old_contents: # coding: utf-8
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  from PyQt4 import QtGui
  from PyQt4.QtCore import pyqtSlot
  from .ui.main import Ui_MainWindow
  from .ui.about import Ui_AboutDialog
  
  
  class MainWindow(QtGui.QMainWindow, Ui_MainWindow):
      def __init__(self):
          QtGui.QMainWindow.__init__(self)
          self.setupUi(self)
  
      @pyqtSlot()
      def on_actionExit_triggered(self):
          QtGui.qApp.quit()
  
      @pyqtSlot()
      def on_btnBrowseInput_clicked(self):
          files = QtGui.QFileDialog.getOpenFileNames(self, "ファイルを開く")
          self.lineInput.setText(files.join(";"))
  
      @pyqtSlot()
      def on_btnBrowseOutput_clicked(self):
          folder = QtGui.QFileDialog.getExistingDirectory(self, "フォルダを開く")
          self.lineOutput.setText(folder)
  
  
  def main():
      import sys
  
      app = QtGui.QApplication(sys.argv)
      win = MainWindow()
      win.show()
      sys.exit(app.exec_())
  
  
  if __name__ == '__main__':
      main()
  
new_contents: # coding: utf-8
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  from PyQt4 import QtGui
  from PyQt4.QtCore import pyqtSlot
  from .ui.main import Ui_MainWindow
  from .ui.about import Ui_AboutDialog
  
  class AboutDialog(QtGui.QDialog, Ui_AboutDialog):
      def __init__(self):
          QtGui.QDialog.__init__(self)
          self.setupUi(self)
  
  
  class MainWindow(QtGui.QMainWindow, Ui_MainWindow):
      def __init__(self):
          QtGui.QMainWindow.__init__(self)
          self.setupUi(self)
  
      @pyqtSlot()
      def on_actionExit_triggered(self):
          QtGui.qApp.quit()
  
      @pyqtSlot()
      def on_btnBrowseInput_clicked(self):
          files = QtGui.QFileDialog.getOpenFileNames(self, "ファイルを開く")
          self.lineInput.setText(files.join(";"))
  
      @pyqtSlot()
      def on_btnBrowseOutput_clicked(self):
          folder = QtGui.QFileDialog.getExistingDirectory(self, "フォルダを開く")
          self.lineOutput.setText(folder)
  
  
  def main():
      import sys
  
      app = QtGui.QApplication(sys.argv)
      win = MainWindow()
      win.show()
      sys.exit(app.exec_())
  
  
  if __name__ == '__main__':
      main()
  
subject: add placeholder code for the about dialog