variáveis e método p/ adicionar widgets no vlayout

aula202-calculadora/main.py

@@ -1,16 +1,21 @@
 import sys
 
 from main_window import MainWindow
-from PySide6.QtWidgets import QApplication, QLabel
+from PySide6.QtGui import QIcon
+from PySide6.QtWidgets import QApplication
+from variables import WINDOW_ICON_PATH
 
 if __name__ == '__main__':
+    # Cria a aplicação
     app = QApplication(sys.argv)
     window = MainWindow()
 
-    label1 = QLabel('O meu texto')
+    # Define o ícone
-    label1.setStyleSheet('font-size: 150px;')
+    icon = QIcon(str(WINDOW_ICON_PATH))
-    window.v_layout.addWidget(label1)
+    window.setWindowIcon(icon)
-    window.adjustFixedSize()
+    app.setWindowIcon(icon)
 
+    # Executa tudo
+    window.adjustFixedSize()
     window.show()
     app.exec()

aula202-calculadora/main_window.py

@@ -18,3 +18,6 @@ class MainWindow(QMainWindow):
         # Última coisa a ser feita
         self.adjustSize()
         self.setFixedSize(self.width(), self.height())
+
+    def addWidgetToVLayout(self, widget: QWidget):
+        self.v_layout.addWidget(widget)

aula202-calculadora/variables.py

@@ -0,0 +1,5 @@
+from pathlib import Path
+
+ROOT_DIR = Path(__file__).parent
+FILES_DIR = ROOT_DIR / 'files'
+WINDOW_ICON_PATH = FILES_DIR / 'icon.png'