for u in uuids:
    url = "https://site.com/%s" % u
    r = requests.get(url, stream=True,  verify=False, allow_redirects=True,auth=(user,password))
    d = r.headers['content-disposition']
    fname = re.findall("filename=\"(.+)\"", d)[0]

    if Path(fname).is_file():
        resume_byte_pos = Path(fname).stat().st_size
        resume_header = {'Range': 'bytes=%d-' % resume_byte_pos}
        r.headers.update(resume_header)
        total_size = int(r.headers.get('content-length', 0));
        wrote = 0
        with open(fname, 'ab') as f:
            for data in tqdm_notebook(r.iter_content(block_size), total=math.ceil(total_size//block_size) , unit='KB', unit_scale=True):
                wrote = wrote  + len(data)
                f.write(data)
            if total_size != 0 and wrote != total_size:
                print("ERROR, something went wrong")
    else:
        resume_header = {'Range': 'bytes=0'}
        r.headers.update(resume_header)
        total_size = int(r.headers.get('content-length', 0));
        wrote = 0
        with open(fname, 'wb') as f:
            for data in tqdm_notebook(r.iter_content(block_size), total=math.ceil(total_size//block_size) , unit='KB', unit_scale=True):
                wrote = wrote  + len(data)
                f.write(data)
            if total_size != 0 and wrote != total_size:
                print("ERROR, something went wrong")