diff options
Diffstat (limited to 'doc/source/reference/arrays.classes.rst')
| -rw-r--r-- | doc/source/reference/arrays.classes.rst | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/doc/source/reference/arrays.classes.rst b/doc/source/reference/arrays.classes.rst index 2f40423ee..34da83670 100644 --- a/doc/source/reference/arrays.classes.rst +++ b/doc/source/reference/arrays.classes.rst @@ -71,10 +71,11 @@ NumPy provides several hooks that classes can customize: The method should return either the result of the operation, or :obj:`NotImplemented` if the operation requested is not implemented. - If one of the input or output arguments has a :func:`__array_ufunc__` + If one of the input, output, or ``where`` arguments has a :func:`__array_ufunc__` method, it is executed *instead* of the ufunc. If more than one of the arguments implements :func:`__array_ufunc__`, they are tried in the - order: subclasses before superclasses, inputs before outputs, otherwise + order: subclasses before superclasses, inputs before outputs, + outputs before ``where``, otherwise left to right. The first routine returning something other than :obj:`NotImplemented` determines the result. If all of the :func:`__array_ufunc__` operations return :obj:`NotImplemented`, a @@ -162,15 +163,6 @@ NumPy provides several hooks that classes can customize: .. versionadded:: 1.16 - .. note:: - - - In NumPy 1.17, the protocol is enabled by default, but can be disabled - with ``NUMPY_EXPERIMENTAL_ARRAY_FUNCTION=0``. - - In NumPy 1.16, you need to set the environment variable - ``NUMPY_EXPERIMENTAL_ARRAY_FUNCTION=1`` before importing NumPy to use - NumPy function overrides. - - Eventually, expect to ``__array_function__`` to always be enabled. - - ``func`` is an arbitrary callable exposed by NumPy's public API, which was called in the form ``func(*args, **kwargs)``. - ``types`` is a collection :py:class:`collections.abc.Collection` |