PyQt5: QVBoxLayout: how to make three buttons as a group?

So I have made a simple PyQt5 application with a QVBoxLayout. Obviously, each button I add stretches out from one end to another and they all stack on on top of each other. How can I add buttons to QVBoxLayout that would be a group of three small buttons on my screen?

So you need a QHBoxLayout for your buttons, nested in a QVBoxLayout:

class Main(QMainWindow):
    def __init__(self, parent=None):
        super(Main, self).__init__(parent)
        self.centralWidget = QWidget()
        self.setCentralWidget(self.centralWidget)

        self.vLayout = QVBoxLayout(self.centralWidget)

        self.buttonsWidget = QWidget()
        self.buttonsWidgetLayout = QHBoxLayout(self.buttonsWidget)
        self.buttons = [QPushButton(c) for c in 'ABC']
        for button in self.buttons:
            self.buttonsWidgetLayout.addWidget(button)

        self.placeHolder = QWidget()
        self.placeHolder.setMinimumWidth(480)
        self.placeHolder.setMinimumHeight(320)
        self.placeHolder.setStyleSheet('* {background: red;}')

        self.vLayout.addWidget(self.placeHolder)
        self.vLayout.addWidget(self.buttonsWidget)