None != None; pyside2 internally uses wrong "None".

In [1]: import PySide2.QtWidgets                                                                                     
In [2]: PySide2.__version__                                                                                          
Out[2]: '5.6.0~a1'
In [3]: PySide2.QtWidgets.qApp                                                                                       
Out[3]: None
In [4]: id(PySide2.QtWidgets.qApp)                                                                                   
Out[4]: 140515700103744                                                                                                         
In [5]: id(None)                                                                                                     
Out[5]: 94436718787216