#!/usr/bin/env python
# vim:fileencoding=utf-8
from __future__ import (unicode_literals, division, absolute_import,
                        print_function)
from PyQt5.Qt import QApplication, QComboBox, QDialog, QVBoxLayout

app = QApplication([])

c = QComboBox()
c.addItems(['one', 'two', 'three'])
c.activated.connect(print)
d = QDialog()
l = QVBoxLayout(d)
l.addWidget(c)
d.exec_()
del d
del app