add page number

import  scrapy

class AuthorSpider(scrapy.Spider):

    name = "quotes"

    start_urls = [
        'http://quotes.toscrape.com/page/1/',

    ]



    page=0;





    def parse(self, response):
        quotes = response.css('div.quote')

        AuthorSpider.page +=1

        for quote in quotes:

            content = quote.css('span.text::text').get()
            author = quote.css('small.author::text').get()
            tags = quote.css('a.tag::text').getall()


            yield {

                'content' : content,
                'author' : author,
                'tags' : tags,

                'page' : AuthorSpider.page


            }

        next_page = response.css('li.next a::attr(href)').get()

        if next_page is not None:
            next_page = response.urljoin(next_page)
            yield scrapy.Request(next_page, callback=self.parse)