helper.py 文件源码

def _reporthook(blocknum, blocksize, totalsize):
    readsofar = blocknum * blocksize
    if totalsize > 0:
        percent = min(100, readsofar * 1e2 / totalsize)
        s = "\r%5.1f%% %*d / %d" % (
            percent, len(str(totalsize)), readsofar, totalsize)
        sys.stderr.write(s)
        # Near the end
        if readsofar >= totalsize:
            sys.stderr.write("\n")
    # Total size is unknown
    else:
        sys.stderr.write("\rRead %d" % (readsofar,))