Move fasteners import inside ThreadSynchronizer

Author: agriyakhetarpal

src/zarr/v2/sync.py

@@ -2,8 +2,6 @@
 from collections import defaultdict
 from threading import Lock
 
-import fasteners
-
 
 class ThreadSynchronizer:
     """Provides synchronization using thread locks."""
@@ -42,6 +40,7 @@ def __init__(self, path):
 
     def __getitem__(self, item):
         path = os.path.join(self.path, item)
+        import fasteners
         lock = fasteners.InterProcessLock(path)
         return lock