Lista todas as acoes da bovespa, delay de 15 minutos.

bovespa.py

from lxml import html
import requests

separator = '\t'
csv = open('stocks.csv', 'w+')

csv.write(
    'NAME' + separator
    +'DESC' + separator
    +'PRICE' + separator
    +'VAR\n')

for index in range(1,18):
    page = requests.get('http://exame.abril.com.br/mercados/cotacoes-bovespa/acoes?page=' + str(index))
    tree = html.fromstring(page.content)

    stocks = tree.xpath('//table[@id="stocks"]/tbody/tr')

    for row in stocks:
        data = row.xpath('./td')

        stockName = data[0].xpath('./a/text()')[0]
        stockDesc = data[0].xpath('./span/text()')[0]
        stockPrice = data[1].text_content().replace('.','').replace(',','.')
        stockDelta = data[2].text_content().replace('.','').replace(',','.')

        csv.write(
            stockName + separator
            +stockDesc + separator
            +stockPrice + separator
            +stockDelta + '\n'
        )