GroupBy.head
See original GitHub issueImplement GroupBy.head
.
https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.core.groupby.GroupBy.head.html
Issue Analytics
- State:
- Created 4 years ago
- Comments:5 (3 by maintainers)
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GroupBy.head - Pandas
Return first n rows of each group. Similar to .apply(lambda x: x.head(n)) , but it returns a subset of rows from the original...
Read more >python - Pandas - sort and head inside groupby - Stack Overflow
@MaxU I'm trying groupby(...).apply(lambda x: x.nlargest(2, 'value')) but I'm getting weird results like duplicate rows and no filtered data ...
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The GroupBy.head preserves the index of the original dataframe. GroupBy.head can also be used to get the first record from each group ...
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pandas.core.groupby.GroupBy.head ... Returns first n rows of each group. Essentially equivalent to .apply(lambda x: x.head(n)) , except ignores as_index flag.
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pyspark.pandas.groupby.GroupBy.head¶. GroupBy. head (n: int = 5) → FrameLike[source]¶. Return first n rows of each group. Returns. DataFrame or Series.
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@arrayslayer Thanks for the comment! I’m afraid I don’t think the logic works at the first glance, but I might miss something. Please go ahead and feel free to submit the PR with your logic. Thanks!
@HyukjinKwon Thanks for the comment 😃 okay then i’m going to work on this from now on.