def spider_opened(self, spider):
export_dir = settings.get('EXPORT_DIR', '.')
t = time.strftime('%Y-%m-%d %H-%M-%S GMT+6', time.gmtime(time.time() + 6*3600))
path = os.path.join(export_dir, '%s.csv' % t)
self.file = open(path, 'w+b')
self.exporter = CSVRealstateItemExporter(self.file)
self.exporter.start_exporting()
