Fix lazy negative slice rewriting. #7586
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There was a bug in estimating the last index of the slice. Index a range object instead. Closes pydata#6560
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dcherian
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Mar 5, 2023
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headtr1ck
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Mar 13, 2023
| stop = start + int((stop - start - 1) / step) * step + 1 | ||
| start, stop = stop + 1, start + 1 | ||
| return slice(start, stop, -step), slice(None, None, -1) | ||
| exact_stop = range(start, stop, step)[-1] |
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That's a nice trick, have to remember that one :)
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Thanks @headtr1ck I made the test smaller. |
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Could this potentially affect performance? |
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Don't think so. I did add expliciit support for reversing a negative slice now. I think it's better? |
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* upstream/main: Save groupby codes after factorizing, pass to flox (pydata#7206) [skip-ci] Add compute to groupby benchmarks (pydata#7690) Delete built-in cfgrib backend (pydata#7670) Added a pronunciation guide to the word Xarray in the README.MD fil… (pydata#7677) boundarynorm fix (pydata#7553) Fix lazy negative slice rewriting. (pydata#7586) [pre-commit.ci] pre-commit autoupdate (pydata#7687) Adjust sidebar font colors (pydata#7674) Bump pypa/gh-action-pypi-publish from 1.8.1 to 1.8.3 (pydata#7682) Raise PermissionError when insufficient permissions (pydata#7629)
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There was a bug in estimating the last index of the slice.
Index a range object instead.