from PyQt5.QtWidgets import QApplication, QVBoxLayout, QWidget
from pyqt_responsive_label import ResponsiveLabel


class Widget(QWidget):
    def __init__(self):
        super().__init__()
        self.__initUi()

    def __initUi(self):
        responsiveLabel = ResponsiveLabel(self)
        responsiveLabel.setText('ABC')

        lay = QVBoxLayout()
        lay.addWidget(responsiveLabel)

        self.setMinimumSize(responsiveLabel.sizeHint())
        self.setLayout(lay)


if __name__ == "__main__":
    import sys

    app = QApplication(sys.argv)
    widget = Widget()
    widget.show()
    app.exec_()