[recipes] common: fixes blackout (higher order slice is iterable itself so we...

[recipes] common: fixes blackout (higher order slice is iterable itself so we can not make this optional)

recipes/common.py

@@ -137,8 +137,8 @@ class Base:
             "jet": ("analysis_jets", 6, common + ("btagDeepFlavB",), np.float32, {"groups": ["multiclass", "eval", "input", "part"]}),
             "fat": ("good_fat_bjets", 1, common + fat_jet_vars, np.float32, {"groups": ["multiclass", "eval", "input", "part"]}),
             "met": ("metp4", 0, common, np.float32, {"groups": ["multiclass", "eval", "input", "part"]}),
-            "nu": ("neutrino", 0, common, np.float32, {"groups": ["multiclass", "eval", "input", "part"], "blackout": np.s_[0:]}),
-            "hl": (None, 0, hl, np.float32, {"groups": ["multiclass", "eval", "input"], "blackout": np.s_[30:]}),
+            "nu": ("neutrino", 0, common, np.float32, {"groups": ["multiclass", "eval", "input", "part"], "blackout": [np.s_[0:]]}),
+            "hl": (None, 0, hl, np.float32, {"groups": ["multiclass", "eval", "input"], "blackout": [np.s_[30:]]}),
             "param": (None, 0, param, np.float32, {"groups": ["multiclass", "eval", "input"]}),
             "eventnr": (None, 0, ["eventnr"], np.int64, {"groups": ["multiclass", "eval", "split"]}),
             "procid": (None, 0, ["procid"], np.int32, {"groups": ["multiclass", "class"]}),