old_contents: from PyQt4 import QtGui, QtCore, QtDBus
  import sys
  import os
  from multiprocessing import Process
  
  class Lyrics(QtGui.QWidget):
      def __init__(self):
          super(Lyrics, self).__init__()
          self.initUI()
  
      def initUI(self):
          self.resize(900, 150)
          self.text = u"OSD Lyrics for Musicbox"
          self.setWindowTitle("Lyrics")
          self.show()
  
      @QtCore.pyqtSlot(str)
      def refresh_lyrics(self, text):
          self.text = text
          self.repaint()
  
      def paintEvent(self, event):
          qp = QtGui.QPainter()
          qp.begin(self)
          self.drawText(event, qp)
          qp.end()
  
      def drawText(self, event, qp):
          qp.setPen(QtGui.QColor(0, 0, 0))
          qp.setFont(QtGui.QFont('Decorative', 16))
          qp.drawText(event.rect(), QtCore.Qt.AlignCenter, self.text)
  
  def show_lyrics():
      app = QtGui.QApplication(sys.argv)
      # lyrics_receiver = LyricsReceiver()
      lyrics = Lyrics()
      QtDBus.QDBusConnection.sessionBus().registerService('org.musicbox.Bus')
      QtDBus.QDBusConnection.sessionBus().registerObject('/', lyrics, QtDBus.QDBusConnection.ExportAllSlots)
      sys.exit(app.exec_())
  
  def show_lyrics_new_process():
      p = Process(target=show_lyrics)
      p.start()
      os.system("notify-send 123")
      # p.join()
  
new_contents: from PyQt4 import QtGui, QtCore, QtDBus
  import sys
  import os
  from multiprocessing import Process
  
  class Lyrics(QtGui.QWidget):
      def __init__(self):
          super(Lyrics, self).__init__()
          self.initUI()
  
      def initUI(self):
          self.resize(900, 150)
          self.text = u"OSD Lyrics for Musicbox"
          self.setWindowTitle("Lyrics")
          self.show()
  
      @QtCore.pyqtSlot(str)
      def refresh_lyrics(self, text):
          self.text = text
          self.repaint()
  
      def paintEvent(self, event):
          qp = QtGui.QPainter()
          qp.begin(self)
          self.drawText(event, qp)
          qp.end()
  
      def drawText(self, event, qp):
          qp.setPen(QtGui.QColor(0, 0, 0))
          qp.setFont(QtGui.QFont('Decorative', 16))
          qp.drawText(event.rect(), QtCore.Qt.AlignCenter, self.text)
  
  def show_lyrics():
      app = QtGui.QApplication(sys.argv)
      # lyrics_receiver = LyricsReceiver()
      lyrics = Lyrics()
      QtDBus.QDBusConnection.sessionBus().registerService('org.musicbox.Bus')
      QtDBus.QDBusConnection.sessionBus().registerObject('/', lyrics, QtDBus.QDBusConnection.ExportAllSlots)
      sys.exit(app.exec_())
  
  def show_lyrics_new_process():
      p = Process(target=show_lyrics)
      p.start()
      # p.join()
  
subject: remove unnecessary code