Just use the installer provided
- Install Python 3.3 or later
- Install sympy
- Install PyQt5
- Execute python/python3 pythoncad_qt.py (when in the pythoncad folder)
If something doesn't work plese call me at matteo.boscolo@boscolini.eu or go to the official web site http://sourceforge.net/projects/pythoncad/. Alternatively you can create an issue on the GitHub page of the PythonCAD3 project: https://github.com/Csega/PythonCAD3.