Am Fri, 18 Jun 2021 10:42:58 +0100 schrieb Andrew Cooper : > This is a Py2 vs Py3 difference. This script is not ready for python 3. At a first glance it is the usual type confusion. It seems the type 'bytearray' exists in both variants. Perhaps stream_read() should return such an object, instead of either 'str' or 'bytes'. I'm sure there are more pitfalls. Olaf