download_progress.py

import os

def download(file, source, target):
    size = int(source.info().getheaders('Content-Length')[0])
    print('Downloading {}, Size: {:,d}'.format(file, size))
    downloaded = 0
    block = 65536
    timer = [time.time, time.clock][os.name == 'nt']
    start = timer()
    while True:
        buf = source.read(block)
        if not buf:
            break
        downloaded += len(buf)
        target.write(buf)
        print '{:15,d} [{:6.2f}%] {:9.2f} kB/s\r'.format(
                    downloaded, downloaded * 100. / size,
                    downloaded / 1024. / (timer() - start)),
    print '{:15,d} [100.00%]'.format(downloaded)
    source.close()