[PyQt] Qtableview adapte size to

[WBPYTHON]

Thank you (again) for your help. When executing your code, it displays the Qtableview in another window.
And I also have this error message in terminal.

Error:
QLayout: Attempting to add QLayout "" to Window1 "", which already has a layout

Window1 is the name of my MainWindow class :

 class Window1(QMainWindow):
    
    def __init__(self):
        super().__init__()
        
        self.initUI()
        
               
    def initUI(self):  

You are right, I plan to add stuff in the bottom but what if I don't want the other widgets to fit with main window ? they will be hidden by Qtableview ? And if it put a Qframe, that I add to layout manager, since I don't add geometry, will it share the place equaly with the tableview ?