def setUpClass(cls):
     # to see how to setup a qgis app in pyqgis
     # https://hub.qgis.org/issues/13494#note-19
     os.environ["QGIS_DEBUG"] = str(-1)
     QCoreApplication.setOrganizationName('QGIS')
     QCoreApplication.setApplicationName('QGIS2')
     QgsApplication.setPrefixPath(os.getenv("QGIS_PREFIX_PATH"), True)
     QgsApplication.setAuthDbDirPath('/home/richard/.qgis2/')