diff --git a/notebooks/chokepoints/red-sea-chokepoints.ipynb b/notebooks/chokepoints/red-sea-chokepoints.ipynb
index 8d149b9..18ed315 100644
--- a/notebooks/chokepoints/red-sea-chokepoints.ipynb
+++ b/notebooks/chokepoints/red-sea-chokepoints.ipynb
@@ -1294,12 +1294,12 @@
    "outputs": [],
    "source": [
     "df.loc[:, \"period\"] = \"\"\n",
-    "df.loc[\n",
-    "    (df.date >= start_reference_date) & (df.date < crisis_date), \"period\"\n",
-    "] = \"Reference\"\n",
-    "df.loc[\n",
-    "    (df.date >= conflict_date) & (df.date < crisis_date), \"period\"\n",
-    "] = \"Middle East Conflict\"\n",
+    "df.loc[(df.date >= start_reference_date) & (df.date < crisis_date), \"period\"] = (\n",
+    "    \"Reference\"\n",
+    ")\n",
+    "df.loc[(df.date >= conflict_date) & (df.date < crisis_date), \"period\"] = (\n",
+    "    \"Middle East Conflict\"\n",
+    ")\n",
     "df.loc[(df.date >= crisis_date), \"period\"] = \"Red Sea Crisis\""
    ]
   },
diff --git a/notebooks/ports/red-sea-ports.ipynb b/notebooks/ports/red-sea-ports.ipynb
index d3ca837..861f888 100644
--- a/notebooks/ports/red-sea-ports.ipynb
+++ b/notebooks/ports/red-sea-ports.ipynb
@@ -1428,12 +1428,12 @@
    "outputs": [],
    "source": [
     "df.loc[:, \"period\"] = \"\"\n",
-    "df.loc[\n",
-    "    (df.date >= start_reference_date) & (df.date < crisis_date), \"period\"\n",
-    "] = \"Reference\"\n",
-    "df.loc[\n",
-    "    (df.date >= conflict_date) & (df.date < crisis_date), \"period\"\n",
-    "] = \"Middle East Conflict\"\n",
+    "df.loc[(df.date >= start_reference_date) & (df.date < crisis_date), \"period\"] = (\n",
+    "    \"Reference\"\n",
+    ")\n",
+    "df.loc[(df.date >= conflict_date) & (df.date < crisis_date), \"period\"] = (\n",
+    "    \"Middle East Conflict\"\n",
+    ")\n",
     "df.loc[(df.date >= crisis_date), \"period\"] = \"Red Sea Crisis\"\n",
     "df = df.merge(ports_red_sea[[\"portid\", \"country\"]], on=\"portid\")"
    ]
diff --git a/notebooks/routes/3-process-routes.ipynb b/notebooks/routes/3-process-routes.ipynb
index e073a52..751451f 100644
--- a/notebooks/routes/3-process-routes.ipynb
+++ b/notebooks/routes/3-process-routes.ipynb
@@ -1735,12 +1735,12 @@
    "outputs": [],
    "source": [
     "df_filt.loc[df_filt.Port == \"Suez Canal\", \"Country\"] = \"Chokepoint Suez Canal\"\n",
-    "df_filt.loc[\n",
-    "    df_filt.Port == \"Cape of Good Hope\", \"Country\"\n",
-    "] = \"Chokepoint Cape of Good Hope\"\n",
-    "df_filt.loc[\n",
-    "    df_filt.Port == \"Bab el-Mandeb Strait\", \"Country\"\n",
-    "] = \"Chokepoint Bab el-Mandeb Strait\""
+    "df_filt.loc[df_filt.Port == \"Cape of Good Hope\", \"Country\"] = (\n",
+    "    \"Chokepoint Cape of Good Hope\"\n",
+    ")\n",
+    "df_filt.loc[df_filt.Port == \"Bab el-Mandeb Strait\", \"Country\"] = (\n",
+    "    \"Chokepoint Bab el-Mandeb Strait\"\n",
+    ")"
    ]
   },
   {
@@ -1750,12 +1750,12 @@
    "outputs": [],
    "source": [
     "df_filt.loc[df_filt.prev_port == \"Suez Canal\", \"prev_country\"] = \"Chokepoint Suez Canal\"\n",
-    "df_filt.loc[\n",
-    "    df_filt.prev_port == \"Cape of Good Hope\", \"prev_country\"\n",
-    "] = \"Chokepoint Cape of Good Hope\"\n",
-    "df_filt.loc[\n",
-    "    df_filt.prev_port == \"Bab el-Mandeb Strait\", \"prev_country\"\n",
-    "] = \"Chokepoint Bab el-Mandeb Strait\""
+    "df_filt.loc[df_filt.prev_port == \"Cape of Good Hope\", \"prev_country\"] = (\n",
+    "    \"Chokepoint Cape of Good Hope\"\n",
+    ")\n",
+    "df_filt.loc[df_filt.prev_port == \"Bab el-Mandeb Strait\", \"prev_country\"] = (\n",
+    "    \"Chokepoint Bab el-Mandeb Strait\"\n",
+    ")"
    ]
   },
   {