Rename "old_file_locking" into "existing_file_locking"

tomoscan/io.py

@@ -72,7 +72,7 @@ class HDF5File(h5py.File):
                 kwargs["libver"] = "latest"
             if enable_file_locking is None:
                 enable_file_locking = mode != "r"
-            old_file_locking = os.environ.get("HDF5_USE_FILE_LOCKING", None)
+            existing_file_locking = os.environ.get("HDF5_USE_FILE_LOCKING", None)
 
             def use_h5py_API_for_file_locking():
                 """use h5py API if (for HDF5 >= 1.12.1 or 1.10.x >= 1.10.7)"""
@@ -134,10 +134,10 @@ class HDF5File(h5py.File):
                     kwargs["libver"] = libver
                 super().__init__(filename, mode=mode, swmr=swmr, **kwargs)
             if not use_h5py_API_for_file_locking():
-                if old_file_locking is None:
+                if existing_file_locking is None:
                     del os.environ["HDF5_USE_FILE_LOCKING"]
                 else:
-                    os.environ["HDF5_USE_FILE_LOCKING"] = old_file_locking
+                    os.environ["HDF5_USE_FILE_LOCKING"] = existing_file_locking
 
     @contextmanager
     def _protect_init(self, filename):