import bs4, requests

def getAmazonPrice(productUrl):
        req = requests.get(productUrl)

        try:
                req.raise_for_status()
        except:
                return None

        soup = bs4.BeautifulSoup(req.text,'html.parser')
        elem = soup.select('#unqualifiedBuyBox > div:nth-of-type(1) > div:nth-of-type(1) > span:nth-of-type(2)')
        assert len(elem) >= 1

        return elem[0].text.strip()

price = getAmazonPrice('https://www.amazon.com.br/TABLET-SAMSUNG-TAB-T585-16GB/dp/B01G4618ZY/ref=sr_1_1?s=computers&ie=UTF8&qid=1516316045&sr=1-1')

print('The price is: '+price)