code: def run(self):
          
          chromedriver_dir = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'chromedriver_binary')
          chromedriver_filename = find_binary_in_path(get_chromedriver_filename())
          if chromedriver_filename:
              print("\nChromedriver already installed at {}...\n".format(chromedriver_filename))
              new_filename = os.path.join(chromedriver_dir, get_chromedriver_filename())
              self.copy_file(chromedriver_filename, new_filename)
          else:
              chromedriver_bin = get_chromedriver_filename()
              chromedriver_filename = os.path.join(chromedriver_dir, chromedriver_bin)
              if not os.path.isfile(chromedriver_filename):
                  print("\nDownloading Chromedriver...\n")
                  if not os.path.isdir(chromedriver_dir):
                      os.mkdir(chromedriver_dir)
                  url = get_chromedriver_url()
                  try:
                      response = urlopen(url)
                      if response.getcode() != 200:
                          raise URLError('Not Found')
                  except URLError:
                      raise RuntimeError('Failed to download chromedriver archive: {}'.format(url))
                  archive = BytesIO(response.read())
                  with zipfile.ZipFile(archive) as zip_file:
                      zip_file.extract(chromedriver_bin, chromedriver_dir)
              else:
                  print("\nChromedriver already installed at {}...\n".format(chromedriver_filename))
              if not os.access(chromedriver_filename, os.X_OK):
                  os.chmod(chromedriver_filename, 0o744)
          build_py.run(self)
docs: Downloads, unzips and installs chromedriver.
          If a chromedriver binary is found in PATH it will be copied, otherwise downloaded.