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BUG: Display Arithmetic Zero not Signed Zero aka 0 not -0
See original GitHub issuePandas version checks
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I have checked that this issue has not already been reported.
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I have confirmed this bug exists on the latest version of pandas.
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I have confirmed this bug exists on the main branch of pandas.
Reproducible Example
>>> import pandas as pd
>>> pd
<module 'pandas' from 'C:\\Users\\User\\AppData\\Local\\Programs\\Python\\Python310\\lib\\site-packages\\pandas\\__init__.py'>
>>> pd.__version__
'1.4.3'
>>> pd.Series([1,None,0])*-1
0 -1.0
1 NaN
2 -0.0
dtype: float64
>>>
Issue Description
0 is being returned with a negative sign ie -0.0
Expected Behavior
There should be no negative on zero ie 0 * -1 = 0
Installed Versions
pd.version ‘1.4.3’
Issue Analytics
- State:
- Created a year ago
- Comments:7 (3 by maintainers)
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This behavior mimics numpy
Generally, -0 is defined by IEEE and essentially acts like 0/+0. https://stackoverflow.com/a/4083431
Nonetheless, if this behavior was undesirable, it would need to be fixed in numpy/CPython so closing as a potential upstream issue.
https://github.com/python/cpython or https://github.com/numpy/numpy