pyqt5 layout

[Axel_Erfurt]

self.build_dt = BuildDateTime()

and set it as Widget in mainWindow

self.setCentralWidget(self.build_dt)

from PyQt5.QtCore import (QDate, QTime, Qt, QTimer)
from PyQt5.QtGui import QFont
from PyQt5.QtWidgets import (QApplication, QMainWindow, QLabel, QWidget)
import sys
 
font = "Arial"
color = "antiquewhite"
style_sheet = f"color: {color} ;"
 
 
class BuildDateTime(QWidget):
    def __init__(self):
        super().__init__()
 
        update = QTimer(self)
        update.timeout.connect(self.show_ui)
        update.start(1000)
        # The Time
        self.time = QLabel(self)
        self.time.setGeometry(0, 85, 400, 75)
        self.time.setStyleSheet(style_sheet)
        self.time.setFont(QFont(font, 60))
        # The Date
        self.date = QLabel(self)
        self.date.setGeometry(0, 25, 700, 50)
        self.date.setStyleSheet(style_sheet)
        self.date.setFont(QFont(font, 30))
 
    def show_ui(self):
        # Time
        get_time = QTime.currentTime()
        time_string = get_time.toString(Qt.DefaultLocaleShortDate)
        self.time.setText(time_string)
        # Date
        now = QDate.currentDate()
        date_string = now.toString(Qt.DefaultLocaleLongDate)
        self.date.setText(date_string)
 
class Window(QMainWindow):
    def __init__(self):
        super().__init__()
 
        self.build_dt = BuildDateTime()
        self.setCentralWidget(self.build_dt)
        self.setGeometry(200, 200, 500, 200)
        #self.show()
        self.showFullScreen()
        self.setStyleSheet("background-color: black;")
 
    def keyPressEvent(self, e):
        if e.key() == Qt.Key_Escape:
            self.close()
        if e.key() == Qt.Key_F11:
            if self.isMaximized():
                self.showNormal()
            else:
                self.showMaximized()

 
if __name__ == '__main__':
    # create pyqt5 app
    App = QApplication(sys.argv)
    # create the instance of our Window
    window = Window()
    # showing all the widgets
    window.show()
    # start the app
    App.exit(App.exec_())