drin commented on issue #14116:
URL: https://github.com/apache/arrow/issues/14116#issuecomment-1248572896
I don't know very much about parquet, though I do understand Arrow.
If I understand the question correctly, you want to know how to go from a
`dict` to a `MapArray`?
What I tried to show was that the `mapping` param of `from_pylist` seems to
take a list of rows, where each row can be a dictionary mapping a column name
to a value for that column. In that sense, you could just have a function that
transforms a `dict` to a list of tuples. Logically this should be easy, though
I'm not sure how important performance is for you.
```python
# this dictionary represents a single row
tags_updated = {
"id": 1,
"tags": {
"tag1": "value1",
"tag2": "value2"
}
}
# extract and convert the value for the "tags" column
tags_as_map = [
(tag_key, tag_val)
for tag_key, tag_val in tags_updated.get('tags', {}).items()
]
# then we replace the value
tags_updated['tags'] = tags_as_map
# then we can use "from_pylist" as usual
table = Table.from_pylist(mapping=[tags_updated], schema=pyarrow_schema)
```
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