Failed To Start Cloud-init At Startup After Upgrading To Python 3.6

I've installed Python 3.6 instead of the default 3.5 release on a new cloud server (Ubuntu 16.04). After I restarted the server, I found that it failed to execute cloud-init at sta

Solution 1:

Finally I solved the problem by upgrading the jsonpatch package with pip.

$ pip3 install --upgrade jsonpatch

This is a known bug (compatibility issue) on an old version of jsonpatch (see https://github.com/stefankoegl/python-json-patch/issues/56). I have to upgrade the package by pip instead of apt-get. This can fix both two errors.