better error message

fusion-energy · Nov 26, 2024 · 32f5e95 · 32f5e95
1 parent c97a696
commit 32f5e95
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/openmc_plasma_source/tokamak_source.py b/src/openmc_plasma_source/tokamak_source.py
@@ -445,5 +445,5 @@ def tokamak_neutron_source_density(
         return ion_density * reac_DT(ion_temperature)  # could use _DT_xs instead
     else:
         raise ValueError(
-            'Reaction {reaction} not in available options ["DD", "DT", "TT"]'
+            f'Reaction {reaction} not in available options ["DD", "DT", "TT"]'
         )