Creating a dataframe from no data seems inconsistent
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Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 35/100
Research direction
Start with the Explorer.DataFrame.new calls shown in the issue, comparing the empty list with dtypes against the map containing an empty Explorer.Series. Trace how each constructor represents zero-row data, then make their results consistent and verify that the dataframe retains the product_family category column.
Written by the indexing model from the issue text.
Description
I would've expected both of those options to resolve to the latter result.
Explorer.DataFrame.new(
[],
dtypes: %{
product_family: :category
}
)
# #Explorer.DataFrame<
# Polars[0 x 0]
# >
Explorer.DataFrame.new(%{
product_family: Explorer.Series.from_list([], dtype: :category)
})
# #Explorer.DataFrame<
# Polars[0 x 1]
# product_family category []
# >- Dominant language
- Elixir
- Stars
- 1.3k
- Forks
- 155
- Avg merge
- 3d 12h
- Merged PRs (30d)
- 1
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