code: def stock_image(width: Union[int, str] = 1920,
                      height: Union[int, str] = 1080,
                      keywords: Optional[List[str]] = None,
                      writable: bool = False) -> Union[str, bytes]:
          
          api = 'https://source.unsplash.com/{}x{}?{}'
  
          if keywords is not None:
              keywords_str = ','.join(keywords)
          else:
              keywords_str = ''
  
          url = api.format(width, height, keywords_str)
  
          try:
              response = urllib.request.urlopen(url)
              if writable:
                  return response.read()
              url = response.geturl()
              return url
          except urllib.error.URLError:
              raise urllib.error.URLError(
                  'Required an active HTTP connection')
docs: Generate random stock image (JPEG) hosted on Unsplash.
  
          .. note:: This method required an active HTTP connection.
  
          :param width: Width of the image.
          :param height: Height of the image.
          :param keywords: List of search keywords.
          :param writable: Return image as sequence ob bytes.
          :return: Link to the image.