diff --git a/app/models/groups.py b/app/models/groups.py
index bc5943a96..4a07a8753 100644
--- a/app/models/groups.py
+++ b/app/models/groups.py
@@ -125,7 +125,7 @@ class Partition(ScoDocModel):
                 }
         return d
 
-    def get_etud_group(self, etudid: int) -> "GroupDescr":
+    def get_etud_group(self, etudid: int) -> "GroupDescr|None":
         "Le groupe de l'étudiant dans cette partition, ou None si pas présent"
         return (
             GroupDescr.query.filter_by(partition_id=self.id)
diff --git a/app/scodoc/sco_liste_notes.py b/app/scodoc/sco_liste_notes.py
index eb6647256..733536c87 100644
--- a/app/scodoc/sco_liste_notes.py
+++ b/app/scodoc/sco_liste_notes.py
@@ -39,10 +39,8 @@ from app.comp import moy_mod
 from app.comp.moy_mod import ModuleImplResults
 from app.comp.res_but import ResultatsSemestreBUT
 from app.comp.res_compat import NotesTableCompat
-from app.models import FormSemestre, Module
-from app.models.etudiants import Identite
-from app.models.evaluations import Evaluation
-from app.models.moduleimpls import ModuleImpl
+from app.models import Evaluation, FormSemestre, Identite, Module, ModuleImpl, Partition
+
 from app.scodoc import (
     sco_evaluations,
     sco_evaluation_db,
@@ -258,10 +256,8 @@ def _make_table_notes(
         if e.moduleimpl_id != modimpl.id:
             raise ValueError("invalid evaluations list")
 
-    if fmt == "xls" or fmt == "json":
-        keep_numeric = True  # pas de conversion des notes en strings
-    else:
-        keep_numeric = False
+    # pas de conversion des notes en strings pour certains formats:
+    keep_numeric = fmt in ("xls", "json")
     # Menu groupes
     group_selector = (
         sco_groups_view.form_groups_choice(
@@ -287,7 +283,8 @@ def _make_table_notes(
             columns_ids = ["etudid", "nom", "prenom"]
         else:
             columns_ids = ["nomprenom"]
-    partitions = []
+
+    partitions: list[Partition] = []
     if not args["hide_groups"]:
         if args["split_groups"]:
             partitions = formsemestre.get_partitions_list(
@@ -350,10 +347,13 @@ def _make_table_notes(
         if etat == scu.INSCRIT:  # si inscrit, indique groupe
             groups = sco_groups.get_etud_groups(etudid, formsemestre.id)
             grc = sco_groups.listgroups_abbrev(groups)
-            groups_cols = {
-                f"partition_{p.id}": p.get_etud_group(etudid).group_name or ""
-                for p in partitions
-            }
+            groups_cols = {}
+            for p in partitions:
+                etud_group = p.get_etud_group(etudid)
+                groups_cols[f"partition_{p.id}"] = (
+                    (etud_group.group_name or "") if etud_group else ""
+                )
+
         else:
             if etat == scu.DEMISSION:
                 grc = "DEM"  # attention: ce code est re-ecrit plus bas, ne pas le changer (?)