From d331aafbc12b464baaf44745fd8e05ab756aa9e1 Mon Sep 17 00:00:00 2001
From: Andrew <andrewgsavage@gmail.com>
Date: Sun, 24 Dec 2023 05:34:44 +0000
Subject: [PATCH] check magnitude is array

---
 pint/facets/numpy/quantity.py | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/pint/facets/numpy/quantity.py b/pint/facets/numpy/quantity.py
index 5257766bc..561c1d31c 100644
--- a/pint/facets/numpy/quantity.py
+++ b/pint/facets/numpy/quantity.py
@@ -115,11 +115,12 @@ def _numpy_method_wrap(self, func, *args, **kwargs):
         return value
 
     def __array__(self, t=None) -> np.ndarray:
-        warnings.warn(
-            "The unit of the quantity is stripped when downcasting to ndarray.",
-            UnitStrippedWarning,
-            stacklevel=2,
-        )
+        if isinstance(self._magnitude, np.ndarray):
+            warnings.warn(
+                "The unit of the quantity is stripped when downcasting to ndarray.",
+                UnitStrippedWarning,
+                stacklevel=2,
+            )
         return _to_magnitude(self._magnitude, force_ndarray=True)
 
     def clip(self, min=None, max=None, out=None, **kwargs):