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# -*- coding: utf-8 -*-
 
import sys
 
from PyQt4 import QtCore, QtGui
 
class Mywindow(QtGui.QWidget):
 
    def __init__(self):
        super(Mywindow, self).__init__()
        btn = QtGui.QPushButton('Button', self)
        btn.resize(btn.sizeHint())
        btn.move(10, 10)
        self.setGeometry(300, 300, 250, 150)
 
        self.setFocusPolicy(QtCore.Qt.StrongFocus)
        self.show()
 
    def focusInEvent(self, event):
        print 'Widget has focus:', self.hasFocus()
        print 'Reason:', event.reason()
 
    def focusOutEvent(self, event):
        print 'Widget has focus:', self.hasFocus()
        print 'Reason:', event.reason()
 
 
def main():
    app = QtGui.QApplication(sys.argv)
    win = Mywindow()
    sys.exit(app.exec_())
 
if __name__ == '__main__':
    main() | 
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