self.cb.addItem("C++")
self.cb.addItems(["Java", "C#", "Python"])

def selectionchange(self,i):
   print "Items in the list are :"

   for count in range(self.cb.count()):
      print self.cb.itemText(count)
   print "Current index",i,"selection changed ",self.cb.currentText()

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class combodemo(QWidget):
   def __init__(self, parent = None):
      super(combodemo, self).__init__(parent)

      layout = QHBoxLayout()
      self.cb = QComboBox()
      self.cb.addItem("C")
      self.cb.addItem("C++")
      self.cb.addItems(["Java", "C#", "Python"])
      self.cb.currentIndexChanged.connect(self.selectionchange)

      layout.addWidget(self.cb)
      self.setLayout(layout)
      self.setWindowTitle("combo box demo")

   def selectionchange(self,i):
      print "Items in the list are :"

      for count in range(self.cb.count()):
         print self.cb.itemText(count)
      print "Current index",i,"selection changed ",self.cb.currentText()

def main():
   app = QApplication(sys.argv)
   ex = combodemo()
   ex.show()
   sys.exit(app.exec_())

if __name__ == '__main__':
   main()

C
C++
Java
C#
Python
Current selection index 4 selection changed Python