Can´t integrate QTabWidget into a Layout besides other one´s

Hi together,

i´m new to Python and am stuck with a problem where I can´t find a solution.
Perhaps (or nearly sure) the problem exists just between the Headset ^^

I´m trying to (actually still as an exercise) create a Layout in PyQt5 and trying to implement
different Layouts into 1 QHBoxLayout.
Everything works fine, but I am not able to integrate a QTabWidget beside other Layouts.
When I´m trying to do so, it´s getting the only Layout on the surface as if no other one´s would have been implemented.

Here´s my code :

def createLayout(self):
    
    ############ LayoutTests #############################
         
    HLayout1 = QtWidgets.QHBoxLayout()
    VLayout1 = QtWidgets.QVBoxLayout()
    VLayout2 = QtWidgets.QVBoxLayout()
    VLayout3 = QtWidgets.QVBoxLayout()
    VLayout4 = QtWidgets.QVBoxLayout()
    VLayout5 = QtWidgets.QVBoxLayout()
    HLayout2 = QtWidgets.QHBoxLayout()
    
    GridLayout = QtWidgets.QGridLayout()
    StackedLayout = QtWidgets.QStackedLayout()
    TabWidget = QtWidgets.QTabWidget()
    
    VLayout1.addWidget(Color("black"))
    VLayout1.addWidget(Color("red"))
    VLayout1.addWidget(Color("yellow"))
    
    VLayout1.setContentsMargins(0,0,20,0)
    VLayout1.setSpacing(20)
    
    HLayout1.addLayout(VLayout1)
    
    HLayout1.addWidget(Color("green"))
    
    
    VLayout2.addWidget(Color("blue"))
    VLayout2.addWidget(Color("purple"))
    
    HLayout1.addLayout(VLayout2)
    
    
    GridLayout.addWidget(Color("Grey"), 0, 3)
    GridLayout.addWidget(Color("black"), 1, 0)                
    GridLayout.addWidget(Color("DarkGrey"), 1, 1)
    GridLayout.addWidget(Color("orange"), 2, 1)                     
    
    HLayout1.addLayout(GridLayout)
    
    
    TabWidget.setDocumentMode(False)
    TabWidget.setTabPosition(QtWidgets.QTabWidget.North)
    TabWidget.setMovable(True)

    Tab1 = QtWidgets.QWidget()
    Tab2 = QtWidgets.QWidget()
    
    TabWidget.addTab(Tab1, "Tab1") 
    TabWidget.addTab(Tab2, "Tab2") 
    
    VLayout3.addWidget(TabWidget)       

    **# here´s the Problem beginning, whenever I want to integrate the VLayout3 **
   ** # into the HLayout1 it´s getting the one and only ** 

    ** #HLayout1.addLayout(VLayout3) **
        
    Widget = QtWidgets.QWidget()
    Widget.setLayout(HLayout1)
    self.setCentralWidget(Widget)

This is the Layout before and after :

When activating again the Line "HLayout1.addLayout(VLayout3) " it´s getting the only one that´s visible.

I don´t understand why it´s getting dominant as the only one.
Isn´t it possible to have a QTabWidget in a Layout besides other Layouts ?

I´ll answer it for myself :wink:

I managed to get it running.

Obvisously it´s just possible to add a QTabWidget inside a GroupBox.
So, GroupBoxes besides GroupBoxes where the QTabWindow is inside is possible.
Without the GroupBoxes it´s becoming dominant like a Borg.