Add a generic type representing all quantity implementations

shsms · shsms · commit de33b03226c9 · 2023-06-19T14:56:39.000+02:00
Signed-off-by: Sahas Subramanian &lt;sahas.subramanian@proton.me&gt;
diff --git a/src/frequenz/sdk/timeseries/_quantities.py b/src/frequenz/sdk/timeseries/_quantities.py
@@ -7,7 +7,9 @@
 
 import math
 from datetime import timedelta
-from typing import Self, overload
+from typing import Self, TypeVar, overload
+
+QuantityT = TypeVar("QuantityT", "Quantity", "Power", "Current", "Voltage", "Energy")
 
 
 class Quantity:
