Here is one way recommended for Autodesk Maya 2018 to convert your PyQt ui files to python class code:
http://help.autodesk.com/view/MAYAUL/2018/ENU/?guid=GUID-FAD0F6CC-15D0-4489-9372-028146B70F49
Here is also tips for using PySide in Maya 2017:
http://help.autodesk.com/cloudhelp/2017/ENU/Maya/files/GUID-0617A132-1B57-474F-A656-6E71A002CA28.htm
http://help.autodesk.com/view/MAYAUL/2018/ENU/?guid=GUID-FAD0F6CC-15D0-4489-9372-028146B70F49
Here is also tips for using PySide in Maya 2017:
http://help.autodesk.com/cloudhelp/2017/ENU/Maya/files/GUID-0617A132-1B57-474F-A656-6E71A002CA28.htm