Prevent NumPy from creating object arrays of Quantities on (ndarray *…

… Quantity) multiplication by setting __array_ufunc__=None.
mjziebarth · Sep 22, 2024 · 75bf451 · 75bf451
1 parent bc6768c
commit 75bf451
Show file tree

Hide file tree

Showing 2 changed files with 5 additions and 0 deletions.
diff --git a/README.md b/README.md
@@ -175,12 +175,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### [Unreleased]
 #### Added
 - Support for `dtype` and `copy` parameters in `Quantity._array`.
+- Added typing stubs for `Unit` and `Quantity`.
 
 #### Changed
 - Remove use of deprecated `numpy.array` with `copy=False`.
 - Removed internal inconsistency in how scalar and array-valued Quantities
   were handled in the `Quantity.wrapper()` routine. Now, scalar-valued
   quantities can similarly be filled from the C++ side.
+- Prevent NumPy from creating an object array on left-hand multiplication
+  by setting `__array_ufunc__ = None`.
 
 
 ### [0.4.0] - 2024-08-12

diff --git a/cyantities/quantity.pyx b/cyantities/quantity.pyx
@@ -321,6 +321,8 @@ cdef class Quantity:
     """
     __dict__: dict
 
+    __array_ufunc__ = None
+
     def __init__(self, value, unit, bool copy=True):
         #
         # First determine the values (scalar / ndarray)