uses duplicates.items() instead of duplicates

scripts/metadata/check_uuids.py

@@ -9,26 +9,31 @@
 import os
 import io
 
+
 def get_header(exfile: Path) -> str:
     text = exfile.read_text(encoding="utf-8")
     header = re.search(r"^---$(.+?)^---$", text, flags=re.M | re.S)
     if header is None:
         raise Exception(f"{exfile} does not contain a YAML header")
     if header.start() != 0:
-        raise Exception(f"{exfile} has a YAML block, which is not at the beginning of the file but at postion {header.start()}")
+        raise Exception(
+            f"{exfile} has a YAML block, which is not at the beginning of the file but at postion {header.start()}"
+        )
     return header.group(1)
 
+
 def find_duplicates(lst: List[Tuple[Path, str]]) -> List[Tuple[str, List[Path]]]:
     count = {}
     for path, id in lst:
         count.setdefault(id, [])
         count[id].append(path)
-    duplicates = { i: l for i, l in count.items() if len(l) > 1}
-    return list(duplicates)
+    duplicates = {i: l for i, l in count.items() if len(l) > 1}
+    return list(duplicates.items())
+
 
 if __name__ == "__main__":
     os.chdir(Path(__file__).parent)
-    exercises =  Path("../../exercises").glob("*/*/*/*.md")
+    exercises = Path("../../exercises").glob("*/*/*/*.md")
     headers = [(p, yaml.safe_load(io.StringIO(get_header(p)))) for p in exercises]
     noid = [(p, h) for p, h in headers if "id" not in h]
     ids = [(p, h["id"]) for p, h in headers if "id" in h]