code: def connection_ok():
      
      try:
          urlopen(Dataset.base_url, timeout=1)
          # if an index page is ever added, this will pass through
          return True
      except HTTPError:
          # There's no index for BASE_URL so Error 404 is expected
          return True
      except URLError:
          # This is raised if there is no internet connection
          return False
docs: Check web connection.
      Returns True if web connection is OK, False otherwise.