pip3 install pyqt5 # propably already installed
sudo apt-get install python3-pyqt5 # probably already installed aswell
sudo apt-get install pyqt5-dev-tools # code generator, ...
sudo apt-get install qttools5-dev-tools # qt development tools (assistant, designer, linguist)
Create file /usr/lib/qt5/bin/uic
#!/usr/bin/env python3
import subprocess
import sys
child = subprocess.Popen(['pyuic5' ,'-x',sys.argv[1]],stdout=subprocess.PIPE)
print(str(child.communicate()[0],encoding='utf-8'))
$ sudo chmod +x /usr/lib/qt5/bin/uic