pip install bp
importbpbp.encode(obj, encoding="utf-8", errors="strict") ->bytesbp.decode(buf, encoding="utf-8", errors="strict") ->objbp.pack(sequence, encoding="utf-8", errors="strict") ->bytesbp.unpack(buf, offset=0, num=0, encoding="utf-8", errors="strict") -> (used_bytes, obj, ...)