The problem is due to the upgrade of python3 from 3.6 to 3.7 version. In line 81 of /usr/share/pyzo/pyzo/yoton/clientserver.py, there is: def __init__(self, address, async=False, verbose=0): which is not possible anymore as async is now a reserved name.
A simple solution: change async to another name (e.g. asyn) in this line and in the line it is used (line 85): self._async = async This simple modification solves the problem and enable to correctly finish the installation of all updated python3 packages. As far as I could try, pyzo can also be launched (but I have not tested it thoroughly, so there may be other similar bugs somewhere else in the code). Raphaël
