&res created ARROW-12677:
----------------------------
Summary: Add a mask argument to pyarrow.StructArray.from_arrays
Key: ARROW-12677
URL: https://issues.apache.org/jira/browse/ARROW-12677
Project: Apache Arrow
Issue Type: Improvement
Components: Python
Reporter: &res
The python API for creating StructArray from a list of array doesn't allow to
pass a missing value mask.
At the moment the only way to create a StructArray with missing value is to use
`pyarrow.array` and passing a vector of tuple.
{code:python}
>>> pyarrow.array(
[
None,
(1, "foo"),
],
type=pyarrow.struct(
[pyarrow.field('col1', pyarrow.int64()), pyarrow.field("col2",
pyarrow.string())]
)
)
-- is_valid:
[
false,
true
]
-- child 0 type: int64
[
0,
1
]
-- child 1 type: string
[
"",
"foo"
]
>>> pyarrow.StructArray.from_arrays(
[
[None, 1],
[None, "foo"]
],
fields=[pyarrow.field('col1', pyarrow.int64()), pyarrow.field("col2",
pyarrow.string())]
)
-- is_valid: all not null
-- child 0 type: int64
[
null,
1
]
-- child 1 type: string
[
null,
"foo"
]
{code}
The C++ API allows it, so it should be easy to add.
see [this so question|https://stackoverflow.com/questions/67417110/]
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