Как сгруппировать строки данных в список в полярах group_by ⇐ Python
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Как сгруппировать строки данных в список в полярах group_by
import polars as pl df = pl.DataFrame( { 'Letter': ['A', 'A', 'B', 'B', 'B', 'C', 'C', 'D','D','E'], 'Value': [1, 2, 3, 4, 5, 6, 7, 8, 9,10] } ) I want to group Letter and collect their corresponding Value in a List.
Related Pandas question: How to group dataframe rows into list in pandas groupby
I know pandas code will not work here:
df.group_by('a')['b'].apply(list) TypeError: 'GroupBy' object is not subscriptable Output will be:
| A ┆ [1, 2] │ │ B ┆ [3, 4, 5] │ │ C ┆ [6, 7] │ │ D ┆ [8, 9] │ │ E ┆ [10] |
Источник: https://stackoverflow.com/questions/781 ... s-group-by
import polars as pl df = pl.DataFrame( { 'Letter': ['A', 'A', 'B', 'B', 'B', 'C', 'C', 'D','D','E'], 'Value': [1, 2, 3, 4, 5, 6, 7, 8, 9,10] } ) I want to group Letter and collect their corresponding Value in a List.
Related Pandas question: How to group dataframe rows into list in pandas groupby
I know pandas code will not work here:
df.group_by('a')['b'].apply(list) TypeError: 'GroupBy' object is not subscriptable Output will be:
| A ┆ [1, 2] │ │ B ┆ [3, 4, 5] │ │ C ┆ [6, 7] │ │ D ┆ [8, 9] │ │ E ┆ [10] |
Источник: https://stackoverflow.com/questions/781 ... s-group-by
