diff --git a/rules/retrieve.smk b/rules/retrieve.smk
index fec22eff..843ccd43 100644
--- a/rules/retrieve.smk
+++ b/rules/retrieve.smk
@@ -38,9 +38,9 @@ if config["enable"]["retrieve"] and config["enable"].get("retrieve_databundle",
         script:
             "../scripts/retrieve_databundle.py"
 
-if config["enable"].get("retrieve_irena", True):
 
-    datafiles=[
+if config["enable"].get("retrieve_irena", True):
+    datafiles = [
         "offwind_capacity_IRENA.csv",
         "onwind_capacity_IRENA.csv",
         "solar_capacity_IRENA.csv",
diff --git a/scripts/retrieve_irena.py b/scripts/retrieve_irena.py
index a448525d..d0f358c2 100644
--- a/scripts/retrieve_irena.py
+++ b/scripts/retrieve_irena.py
@@ -3,7 +3,6 @@
 # SPDX-FileCopyrightText: : 2017-2023 The PyPSA-Eur Authors
 #
 # SPDX-License-Identifier: MIT
-
 """
 This rule downloads the existing capacities from `IRENASTAT <https://www.irena.org/Data/Downloads/IRENASTAT>`_ and extracts it in the ``data/existing_capacities`` sub-directory.
 
@@ -27,7 +26,6 @@ This rule downloads the existing capacities from `IRENASTAT <https://www.irena.o
 import logging
 
 import pandas as pd
-
 from _helpers import configure_logging
 
 logger = logging.getLogger(__name__)
@@ -74,7 +72,6 @@ REGIONS_DICT = {
     "Bosnia and Herzegovina": "Bosnia Herzg",
     "Netherlands (Kingdom of the)": "Netherlands",
     "United Kingdom of Great Britain and Northern Ireland (the)": "UK",
-
 }
 
 if __name__ == "__main__":
@@ -84,23 +81,26 @@ if __name__ == "__main__":
         snakemake = mock_snakemake("retrieve_irena")
     configure_logging(snakemake)
 
-    irena_raw = pd.read_csv("https://pxweb.irena.org:443/sq/99e64b12-fe03-4a7b-92ea-a22cc3713b92",
-                            skiprows=2, index_col=[0, 1, 3], encoding="latin-1")
+    irena_raw = pd.read_csv(
+        "https://pxweb.irena.org:443/sq/99e64b12-fe03-4a7b-92ea-a22cc3713b92",
+        skiprows=2,
+        index_col=[0, 1, 3],
+        encoding="latin-1",
+    )
 
     var = "Installed electricity capacity (MW)"
-    irena = (
-        irena_raw[var]
-        .unstack(level=2)
-        .reset_index(level=1)
-        .replace(0, "")
-    )
+    irena = irena_raw[var].unstack(level=2).reset_index(level=1).replace(0, "")
 
     irena = irena[irena.index.isin(REGIONS)]
     irena.rename(index=REGIONS_DICT, inplace=True)
 
-    df_offwind = irena[irena.Technology.str.contains("Offshore")].drop(columns=['Technology'])
-    df_onwind = irena[irena.Technology.str.contains("Onshore")].drop(columns=['Technology'])
-    df_pv = irena[irena.Technology.str.contains("Solar")].drop(columns=['Technology'])
+    df_offwind = irena[irena.Technology.str.contains("Offshore")].drop(
+        columns=["Technology"]
+    )
+    df_onwind = irena[irena.Technology.str.contains("Onshore")].drop(
+        columns=["Technology"]
+    )
+    df_pv = irena[irena.Technology.str.contains("Solar")].drop(columns=["Technology"])
 
     df_offwind.to_csv(snakemake.output[0])
     df_onwind.to_csv(snakemake.output[1])