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ENH: Add __array_ufunc__#8247

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Apr 27, 2017

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• ENH: Revert "Temporarily disable __numpy_ufunc__"

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• ENH: Rename __numpy_ufunc__ to __array_ufunc__.

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• ENH: Remove position arg from __array_ufunc__.

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• MAINT: Put PyArray_GetAttrString_SuppressException in get_attr_string.h

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• MAINT: dike out a bunch of weird old code implementing scalar power

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• BUG/ENH: Switch to simplified __array_ufunc__/binop interaction

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• MAINT: allow __array_ufunc__ = None to force binops to defer.

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• MAINT: Split out C code in ufunc_override.h to .c file.

  

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• MAINT: Add NPY_NO_EXPORT modifier to PyUFunc_CheckOverride.

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• MAINT: for __array_ufunc__ pass inputs as *args, ensure out is tuple.

  

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• DOC: describe current implementation of __array_ufunc__.

  

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• DOC: Style and sphinx fixes for arrays.classes.rst.

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• TST: test that gufuncs are also overridden by __array_ufunc__.

  

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• DOC: Describe __array_func__ in subclassing

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• ENH: implement ndarray.__array_ufunc__

  

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• DOC Update NEP to reflect actual implementation.

  

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• MAINT: let ndarray.__array_ufunc__ bail if any overrides are in place.

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• MAINT: Update array_ufunc NEP.

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• DOC: Document behavior of ufuncs with default ndarray.__array_ufunc__

  

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• DOC: Update ndarray.__array_ufunc__ documentation vs. review comments

  

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• DOC: clarify use of super and getattr

  

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• DOC: update NEP again.

  

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• DOC: implement many smaller and bigger changes suggested in review.

  

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• BUG,MAINT: ensure out=None is never passed on to __array_ufunc__.

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• DOC: remove left-over piece discussing binops

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• REVERT: remove __array_ufunc__ override for np.dot and ndarray.dot.

  

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• REVERT: remove __array_ufunc__ override for np.matmul.

  

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• MAINT: simplify now that __array_ufunc__ overrides ufuncs only.

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• MAINT: split out umath-specific part of ufunc_override.

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• BUG: ensure subclass of override class doesn't segfault.

  

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• DOC: Mention `__array_ufunc__` in the 1.13.0 release notes.

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• DOC: ufunc-overrides: sync the discussion vs. current implementation

  

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• DOC: ufunc-overrides: revise hierarchy discussion

  

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• BUG: Add back removed elision code.

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• DOC,TST: clarify example of ndarray subclass using __array_ufunc__

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• BUG: Support nout == 0 and at method

  

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• DOC,MAINT: small corrections to NEP following Stephan's comments.

  

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• ENH: Add NDArrayOperatorsMixin mixin class.

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• DOC: clarify recommendations for subclasses, deprecations.

  

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• MAINT: remove unnecessary checks, wrong code for 'outer', cleanup.

  

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• BUG: Fix ArrayLike(NDArrayOperatorsMixin) operations with object()

  

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• ENH: Better error message for __array_ufunc__ not implemented

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• ENH: NDArrayOperatorsMixin calls ufuncs directly, like ndarray

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