from datetime import datetime as dt class PyItem(PyItemTemplate): def on_click(self, evt=None): self.data['done'] = not self.data['done'] self.strike(self.data['done']) self.select('input').element.checked = self.data['done'] class PyList(PyListTemplate): item_class = PyItem def add(self, item): if isinstance(item, str): item = { "content": item, "done": False, "created_at": dt.now() } super().add(item, labels=['content'], state_key="done")