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Diffstat (limited to 'doc/release')
| -rw-r--r-- | doc/release/1.9.0-notes.rst | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/doc/release/1.9.0-notes.rst b/doc/release/1.9.0-notes.rst index 4b1e094ad..35c8c6d8e 100644 --- a/doc/release/1.9.0-notes.rst +++ b/doc/release/1.9.0-notes.rst @@ -352,6 +352,26 @@ considered an input error instead of returning the default. The ``rank`` function has been deprecated to avoid confusion with ``numpy.linalg.matrix_rank``. +Object array equality comparisons +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +In the future object array comparisons both `==` and `np.equal` will not +make use of identity checks anymore. For example: + +>>> a = np.array([np.array([1, 2, 3]), 1]) +>>> b = np.array([np.array([1, 2, 3]), 1]) +>>> a == b + +will consistently return False (and in the future an error) even if the array +in `a` and `b` was the same object. + +The equality operator `==` will in the future raise errors like `np.equal` +if broadcasting or element comparisons, etc. fails. + +Comparison with `arr == None` will in the future do an elementwise comparison +instead of just returning False. Code should be using `arr is None`. + +All of these changes will give Deprecation- or FutureWarnings at this time. + C-API ~~~~~ |