Echoplex

import sys
from PyQt4 import QtGui, QtCore
from ui import Ui_Dialog as Dlg

class Window(QtGui.QDialog, Dlg):
  def __init__(self):
    QtGui.QDialog.__init__(self)
    self.setupUi(self)
    self.connect(self.pushButton,
                 QtCore.SIGNAL("clicked()"), self.onSpeichern)
  def onSpeichern(self):
    f = open('save.txt', 'w')
    f = self.textEdit.toPlainText()
    f.close()
app = QtGui.QApplication(sys.argv)
dialog = Window()
dialog.show()
sys.exit(app.exec_())