MarcoGorelli opened a new issue, #44663:
URL: https://github.com/apache/arrow/issues/44663
### Describe the usage question you have. Please include as many useful
details as possible.
It looks like `Array.unique` maintains the order of elements' appearance:
```python
In [30]: pa.array([1, 1, 2, 2, 1, 4, 2]).unique()
Out[30]:
<pyarrow.lib.Int64Array object at 0x7f48661a9900>
[
1,
2,
4
]
```
Is this guaranteed to always be the case? If so, would you be open to
documenting the guarantee?
### Component(s)
Python
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