diff --git a/zooms_generator.py b/zooms_generator.py
index c9d7241..f31ff3d 100644
--- a/zooms_generator.py
+++ b/zooms_generator.py
@@ -18,60 +18,66 @@ def extract_zooms(src_folder):
     folder = Path(src_folder)
 
     zooms = {}
-    
+
     max_width = 0
     max_height = 0
-    
+
     idx = 0
 
     for svg_path in folder.glob("*.svg"):
-        
         idx += 1
-    
+
         print(f"page {idx} : {svg_path.name}")
-    
+
         zooms[idx] = {
             "name": svg_path.stem,
             "width": 0,
             "height": 0,
             "zooms": [],
         }
-    
+
         tree = ET.parse(svg_path)
         root = tree.getroot()
 
         if "." in root.get("width"):
-            print(f"WARNING: file {svg_path} has a floating width, it will be rounded", file=sys.stderr)
+            print(
+                f"WARNING: file {svg_path} has a floating width, it will be rounded",
+                file=sys.stderr,
+            )
         zooms[idx]["width"] = round(float(root.get("width")))
         if "." in root.get("height"):
-            print(f"WARNING: file {svg_path} has a floating height, it will be rounded", file=sys.stderr)
+            print(
+                f"WARNING: file {svg_path} has a floating height, it will be rounded",
+                file=sys.stderr,
+            )
         zooms[idx]["height"] = round(float(root.get("height")))
-        
-        for area in root.findall('.//{*}rect'):
-            zooms[idx]["zooms"].append([
-                float(area.get("width")),
-                float(area.get("height")),
-                float(area.get("x")),
-                float(area.get("y")),
-            ])
+
+        for area in root.findall(".//{*}rect"):
+            zooms[idx]["zooms"].append(
+                [
+                    float(area.get("width")),
+                    float(area.get("height")),
+                    float(area.get("x")),
+                    float(area.get("y")),
+                ]
+            )
 
     return zooms, max_width, max_height
 
 
 def write_json_or_js(zooms, dest_file, is_js):
-
     with open(dest_file, "w") as data_file:
-    
         if is_js:
             data_file.write("PAGES_ZOOMS = ")
         data_file.write("[\n")
         first_coma_skiped = False
         for page_idx in sorted(zooms.keys()):
             for zoom in zooms[page_idx]["zooms"]:
-            
-                if zoom[2] < 0 or zoom[3] < 0 :
-                    print(f"WARNING: negative pos x / pos y in page {page_idx} for zoom {zoom} (is the rectangle flipped?)")
-            
+                if zoom[2] < 0 or zoom[3] < 0:
+                    print(
+                        f"WARNING: negative pos x / pos y in page {page_idx} for zoom {zoom} (is the rectangle flipped?)"
+                    )
+
                 if first_coma_skiped:
                     data_file.write(",\n")
                 else:
@@ -81,68 +87,86 @@ def write_json_or_js(zooms, dest_file, is_js):
 
 
 def write_html(zooms, dest_file, pages_width, pages_height, prefix, extention):
-    
     img_tags = ""
     for page_idx in sorted(zooms.keys()):
         img_url = f"{prefix}{zooms[page_idx]['name']}.{extention}"
-        zoom_html_data = [','.join([str(zoom) for zoom in page_zooms]) for page_zooms in zooms[page_idx]["zooms"]]
-        zoom_html_str = ';'.join(zoom_html_data)
-        img_tags = img_tags + f'            <img loading="lazy" height="{zooms[page_idx]["height"]}" width="{zooms[page_idx]["width"]}" src="{img_url}" data-zooms="{zoom_html_str}"/>\n'
-    
+        zoom_html_data = [
+            ",".join([str(zoom) for zoom in page_zooms])
+            for page_zooms in zooms[page_idx]["zooms"]
+        ]
+        zoom_html_str = ";".join(zoom_html_data)
+        img_tags = (
+            img_tags
+            + f'            <img loading="lazy" height="{zooms[page_idx]["height"]}" width="{zooms[page_idx]["width"]}" src="{img_url}" data-zooms="{zoom_html_str}"/>\n'
+        )
+
     img_tags = img_tags.strip()
-    
+
     with open(HTML_TEMPLATE) as template_file, open(dest_file, "w") as data_file:
-        
         data = template_file.read().replace(HTML_TO_REPLACE, img_tags)
-    
+
         data_file.write(data)
 
 
 def generate_argparse():
-    """ Generate Melpomene's generator input parser"""
-    
+    """Generate Melpomene's generator input parser"""
+
     parser = argparse.ArgumentParser(
         description="Helper that can generate JSON / JS / HTML files for Melpomene webcomic reader"
     )
-    
-    parser.add_argument("output_format", choices=["html", "json", "js"], help="The type of output to generate")
+
+    parser.add_argument(
+        "output_format",
+        choices=["html", "json", "js"],
+        help="The type of output to generate",
+    )
     parser.add_argument("svg_folders", help="Path of the folder containing the SVGs")
-    parser.add_argument("-o", metavar="dest_file", help="Where to write the generator output to")
-    parser.add_argument("-p", default="", metavar="img_url_prefix", help="What to prefix the URL of the images when using HTML format.")
-    parser.add_argument("-e", default="png", metavar="img_ext", help="What extention to use in the URL of the images when using HTML format.")
-    
+    parser.add_argument(
+        "-o", metavar="dest_file", help="Where to write the generator output to"
+    )
+    parser.add_argument(
+        "-p",
+        default="",
+        metavar="img_url_prefix",
+        help="What to prefix the URL of the images when using HTML format.",
+    )
+    parser.add_argument(
+        "-e",
+        default="png",
+        metavar="img_ext",
+        help="What extention to use in the URL of the images when using HTML format.",
+    )
+
     return parser
 
 
 if __name__ == "__main__":
-
     args = generate_argparse().parse_args()
-    
-    
+
     # Get the final outout name
     output = None
-    
+
     if not args.o:
         output = "melpomene_data"
     else:
         output = args.o
-    
+
     if args.output_format == "html" and not output.endswith(".html"):
         output += ".html"
-    
+
     elif args.output_format == "json" and not output.endswith(".json"):
         output += ".json"
-    
+
     elif args.output_format == "js" and not output.endswith(".js"):
         output += ".js"
-    
+
     zooms, max_width, max_height = extract_zooms(args.svg_folders)
 
     if args.output_format == "html":
         write_html(zooms, output, max_width, max_height, args.p, args.e)
-    
+
     elif args.output_format == "json":
         write_json_or_js(zooms, output, False)
-    
+
     elif args.output_format == "js":
         write_json_or_js(zooms, output, True)