pitrou commented on code in PR #44447:
URL: https://github.com/apache/arrow/pull/44447#discussion_r1807817010
##########
python/pyarrow/array.pxi:
##########
@@ -538,6 +538,51 @@ def repeat(value, size, MemoryPool memory_pool=None):
return pyarrow_wrap_array(c_array)
+def mask(indices, length, MemoryPool memory_pool=None):
+ """
+ Create a boolean Array instance where specific indices are marked as True.
+
+ Parameters
+ ----------
+ indices : list[int]
Review Comment:
At the C++ level you're right, at the Python level we allow implicit
conversion if it's non-ambiguous:
```python
>>> pc.list_flatten([[1, 2, 3], None, [4, None, 5]])
<pyarrow.lib.Int64Array object at 0x7f37d6454340>
[
1,
2,
3,
4,
null,
5
]
```
@felipecrv What do you think about this? Should it be a compute kernel or
rather a general facility?
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