[~] Refactor

python/tasks/mlb_player.py

@@ -1821,9 +1821,13 @@ def kernel_29():
             )
         ]
 
+        assert len(t1) > 0
+
         with io.open(t4, 'w') as f:
             f.write(json.dumps(t1))
 
+        t7.append(t4)
+
     with io.open(t7[0], 'r') as f:
         t1 = json.load(f)