Resolve "Missing status and mother_id in offline reader"

CHANGELOG.rst

 Unreleased changes
 ------------------
 * ``km3net-dataformat`` updated to 2.0.0
+* mother ID and status are now read out for MC tracks
 
 Version 0
 ---------
+
 0.20.0 / 2021-02-18
 ~~~~~~~~~~~~~~~~~~~
 * The fields ``.tdc``, ``.pos_{xyz}`` and ``.dir_{xyz}`` in ``.hits`` are

km3io/offline.py

@@ -79,8 +79,8 @@ class OfflineReader(EventReader):
             "E": "mc_trks.E",
             "t": "mc_trks.t",
             "len": "mc_trks.len",
-            # "status": "mc_trks.status",  # TODO: check this
-            # "mother_id": "mc_trks.mother_id",  # TODO: check this
+            "status": "mc_trks.status",
+            "mother_id": "mc_trks.mother_id",
             "pdgid": "mc_trks.type",
             "hit_ids": "mc_trks.hit_ids",
             "usr": "mc_trks.usr",  # TODO: trouble with uproot4

tests/test_offline.py

@@ -18,6 +18,9 @@ OFFLINE_MC_TRACK_USR = OfflineReader(
     )
 )
 OFFLINE_NUMUCC = OfflineReader(data_path("offline/numucc.root"))  # with mc data
+OFFLINE_MC_TRACK = OfflineReader(
+    data_path("gseagen/gseagen_v7.0.0_numuCC_diffuse.aa.root")
+)
 
 
 class TestOfflineReader(unittest.TestCase):
@@ -412,7 +415,11 @@ class TestOfflineTracks(unittest.TestCase):
         self.f = OFFLINE_FILE
         self.tracks = OFFLINE_FILE.events.tracks
         self.tracks_numucc = OFFLINE_NUMUCC
+        self.mc_tracks = OFFLINE_MC_TRACK.mc_tracks
+        self.mc_tracks_old = OFFLINE_MC_TRACK_USR.mc_tracks
         self.n_events = 10
+        self.status = [100, 5, 11, 15, 1, 12, 12, 12, 12, 12]
+        self.mother_id = [-1, -1, 1, 1, 0, 2, 5, 5, 6, 8]
 
     def test_fields(self):
         for field in [
@@ -433,6 +440,18 @@ class TestOfflineTracks(unittest.TestCase):
         ]:
             getattr(self.tracks, field)
 
+    def test_status(self):
+        assert np.allclose(self.status, self.mc_tracks[1].status[:10].tolist())
+
+    def test_mother_id(self):
+        assert np.allclose(self.mother_id, self.mc_tracks[1].mother_id[:10].tolist())
+
+    def test_attribute_error_raised_for_older_files(self):
+        with self.assertRaises(AttributeError):
+            self.mc_tracks_old[1].mother_id
+        with self.assertRaises(AttributeError):
+            self.mc_tracks_old[1].status
+
     def test_item_selection(self):
         self.assertListEqual(
             list(self.tracks[0].dir_z[:2]), [-0.872885221293917, -0.872885221293917]