Clarify that constants are Python scalars #169
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rgommers
approved these changes
Apr 26, 2021
leofang
approved these changes
Apr 27, 2021
|
By merging this PR, I assume we can safely ignore #154? |
Don't know, could still be relevant. Would be nice to see a few more opinions on it. Let me comment on it. |
asmeurer
reviewed
Apr 27, 2021
This was referenced Jun 10, 2021
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This PR
Currently, the spec does not indicate how the constants should be exposed (e.g., Python scalars, zero-dimensional arrays, etc). This PR aims to remedy this.
The choice of Python scalar, rather than as a zero-dimensional array with a dtype described in the specification, stems from greater flexibility in how these constants participate in operations.
For example, according to the current specification,
piwould be truncated when participating in an operation with an array having an integer dtype, which may not be the case ifpiwas a zero-dimensionalfloat64array and participating in mixed-type promotion.Further, as a Python scalar,
piwould be converted to afloat32array when participating in an operation with an array having afloat32dtype, which would not be the case ifpiwas a zero-dimensionalfloat64array.