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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Test failure in test_umath.py::TestUmath::test_fix with NumPy 2.4","articleBody":"```\nquantities/tests/test_umath.py F\n\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e traceback \u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\u003e\n\nself = array(3.14) * degF, obj = array(3.), context = (\u003cufunc 'trunc'\u003e, (array(3.14) * degF,), 0)\n\n    def __array_prepare__(self, obj, context=None):\n        if self.__array_priority__ \u003e= Quantity.__array_priority__:\n            res = obj if isinstance(obj, type(self)) else obj.view(type(self))\n        else:\n            # don't want a UnitQuantity\n            res = obj.view(Quantity)\n        if context is None:\n            return res\n\n        uf, objs, huh = context\n        if uf.__name__.startswith('is'):\n            return obj\n\n        try:\n\u003e           res._dimensionality = p_dict[uf](*objs)\n                                  ^^^^^^^^^^\nE           KeyError: \u003cufunc 'trunc'\u003e\n\nquantities/quantity.py:311: KeyError\n\nDuring handling of the above exception, another exception occurred:\n\nself = \u003cquantities.tests.test_umath.TestUmath testMethod=test_fix\u003e\n\n    def test_fix(self):\n\u003e       self.assertQuantityEqual(np.fix(3.14 * pq.degF), 3.0 * pq.degF)\n                                 ^^^^^^^^^^^^^^^^^^^^^^\n\nquantities/tests/test_umath.py:163:\n_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _\n../env-202601/lib/python3.14/site-packages/numpy/lib/_ufunclike_impl.py:59: in fix\n    return nx.trunc(x, out=out)\n           ^^^^^^^^^^^^^^^^^^^^\nquantities/quantity.py:331: in __array_wrap__\n    return self.__array_prepare__(obj, context)\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _\n\nself = array(3.14) * degF, obj = array(3.), context = (\u003cufunc 'trunc'\u003e, (array(3.14) * degF,), 0)\n\n    def __array_prepare__(self, obj, context=None):\n        if self.__array_priority__ \u003e= Quantity.__array_priority__:\n            res = obj if isinstance(obj, type(self)) else obj.view(type(self))\n        else:\n            # don't want a UnitQuantity\n            res = obj.view(Quantity)\n        if context is None:\n            return res\n\n        uf, objs, huh = context\n        if uf.__name__.startswith('is'):\n            return obj\n\n        try:\n            res._dimensionality = p_dict[uf](*objs)\n        except KeyError:\n\u003e           raise ValueError(\n                \"\"\"ufunc %r not supported by quantities\n                please file a bug report at https://github.com/python-quantities\n                \"\"\" % uf\n                )\nE           ValueError: ufunc \u003cufunc 'trunc'\u003e not supported by quantities\nE                           please file a bug report at https://github.com/python-quantities\n\nquantities/quantity.py:313: ValueError\n```\n\nThis seems to be because the implementation of np.fix was changed in NumPy 2.4 to use `trunc` ([v2.3.5](https://github.com/numpy/numpy/blob/c3d60fc8393f3ca3306b8ce8b6453d43737e3d90/numpy/lib/_ufunclike_impl.py#L17) [v2.4.0](https://github.com/numpy/numpy/blob/c5ab79c14c98bfda1e60770ffa23a6130f8267b7/numpy/lib/_ufunclike_impl.py#L17))","author":{"url":"https://github.com/apdavison","@type":"Person","name":"apdavison"},"datePublished":"2026-01-12T16:33:18.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/266/python-quantities/issues/266"}