Message 209151 - Python tracker

Is there any reason why unconsumed_tail needs to be exposted?

I would suggest to instead introduce a boolean attribute data_ready than indicates that more decompressed data can be provided without additional compressed input.

Example:

# decomp = decompressor object
# infh = compressed input stream
# outfh = decompressed output stream
while not decomp.eof:
    if decomp.data_ready:
        buf = decomp.decompress(max_size=BUFSIZE)
        # or maybe:
        #buf = decomp.decompress(b'', max_size=BUFSIZE)
    else:
        buf = infh.read(BUFSIZE)
        if not buf:
            raise RuntimeError('Unexpected end of compressed stream')
        buf = decomp.decompress(buf, max_size=BUFSIZE)

    assert len(buf) > 0
    outfh.write(buf)

This is short, easily readable (in my opinion) and also avoids the problem where the decompressor blocks because it needs more data even though there still is an unconsumed tail.