ftplib tqdm code example

Example: ftplib tqdm

with open(filename, 'wb') as fd:
    total = ftpclient.size(filename)

    with tqdm(total=total) as pbar:
        def callback_(data):
            l = len(data)
            pbar.update(l)
            fd.write(data)

        ftpclient.retrbinary('RETR {}'.format(filename), callback_)