Cannot import name '_gi'
Thanks to a comment by Wilhelm, I found that the solution is:
sudo ln -s /usr/lib/python3/dist-packages/gi/_gi.cpython-{36m,37m}-x86_64-linux-gnu.so
This worked for me with Python 3.7 on Ubuntu.
This is an old issue, but if someone needs a quick solution , that doesn't imply changing the default Python versions anywhere, just:
sudo python3.6 /usr/bin/apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
These 2 steps may help you
$ cd /usr/lib/python3/dist-packages/gi
$ sudo ln -s _gi.cpython-{36m,37m}-x86_64-linux-gnu.so
Ubuntu does not like to switch its default interpreter away from python 3.7.
So switch it back to 3.6 by using
sudo update-alternatives --config python3
After that try to install the gi
package:
sudo apt install python3-gi