NumPy 1.20 has been released [LWN.net]

NumPy 1.20 has been released

Posted Feb 24, 2021 14:05 UTC (Wed) by leephillips (guest, #100450)
In reply to: NumPy 1.20 has been released by quietbritishjim
Parent article: NumPy 1.20 has been released

As far as I can tell the results should be the same. This is an extension of the `where` keyword argument that was added to `numpy.reduce` in v. 1.17. Both when using the `where` keyword argument in when using `logical_and`, the Boolean mask array is broadcast to match the dimensions of the array in the first argument. There could be performance differences.

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NumPy 1.20 has been released

Posted Feb 24, 2021 14:49 UTC (Wed) by mhvk (subscriber, #86585) [Link]

Indeed, it just extends `where` to the wrappers around ufunc reductions (`np.logical_and.reduce` and `np.logical_or.reduce` in this case), really remedying an oversight from when I implemented `where` for reductions... I think the advantage is clearer for taking the mean, etc. For `any` and `all`, what would be nice is to have proper short-circuiting, but that is still on the wish list.

p.s. What makes `ndarray` so particularly nice is how it deals with strides to allow views of many forms into the array. This is nicely described in the "array programming with numpy" article; see https://ui.adsabs.harvard.edu/abs/2020Natur.585..357H/abs...