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I've created window with button named "First", the window shows me next button named "Second" after clicking on the button "First", but button "Second" isn't moved by:

self.b2.move(50,50)
Whats the problem?
import sys
from PyQt5 import QtWidgets
class Window(QtWidgets.QMainWindow):
   def __init__(self):
       super().__init__()
       self.init_UI()
   def init_UI(self):
       self.Centr= QtWidgets.QWidget()
       self.setCentralWidget(self.Centr)
       self.window = QtWidgets.QStackedWidget(self.Centr)
       self.b1 = self.addButton()
       self.window.addWidget(self.b1)
       self.b2 = self.addButton_2()
       self.b2.move(50,50)
       self.window.addWidget(self.b2)
       self.b1.clicked.connect(self.b1_clk)
       self.currentStack(0)
       self.show()
   def addButton(self): 
       b1 = QtWidgets.QPushButton("First")
       return b1
   def addButton_2(self):  
       b2 = QtWidgets.QPushButton("Second")
       return b2
   def b1_clk(self):
       self.currentStack(1)
   def currentStack(self, index):
      self.window.setCurrentIndex(index)
app = QtWidgets.QApplication(sys.argv)
w = Window()
sys.exit(app.exec_())
Sorry for my English.
And thank you for your attention!
                Why do you want to place a button in the QStackedWidget? It is normal to place it inside the pages managed by the QStackedWidget.
– eyllanesc
                Apr 5, 2018 at 8:17
                Thank you! But how can I move button in window? I'm trying by self.window.b2.move(50,50) after adding button into window widget and catch: 'QStackedWidget' object has no attribute 'b2'
– Artem Getmanskiy
                Apr 5, 2018 at 8:28
                Will it better tactic to add all buttons in different CentralWidget, then add all CentralWidget in QStackedWidget and managing its by QStackedWidget methods?
– Artem Getmanskiy
                Apr 5, 2018 at 8:37
                @ArtemGetmanskiy You generally shouldn't be using the move command.  Very few widgets are hard positioned.  People generally use QLayouts and spacers to position their widgets.  You should probably add a QWidget to the stacked widget and position the button inside that with a layout and some spacer items.
– Brendan Abel
                Apr 5, 2018 at 17:08
        
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