[
https://issues.apache.org/jira/browse/ARROW-12677?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Weston Pace updated ARROW-12677:
--------------------------------
Summary: [Python] Add a mask argument to pyarrow.StructArray.from_arrays
(was: [C++] Add a mask argument to pyarrow.StructArray.from_arrays)
> [Python] 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
> Priority: Trivial
>
> 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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