fix

app.py

@@ -80,8 +80,8 @@ edge_labels = [
 ]
 
 def render_table(forms, lemmas, upos, xpos, feats, metadata, edges, edge_labels):
-    feats = [[f"*{f.split('=')[0]}:* {f.split('=')[1]}" for f in (feat.split("|"))] for feat in feats]
-    max_len = max([len(feat) for feat in feats])
+    feats = [[f"*{f.split('=')[0]}:* {f.split('=')[1]}" for f in (feat.split("|")) if '=' in f] for feat in feats]
+    max_len = max(1, max([len(feat) for feat in feats]))
     feats = [feat + [""] * (max_len - len(feat)) for feat in feats]
     feats = list(zip(*feats))