diff --git a/scripts/build_district_heat_share.py b/scripts/build_district_heat_share.py
index 6e934a2b..86c42631 100644
--- a/scripts/build_district_heat_share.py
+++ b/scripts/build_district_heat_share.py
@@ -29,9 +29,9 @@ if __name__ == "__main__":
 
     pop_layout = pd.read_csv(snakemake.input.clustered_pop_layout, index_col=0)
 
-    district_heat_share = pd.read_csv(
-        snakemake.input.district_heat_share, index_col=0
-    )["district heat share"]
+    district_heat_share = pd.read_csv(snakemake.input.district_heat_share, index_col=0)[
+        "district heat share"
+    ]
 
     # make ct-based share nodal
     district_heat_share = district_heat_share.loc[pop_layout.ct]