diff --git a/rtree/core.py b/rtree/core.py
index e5648f7a..e9e7a355 100644
--- a/rtree/core.py
+++ b/rtree/core.py
@@ -135,7 +135,7 @@ def free_error_msg_ptr(result, func, cargs):
         ctypes.c_uint64,
         ctypes.c_void_p,
         ctypes.c_void_p,
-        ctypes.c_void_p
+        ctypes.c_void_p,
     ]
     rt.Index_CreateWithArray.restype = ctypes.c_void_p
     rt.Index_CreateWithArray.errcheck = check_void  # type: ignore
diff --git a/rtree/index.py b/rtree/index.py
index 1905cab9..51d5b2e2 100644
--- a/rtree/index.py
+++ b/rtree/index.py
@@ -286,7 +286,9 @@ def __init__(self, *args: Any, **kwargs: Any) -> None:
             try:
                 self.handle = self._create_idx_from_array(*arrays)
             except AttributeError:
-                raise NotImplementedError("libspatialindex >= 2.1 needed for bulk insert")
+                raise NotImplementedError(
+                    "libspatialindex >= 2.1 needed for bulk insert"
+                )
 
             if self._exception:
                 raise self._exception
@@ -1286,9 +1288,17 @@ def _create_idx_from_array(self, ibuf, minbuf, maxbuf):
         d_i_stri = minbuf.strides[0] // 8
         d_j_stri = minbuf.strides[1] // 8
 
-        return IndexArrayHandle(self.properties.handle, n, d, i_stri,
-                                d_i_stri, d_j_stri, ibuf.ctypes.data,
-                                minbuf.ctypes.data, maxbuf.ctypes.data)
+        return IndexArrayHandle(
+            self.properties.handle,
+            n,
+            d,
+            i_stri,
+            d_i_stri,
+            d_j_stri,
+            ibuf.ctypes.data,
+            minbuf.ctypes.data,
+            maxbuf.ctypes.data,
+        )
 
     def leaves(self):
         leaf_node_count = ctypes.c_uint32()