try: import zlib import io except ImportError: print("SKIP") raise SystemExit try: zlib.decompIO except AttributeError: print("SKIP") raise SystemExit # Raw DEFLATE bitstream buf = io.BytesIO(b"\xcbH\xcd\xc9\xc9\x07\x00") inp = zlib.DecompIO(buf, -8) print(buf.seek(0, 1)) print(inp.read(1)) print(buf.seek(0, 1)) print(inp.read(2)) print(inp.read()) print(buf.seek(0, 1)) print(inp.read(1)) print(inp.read()) print(buf.seek(0, 1)) # zlib bitstream (with 256 byte window size) inp = zlib.DecompIO(io.BytesIO(b"\x08\x9930\xa0=\x00\x00\xb3q\x12\xc1")) print(inp.read(10)) print(inp.read()) # zlib bitstream, wrong checksum inp = zlib.DecompIO(io.BytesIO(b"\x08\x9930\xa0=\x00\x00\xb3q\x12\xc0")) try: print(inp.read()) except OSError as e: print(repr(e))