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python 2.7 - Scrapy get request url in parse

How can I get the request url in Scrapy's parse() function? I have a lot of urls in start_urls and some of them redirect my spider to homepage and as result I have an empty item. So I need something like item['start_url'] = request.url to store these urls. I'm using the BaseSpider.

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The 'response' variable that's passed to parse() has the info you want. You shouldn't need to override anything.

eg. (EDITED)

def parse(self, response):
    print "URL: " + response.request.url

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