Python 3.7でRuntimeError: generator raised StopIteration

[xswqaz]

https://www.python.org/dev/peps/pep-0479/

ariblib/packet.py

    def __iter__(self):
        packet_size = self.PACKET_SIZE
        chunk_size = self.chunk_size
        buffer_size = packet_size * chunk_size
        packets = iter(lambda: self.read(buffer_size), b'')
        for packet in packets:
            for start, stop in zip(
                range(0, buffer_size - packet_size + 1, packet_size),
                range(packet_size, buffer_size + 1, packet_size)
            ):
                next = packet[start:stop]
                if not next:
                    raise StopIteration  <---
                yield next