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Index constructor should always make a shallow copy, never returning the same object #10033

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shoyer opened this issue Apr 30, 2015 · 1 comment
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Index constructor should always make a shallow copy, never returning the same object #10033

shoyer opened this issue Apr 30, 2015 · 1 comment
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API Design Index Related to the Index class or subclasses

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@shoyer
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shoyer commented Apr 30, 2015

This is currently not the case (e.g., for TimedeltaIndex)

as discussed in #10026.
@sinhrks sinhrks mentioned this issue May 14, 2015
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@jreback jreback mentioned this issue Jul 24, 2015
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@jreback jreback added API Design Indexing Related to indexing on series/frames, not to indexes themselves labels Aug 5, 2015
@toobaz toobaz added Index Related to the Index class or subclasses and removed Indexing Related to indexing on series/frames, not to indexes themselves labels Jun 28, 2019
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toobaz commented Jun 28, 2019

I think this was fixed, at least for TimedeltaIndex.

In [2]: tdi = pd.TimedeltaIndex(['2d', '3d'])                                                                                                                 

In [3]: id(tdi)                                                                                                                                               
Out[3]: 140386936136200

In [4]: id(pd.TimedeltaIndex(tdi))                                                                                                                            
Out[4]: 140386936137712

In [5]: id(tdi.copy())                                                                                                                                        
Out[5]: 140386936309688

(Please reopen if I misunderstood...)

@toobaz toobaz closed this as completed Jun 28, 2019
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@jreback @shoyer @toobaz