Downloads a single image from Google Search results to `label_path`
    given an `img_tuple` that contains `(fname, url)` of an image to download.
    `i` is just an iteration number `int`.

def _download_single_image(label_path:Path, img_tuple:tuple, i:int, timeout:int=4) -> None:
    """
    Downloads a single image from Google Search results to `label_path`
    given an `img_tuple` that contains `(fname, url)` of an image to download.
    `i` is just an iteration number `int`. 
    """
    suffix = re.findall(r'\.\w+?(?=(?:\?|$))', img_tuple[1])
    suffix = suffix[0].lower() if len(suffix)>0  else '.jpg'
    fname = f"{i:08d}{suffix}"
    download_url(img_tuple[1], label_path/fname, timeout=timeout)