Use old python 3.9 syntax for types

Author: rolandgeider

wger/nutrition/helpers.py

@@ -20,6 +20,7 @@
     dataclass,
 )
 from decimal import Decimal
+from typing import Union
 
 # wger
 from wger.nutrition.consts import (
@@ -102,14 +103,16 @@ def get_nutritional_values(self, use_metric=True):
 
 @dataclass
 class NutritionalValues:
-    energy: Decimal | int | float = 0
-    protein: Decimal | int | float = 0
-    carbohydrates: Decimal | int | float = 0
-    carbohydrates_sugar: Decimal | int | float | None = None
-    fat: Decimal | int | float = 0
-    fat_saturated: Decimal | int | float | None = None
-    fibres: Decimal | int | float | None = None
-    sodium: Decimal | int | float | None = None
+    # TODO: replace the Union with | when we drop support for python 3.9
+
+    energy: Union[Decimal, int, float] = 0
+    protein: Union[Decimal, int, float] = 0
+    carbohydrates: Union[Decimal, int, float] = 0
+    carbohydrates_sugar: Union[Decimal, int, float, None] = None
+    fat: Union[Decimal, int, float] = 0
+    fat_saturated: Union[Decimal, int, float, None] = None
+    fibres: Union[Decimal, int, float, None] = None
+    sodium: Union[Decimal, int, float, None] = None
 
     @property
     def energy_kilojoule(self):