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https://issues.apache.org/jira/browse/ARROW-11412?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joris Van den Bossche updated ARROW-11412:
------------------------------------------
    Summary: [Python] Expressions not working wiht logical boolean operators  
(and, or, not)  (was: [Python] Expression evaluation problem for logical 
boolean expressions (and, or, not))

> [Python] Expressions not working wiht logical boolean operators  (and, or, 
> not)
> -------------------------------------------------------------------------------
>
>                 Key: ARROW-11412
>                 URL: https://issues.apache.org/jira/browse/ARROW-11412
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>    Affects Versions: 2.0.0, 3.0.0
>            Reporter: Roman Karlstetter
>            Assignee: Joris Van den Bossche
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 1h 40m
>  Remaining Estimate: 0h
>
> There's a problem with boolean "and", "or" and "not" expressions when 
> creating them in python (or I'm doing something completely stupid).
>  
> {code:java}
> >>> import pyarrow
> >>> pyarrow.__version__
> '3.0.0'
> >>> import pyarrow.dataset as ds
> >>> ds. scalar(False) and ds.scalar(True) # <--- I expect false
> <pyarrow.dataset.Expression true>
> >>> ds.scalar(True) and ds.scalar(False) # this works
> <pyarrow.dataset.Expression false>
> >>> ds.scalar(True) or ds.scalar(False) # this works
> <pyarrow.dataset.Expression true>
> >>> ds.scalar(False) or ds.scalar(True) # <--- I expect true
> <pyarrow.dataset.Expression false>
> >>> not ds.scalar(True)   # this works                                        
> >>>                                                                           
> >>>                                                                           
> >>>       
> False                                                                         
>                                                                               
>                                                                 
> >>> not ds.scalar(False)      <--- I expect true                              
> >>>                                                                           
> >>>                                                                           
> >>>             
> False  
> {code}
> I tried to figure out what goes wrong here, but there are no obvious problems 
> in the python code, same for C++ (but I didn't quite understand everything of 
> it yet).
>  
> This happens with pyarrow3 and pyarrow2
>  
>  



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