old_contents: import os
  
  qt_api = os.environ.get('QT_API', 'pyqt')
  
  if qt_api == 'pyqt':
      from PyQt4.QtCore import *
  
      from PyQt4.QtCore import pyqtSignal as Signal
      from PyQt4.Qt import QCoreApplication
      from PyQt4.Qt import Qt
  
  else:
      from PySide.QtCore import *
  
new_contents: import os
  
  qt_api = os.environ.get('QT_API', 'pyqt')
  
  if qt_api == 'pyqt':
      from PyQt4.QtCore import *
  
      from PyQt4.QtCore import pyqtSignal as Signal
      from PyQt4.Qt import QCoreApplication
      from PyQt4.Qt import Qt
  
      # Emulate PySide version metadata.
      __version__ = QT_VERSION_STR
      __version_info__ = tuple(map(int, QT_VERSION_STR.split('.')))
  
  else:
      from PySide.QtCore import *
  
subject: Add PySide-style version metadata when PyQt4 is present.