Basit pyside uygulamasi

pencerem.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Dialog</class>
 <widget class="QDialog" name="Dialog">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Dialog</string>
  </property>
  <widget class="QLineEdit" name="lineEdit">
   <property name="geometry">
    <rect>
     <x>20</x>
     <y>60</y>
     <width>113</width>
     <height>27</height>
    </rect>
   </property>
  </widget>
  <widget class="QLineEdit" name="lineEdit_2">
   <property name="geometry">
    <rect>
     <x>220</x>
     <y>60</y>
     <width>113</width>
     <height>27</height>
    </rect>
   </property>
  </widget>
  <widget class="QLineEdit" name="lineEdit_3">
   <property name="geometry">
    <rect>
     <x>140</x>
     <y>170</y>
     <width>113</width>
     <height>27</height>
    </rect>
   </property>
   <property name="readOnly">
    <bool>true</bool>
   </property>
  </widget>
 </widget>
 <resources/>
 <connections>
  <connection>
   <sender>lineEdit</sender>
   <signal>textChanged(QString)</signal>
   <receiver>Dialog</receiver>
   <slot>degisim()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>66</x>
     <y>78</y>
    </hint>
    <hint type="destinationlabel">
     <x>67</x>
     <y>109</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>lineEdit_2</sender>
   <signal>textChanged(QString)</signal>
   <receiver>Dialog</receiver>
   <slot>degisim()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>244</x>
     <y>79</y>
    </hint>
    <hint type="destinationlabel">
     <x>245</x>
     <y>110</y>
    </hint>
   </hints>
  </connection>
 </connections>
 <slots>
  <slot>degisim()</slot>
 </slots>
</ui>

ui_pencerem.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'pencerem.ui'
#
# Created: Tue Jun  5 10:59:37 2018
#      by: pyside-uic 0.2.15 running on PySide 1.2.2
#
# WARNING! All changes made in this file will be lost!

from PySide import QtCore, QtGui

class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(400, 300)
        self.lineEdit = QtGui.QLineEdit(Dialog)
        self.lineEdit.setGeometry(QtCore.QRect(20, 60, 113, 27))
        self.lineEdit.setObjectName("lineEdit")
        self.lineEdit_2 = QtGui.QLineEdit(Dialog)
        self.lineEdit_2.setGeometry(QtCore.QRect(220, 60, 113, 27))
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.lineEdit_3 = QtGui.QLineEdit(Dialog)
        self.lineEdit_3.setGeometry(QtCore.QRect(140, 170, 113, 27))
        self.lineEdit_3.setReadOnly(True)
        self.lineEdit_3.setObjectName("lineEdit_3")

        self.retranslateUi(Dialog)
        QtCore.QObject.connect(self.lineEdit, QtCore.SIGNAL("textChanged(QString)"), Dialog.degisim)
        QtCore.QObject.connect(self.lineEdit_2, QtCore.SIGNAL("textChanged(QString)"), Dialog.degisim)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        Dialog.setWindowTitle(QtGui.QApplication.translate("Dialog", "Dialog", None, QtGui.QApplication.UnicodeUTF8))

uygulama.py

from PySide.QtGui import *
from ui_pencerem import Ui_Dialog
import sys

class MainWindow(QDialog, Ui_Dialog):
    def __init__(self, app=None):
        super(MainWindow, self).__init__()
        self.app = app
        self.setupUi(self)
        self.show()

    def degisim(self):
        self.lineEdit_3.setText(self.lineEdit.text() + " " + self.lineEdit_2.text())
        


def main():
    app = QApplication(sys.argv)
    mainWin = MainWindow(app)
    ret = app.exec_()
    app.exit()
    sys.exit(ret)


if __name__ == "__main__":
    main()