Comments (8)
In the DeprecationWarning, and in future implementations when it's actually deprecated, it'd be awesome if the
.struct.unnest()
solution was suggested.
That is exactly how I've written it ;)
DeprecationWarning:
`from_records` does not support Series input; unpack Struct records using `srs.struct.unnest()` instead
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Awesome comments, thanks a lot!
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Change of plans; we're going to continue allowing this, but I've integrated the unnest
fast-path directly. I'd still recommend calling series.unnest()
as it seems clearer to me, but now you won't be penalised if you don't ;)
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.struct.unnest()
can be used as an alternative.
>>> series_of_structs.struct.unnest()
shape: (1, 3)
┌──────────────────┬───────────────────────────┬────────────┐
│ wellbore_uwi ┆ licensee_company_brand_id ┆ license_id │
│ --- ┆ --- ┆ --- │
│ str ┆ i64 ┆ i64 │
╞══════════════════╪═══════════════════════════╪════════════╡
│ 102071407712W500 ┆ 178 ┆ 16519701 │
└──────────────────┴───────────────────────────┴────────────┘
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I can fix, as it appears to be a regression, but this is a very odd way to achieve the desired result 😅 (While fixing I'll add a DeprecationWarning about use of Series
here, as it is definitely not intended to be used that way).
Note that @cmdlineluser's approach will also be dramatically faster.
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In the DeprecationWarning, and in future implementations when it's actually deprecated, it'd be awesome if the .struct.unnest()
solution was suggested.
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Good stuff, thanks! I think that's the best way!
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Change of plans (again): passing a Series to from_records
will raise a TypeError.
This function was never intended to handle Series inputs. The docs clearly state that a sequence-of-sequences is expected. So the fact that a Series was supported and parsed into a DataFrame was in fact a bug.
For a catch-all that parses all types of data, you can use the DataFrame constructor. For your specific use case, if you want to turn your Struct Series into a DataFrame, you should use struct.unnest
, as @cmdlineluser has pointed out.
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Related Issues (20)
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- Optimize for simple math? HOT 3
- read_csv on gzipped csv much slower if n_rows specified
- CSV
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- from_jax
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- Make `new_streaming` feature available on Rust Polars HOT 1
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- Add pl.Expr.min_by/max_by HOT 5
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- Support user defined aggregation functions/window functions as plugins HOT 1
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