Added main interface of program

main_window.py

@@ -0,0 +1,62 @@
+from PyQt4 import QtGui,QtCore
+from registration_window import RegistrationWindow
+from attendance_window import AttendanceWindow
+
+class MainWindow(QtGui.QMainWindow):
+    #Main Window of Interface
+    def __init__(self):
+        super(MainWindow, self).__init__()
+        self._registration_window = None
+        self._attendance_window = None
+        self.setGeometry(300,50,800,600)
+        self.setWindowTitle("Automated Attendance System")
+        self.setWindowIcon(QtGui.QIcon('other_images/logo.png'))
+
+        #Heading
+        h=QtGui.QLabel(self)
+        h.setAlignment(QtCore.Qt.AlignCenter)
+        h.setGeometry(QtCore.QRect(100,30,600,60))
+        h.setStyleSheet("QLabel { background-color : blue;color :white ; }")
+        font=QtGui.QFont("Times",20,QtGui.QFont.Bold)
+        h.setFont(font)
+        h.setText("AUTOMATED ATTENDANCE SYSTEM")
+
+        #Registration Button for opening registration window
+        b1=QtGui.QPushButton(self)
+        b1.setText("REGISTRATION")
+        font1=QtGui.QFont("Times",16,QtGui.QFont.Bold)
+        b1.setFont(font1)
+        b1.setGeometry(450,200,200,50)
+        b1.setStyleSheet("QPushButton { background-color : gray;color :black ; }")
+        b1.clicked.connect(self.create_registration_window)
+
+        #Attendance Button for opening attendance window
+        b2=QtGui.QPushButton(self)
+        b2.setText("ATTENDANCE")
+        b2.setFont(font1)
+        b2.setGeometry(450,350,200,50)
+        b2.setStyleSheet("QPushButton { background-color : gray;color :black ; }")
+        b2.clicked.connect(self.create_attendance_window)    
+
+        #Adding Logo of college 
+        pic =QtGui.QLabel(self)
+        pic.setGeometry(80,150,300,350)
+        pic.setPixmap(QtGui.QPixmap("other_images/logo.png"))
+
+    def create_registration_window(self):
+        #Function for opening Registration window
+        self._registration_window = RegistrationWindow()
+        self._registration_window.show()
+        self.close()
+
+    def create_attendance_window(self):
+        #Function for opening Attendance window
+        self._attendance_window = AttendanceWindow()
+        self._attendance_window.show()
+        self.close()
+
+if __name__ == '__main__':
+    app = QtGui.QApplication([])
+    gui = MainWindow()
+    gui.show()
+    app.exec_()