mouse click event prob

import sys, os

import Qt
from Qt.QtCore import *
from Qt.QtGui import *
from Qt.QtWidgets import *


class RButton(QPushButton):
    """
    """
    rclicked = Signal()

    def __init__(self, parent=None, name='Button'):
        """
        """
        super(RButton, self).__init__(parent=parent)
        self.setText(name)


    def mousePressEvent(self, e):
        if e.type() == QEvent.MouseButtonPress:
            if e.button() == Qt.RightButton:
                self.rclicked.emit()
                e.accept()
            else:
                super(QPushButton, self).mousePressEvent(e)








def clicked():
    print('clicked')
def rclicked():
    print('rclicked')

def show():
    app = QApplication(sys.argv)
    win = QWidget(None)
    lay = QVBoxLayout(win)
    #
    b = RButton(win, 'Derived')
    lay.addWidget(b)
    b.clicked.connect(clicked)
    b.rclicked.connect(rclicked)
    #
    b2 = QPushButton(win)
    b2.setText('QPushButton')
    lay.addWidget(b2)
    b2.clicked.connect(clicked)
    #
    win.show()
    app.exec_()


if __name__ == "__main__":
    show()