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import sys

from PySide6.QtGui import QIcon
from PySide6.QtWidgets import QApplication, QMainWindow, QPushButton, QWidget, \ 
    QGridLayout, QLCDNumber, QSizePolicy, QLayoutItem, QLabel


class MyWindow(QMainWindow):

    def __init__(self):
        super().__init__()
        self.setWindowTitle("Super Calculator V0.1")
        self.setWindowIcon(QIcon("icons/yes.png"))
        self.resize(500, 500)
        self.setStyleSheet("background: #333333; border: 10px solid #333333;")

        central_widget = QWidget()
        self.setCentralWidget(central_widget)

        grid = QGridLayout()             # l, c, h, w
        screen = QLCDNumber()
        grid.addWidget(screen, 0, 0, 1, 4)

        grid.addWidget(QPushButton("MC"), 1, 0)
        grid.addWidget(QPushButton("M+"), 1, 1)
        grid.addWidget(QPushButton("/"), 1, 2)
        grid.addWidget(QPushButton("*"), 1, 3)

        grid.addWidget(QPushButton("7"), 2, 0)
        grid.addWidget(QPushButton("8"), 2, 1)
        grid.addWidget(QPushButton("9"), 2, 2)
        grid.addWidget(QPushButton("-"), 2, 3)

        grid.addWidget(QPushButton("4"), 3, 0)
        grid.addWidget(QPushButton("5"), 3, 1)
        grid.addWidget(QPushButton("6"), 3, 2)
        grid.addWidget(QPushButton("+"), 3, 3)

        one_button = QPushButton("1")
        grid.addWidget(one_button, 4, 0)
        two_button = QPushButton("2")
        grid.addWidget(two_button, 4, 1)
        three_button = QPushButton("3")
        grid.addWidget(three_button, 4, 2)
        equal_button = QPushButton("=")
        grid.addWidget(equal_button, 4, 3, 2, 1)

        grid.addWidget(QPushButton("0"), 5, 0, 1, 2)
        grid.addWidget(QPushButton("."), 5, 2)

        for line in range(6):
            grid.setRowStretch(line, 2 if line == 0 else 1)

        for idx in range(grid.count()):
            item: QLayoutItem = grid.itemAt(idx)
            widget = item.widget()
            widget.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
            if isinstance(widget, QPushButton):
                widget.setStyleSheet("background: #595959; color: white; font-weight: bold; font-size: 20px")
            else:
                widget.setStyleSheet("background: #a2af77; font-weight: bold")

        equal_button.setStyleSheet("background: #f05a2D; font-weight: bold; font-size: 20px; color: white;")

        central_widget.setLayout(grid)


if __name__ == "__main__":
    app = QApplication(sys.argv)

    myWindow = MyWindow()
    myWindow.show()

    sys.exit(app.exec())