diff --git a/src/wireviz/DataClasses.py b/src/wireviz/DataClasses.py
index e3d80042..35bb13a2 100644
--- a/src/wireviz/DataClasses.py
+++ b/src/wireviz/DataClasses.py
@@ -309,9 +309,8 @@ def __post_init__(self) -> None:
         if self.wirecount:  # number of wires explicitly defined
             if self.colors:  # use custom color palette (partly or looped if needed)
                 pass
-            elif (
-                self.color_code
-            ):  # use standard color palette (partly or looped if needed)
+            elif self.color_code:
+                # use standard color palette (partly or looped if needed)
                 if self.color_code not in COLOR_CODES:
                     raise Exception("Unknown color code")
                 self.colors = COLOR_CODES[self.color_code]
diff --git a/src/wireviz/Harness.py b/src/wireviz/Harness.py
index 1f87d307..a6ed4da3 100644
--- a/src/wireviz/Harness.py
+++ b/src/wireviz/Harness.py
@@ -395,18 +395,16 @@ def create_graph(self) -> Graph:
                 wirehtml.append(
                     '     <table cellspacing="0" cellborder="0" border="0">'
                 )
-                for j, bgcolor in enumerate(
-                    bgcolors[::-1]
-                ):  # Reverse to match the curved wires when more than 2 colors
+                for j, bgcolor in enumerate(bgcolors[::-1]):
+                    # Reverse to match the curved wires when more than 2 colors
                     wirehtml.append(
                         f'      <tr><td colspan="3" cellpadding="0" height="2" bgcolor="{bgcolor if bgcolor != "" else wv_colors.default_color}" border="0"></td></tr>'
                     )
                 wirehtml.append("     </table>")
                 wirehtml.append("    </td>")
                 wirehtml.append("   </tr>")
-                if (
-                    cable.category == "bundle"
-                ):  # for bundles individual wires can have part information
+                if cable.category == "bundle":
+                    # for bundles individual wires can have part information
                     # create a list of wire parameters
                     wireidentification = []
                     if isinstance(cable.pn, list):
@@ -473,9 +471,8 @@ def create_graph(self) -> Graph:
 
             # connections
             for connection in cable.connections:
-                if isinstance(
-                    connection.via_port, int
-                ):  # check if it's an actual wire and not a shield
+                # check if it's an actual wire and not a shield
+                if isinstance(connection.via_port, int):
                     dot.attr(
                         "edge",
                         color=":".join(
diff --git a/src/wireviz/wireviz.py b/src/wireviz/wireviz.py
index f46a301e..ec8429c8 100755
--- a/src/wireviz/wireviz.py
+++ b/src/wireviz/wireviz.py
@@ -148,9 +148,8 @@ def check_designators(what, where):  # helper function
                     else:
                         sublist.append([item, 1])
                 connection_list.append(sublist)
-            elif isinstance(
-                item, list
-            ):  # a list of single-pin components were specified
+            elif isinstance(item, list):
+                # a list of single-pin components were specified
                 sublist = []
                 for subitem in item:
                     if yaml_data["connectors"][subitem].get("autogenerate"):
diff --git a/src/wireviz/wv_bom.py b/src/wireviz/wv_bom.py
index 29b49ef1..6689d79a 100644
--- a/src/wireviz/wv_bom.py
+++ b/src/wireviz/wv_bom.py
@@ -214,11 +214,8 @@ def get_bom_index(bom: List[BOMEntry], target: BOMKey) -> int:
 def bom_list(bom: List[BOMEntry]) -> List[List[str]]:
     """Return list of BOM rows as lists of column strings with headings in top row."""
     keys = list(BOM_COLUMNS_ALWAYS)  # Always include this fixed set of BOM columns.
-    for (
-        fieldname
-    ) in (
-        BOM_COLUMNS_OPTIONAL
-    ):  # Include only those optional BOM columns that are in use.
+    for fieldname in BOM_COLUMNS_OPTIONAL:
+        # Include only those optional BOM columns that are in use.
         if any(entry.get(fieldname) for entry in bom):
             keys.append(fieldname)
     # Custom mapping from internal name to BOM column headers.