/div/img')
        ratings = sel.xpath('//div[contains(@id,"tn15content")]/div/img')
	items = []

        for rating in ratings:
            item = ImdbItem()
	    item['rating'] = rating.xpath('/@alt').extract()
            items.append(item)	
	
	return items

However nothing is being returned but there is no error.

Pasted image914x628 161 KB

Also the stored csv feed count is being showed as 10 which is the number of reviews in a single page however the csv file is empty.
I am not being able to understand how to extract the 10/10 figure from within the img tag.
Can someone please help me with this??