BUG: integers to a negative integer powers should error. #8127
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charris
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| * zero to negative integer powers returned least integral value. | ||
| * 1, -1 to negative integer powers returned correct values | ||
| * all remaining integers returne zero when raised ot negative integer powers. |
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Just some typos: "returne[d]" and "ot".
This is a change in behaviour. Previously * zero to negative integer powers returned least integral value. * 1, -1 to negative integer powers returned correct values * all remaining integers returned zero when raised to negative integer powers. All of these cases now raise a ``ValueError``. It was felt that a simple rule was the best way to go rather than have special exceptions for the units. If you need negative powers, use an inexact type.
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Numpy starts to error on those cases from 1.12 numpy/numpy#8127
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Numpy starts to error on those cases from 1.12 numpy/numpy#8127
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…wers xref numpy/numpy#8127 closes #14489 Author: Jeff Reback <jeff@reback.net> Closes #14498 from jreback/compat and squashes the following commits: 882872e [Jeff Reback] COMPAT/TST: fix test for range testing of negative integers to neg powers
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… negative integers to neg powers xref numpy/numpy#8127 closes pandas-dev#14489 Author: Jeff Reback <jeff@reback.net> Closes pandas-dev#14498 from jreback/compat and squashes the following commits: 882872e [Jeff Reback] COMPAT/TST: fix test for range testing of negative integers to neg powers (cherry picked from commit 050bf60)
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Rebase of #7599 with changes.
This is a change in behavior. Previously
All of these cases now raise a
ValueError. It was felt that a simplerule was the best way to go rather than have special exceptions for the
units. If you need negative powers, use an inexact type.
Fixes gh-7510.