def load_topics(self):
for topic in self.get_topics()
line = Line(topic)
self.window.verticalLayout_2.addWindget(line.get_widget())
self._widgets.append(line)
executor = ThreadPoolExecutor(max_workers = 4)
for line in self._widgets:
info = line.get_info()
executor.submit(line.load_image,info['avatar'])