Add cache support for single numpy dtype like np.int32 (#4667)

holoviz · Apr 19, 2023 · f737839 · f737839
1 parent 2ded375
commit f737839
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/panel/io/cache.py b/panel/io/cache.py
@@ -160,7 +160,8 @@ def _io_hash(obj):
     "numpy.ufunc"                : lambda obj: obj.__name__.encode(),
     # Functions
     inspect.isbuiltin          : lambda obj: obj.__name__.encode(),
-    inspect.ismodule           : lambda obj: obj.__name__
+    inspect.ismodule           : lambda obj: obj.__name__,
+    lambda x: hasattr(x, "tobytes") and x.shape == (): lambda x: x.tobytes(),  # Single numpy dtype like: np.int32
 }
 
 for name in _FFI_TYPE_NAMES: