AlenkaF commented on PR #40661:
URL: https://github.com/apache/arrow/pull/40661#issuecomment-2006507006
Opened a draft PR in case there are any ideas what is missing in the C++
code. The conversion currently results in a numpy array or pandas series with
correct length but only one value, which is not correct:
```python
In [1]: import pyarrow as pa
...: import pyarrow.compute as pc
...:
...: arr = pc.run_end_encode([1, 1, 2, 3, 3, 3, 6])
...: arr.to_numpy()
Out[1]:
array([6510615555426900570, 6510615555426900570, 6510615555426900570,
6510615555426900570, 6510615555426900570, 6510615555426900570,
6510615555426900570])
In [2]: import pyarrow as pa
...: import pyarrow.compute as pc
...:
...: arr = pc.run_end_encode([1, 1, 2, 3, 3, 3, 6])
...: arr.to_pandas()
Out[2]:
0 6510615555426900570
1 6510615555426900570
2 6510615555426900570
3 6510615555426900570
4 6510615555426900570
5 6510615555426900570
6 6510615555426900570
dtype: int64
```
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