text: ####### Python 3.6
  ####### author: Rafael Calixto
  ####### created at: 08/26/2018
  ####### description: This library provide a web crawler to extract
  ####### informations from web pages.
  from urllib import request as r
  
  class Scraper():
      def __init__(self):
          self.headers = {}
          self.headers['User-Agent'] = '''Mozilla/5.0 (X11; Linux 1686)
          AppleWebKit/537.17 (KHTML, like Gecko)
          Chrome/24.0.1312.27 Safari/537.17'''.replace('\n','')
          self.err = None
          self.data = None
  
      def get_it(self, url):
          ### input: str
          ### output: str, str {error}
          try:
              self.data = r.urlopen(r.Request(url, headers = self.headers)).read()
          except Exception as e:
              self.err = 'Erro ao acessar a URL:' + url + '\n' + e
  
          return str(self.data), self.err
  