class MyWidget(DisplayWidget):
def __init__(self, parent=None):
super(MyWidget, self).__init__(parent)
self._executor = ProcessPoolExecutor(max_workers=4)
def _button_clicked(self):
future = self._executor.submit(download_data)
future.add_done_callback(self._populate_textarea)
def _populate_textarea(self, future):
self._textarea.setPlainText(future.result())
