add dump/load

Author: striest

physics_atv_visual_mapping/feature_key_list.py

@@ -88,4 +88,11 @@ def filter_metainfo(self, k):
         Return a FeatureKeyList containing fks from self that have metainfo=k
         """
         idxs = [i for i,m in enumerate(self.metainfo) if m==k]
-        return self[idxs]
+        return self[idxs]
+    
+    def dump(self):
+        return [f"{label}, {meta}" for label, meta in zip(self.label, self.metainfo)]
+    
+    def load(input):
+        labels, metas = zip(*[s.split(', ') for s in input])
+        return FeatureKeyList(label=list(labels), metainfo=list(metas))