+try: from gnuradio import gr
+except ImportError, e:
+ d = gtk.MessageDialog(type=gtk.MESSAGE_ERROR, buttons=gtk.BUTTONS_CLOSE, message_format="""
+Cannot import gnuradio. Are your PYTHONPATH and LD_LIBRARY_PATH set correctly?""")
+ d.set_title(str(e))
+ d.run()
+ exit(-1)
+
+from gnuradio import gr