Reloj digital con ícono hecho en PyQt5

from PyQt5.QtWidgets import (
    QApplication,
    QLCDNumber
)

from PyQt5.QtCore import (
    QTimer,
    QTime
)

from PyQt5.QtGui import QIcon

class Clock(QLCDNumber):

    def __init__(self, digits=8, parent=None):
        super(Clock, self).__init__(digits, parent)
        self.setWindowTitle("Reloj Digital")
        self.setWindowIcon(QIcon("mydigitalclock.png"))
        # Timer
        self.timer = QTimer()
        # Connect timer
        self.timer.timeout.connect(self._update)
        # Start
        self.timer.start(1000)

    def _update(self):
        """ Update display each one second"""

        time = QTime.currentTime().toString()
        self.display(time)


if __name__ == "__main__":
    import sys

    app = QApplication([])

    w = Clock()
    w.show()
    w.resize(300, 100)

    sys.exit(app.exec_())