[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

graphs/edmonds_blossom_algorithm.py

@@ -4,8 +4,15 @@
 class BlossomAuxData:
     """Class to hold auxiliary data during the blossom algorithm's execution."""
 
-    def __init__(self, queue: deque, parent: list[int], base: list[int],
-                 in_blossom: list[bool], match: list[int], in_queue: list[bool]):
+    def __init__(
+        self,
+        queue: deque,
+        parent: list[int],
+        base: list[int],
+        in_blossom: list[bool],
+        match: list[int],
+        in_queue: list[bool],
+    ):
         self.queue = queue
         self.parent = parent
         self.base = base
@@ -87,9 +94,9 @@ def maximum_matching(edges: list[list[int]], vertex_count: int) -> list[list[int
                                 parent[y] = current  # Update the parent
                                 augmenting_path_found = True
                                 # Augment along this path
-                                EdmondsBlossomAlgorithm.update_matching(match,
-                                                                        parent,
-                                                                        y)
+                                EdmondsBlossomAlgorithm.update_matching(
+                                    match, parent, y
+                                )
                                 break
 
                             # Case 2: y is matched; add y's match to the queue
@@ -102,16 +109,25 @@ def maximum_matching(edges: list[list[int]], vertex_count: int) -> list[list[int
                         else:
                             # Case 3: Both current and y have a parent;
                             # check for a cycle/blossom
-                            base_u = EdmondsBlossomAlgorithm.find_base(base,
-                                                                       parent,
-                                                                       current,
-                                                                       y)
+                            base_u = EdmondsBlossomAlgorithm.find_base(
+                                base, parent, current, y
+                            )
                             if base_u != EdmondsBlossomAlgorithm.UNMATCHED:
-                                EdmondsBlossomAlgorithm.contract_blossom(BlossomData(
-                                    BlossomAuxData(queue, parent,
-                                                   base, in_blossom,
-                                                   match, in_queue),
-                                    current, y, base_u))
+                                EdmondsBlossomAlgorithm.contract_blossom(
+                                    BlossomData(
+                                        BlossomAuxData(
+                                            queue,
+                                            parent,
+                                            base,
+                                            in_blossom,
+                                            match,
+                                            in_queue,
+                                        ),
+                                        current,
+                                        y,
+                                        base_u,
+                                    )
+                                )
 
         # Create result list of matched pairs
         matching_result = []
@@ -181,16 +197,20 @@ def contract_blossom(blossom_data: BlossomData):
             blossom_data: The data related to the blossom to be contracted.
         """
         # Mark vertices in the blossom
-        for x in range(blossom_data.u,
-                       blossom_data.aux_data.base[blossom_data.u] != blossom_data.lca):
+        for x in range(
+            blossom_data.u,
+            blossom_data.aux_data.base[blossom_data.u] != blossom_data.lca,
+        ):
             base_x = blossom_data.aux_data.base[x]
             match_base_x = blossom_data.aux_data.base[blossom_data.aux_data.match[x]]
             # Mark the base as in a blossom
             blossom_data.aux_data.in_blossom[base_x] = True
             blossom_data.aux_data.in_blossom[match_base_x] = True
 
-        for x in range(blossom_data.v,
-                       blossom_data.aux_data.base[blossom_data.v] != blossom_data.lca):
+        for x in range(
+            blossom_data.v,
+            blossom_data.aux_data.base[blossom_data.v] != blossom_data.lca,
+        ):
             base_x = blossom_data.aux_data.base[x]
             match_base_x = blossom_data.aux_data.base[blossom_data.aux_data.match[x]]
             # Mark the base as in a blossom