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diff --git a/doc/release/2.0.0-notes.rst b/doc/release/2.0.0-notes.rst new file mode 100644 index 000000000..06e29de6b --- /dev/null +++ b/doc/release/2.0.0-notes.rst @@ -0,0 +1,37 @@ +========================= +NumPy 2.0.0 Release Notes +========================= + + +Plans +===== + +This release has the following aims: + +* Python 3 compatibility +* :pep:`3118` compatibility + + +Highlights +========== + + +New features +============ + +Warning on casting complex to real +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Numpy now emits a `numpy.ComplexWarning` when a complex number is cast +into a real number. For example: + + >>> x = np.array([1,2,3]) + >>> x[:2] = np.array([1+2j, 1-2j]) + ComplexWarning: Casting complex values to real discards the imaginary part + +The cast indeed discards the imaginary part, and this may not be the +intended behavior in all cases, hence the warning. This warning can be +turned off in the standard way: + + >>> import warnings + >>> warnings.simplefilter("ignore", np.ComplexWarning) |