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DOC: Add clarification to groupby docs regarding hashes and equality #57648

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Merged
merged 3 commits into from
Mar 6, 2024
Merged

DOC: Add clarification to groupby docs regarding hashes and equality #57648

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e1faa00
Add clarification to groupby docs regarding hashes and equality
gabuzi Feb 27, 2024
6d0ee41
Merge branch 'pandas-dev:main' into clarify-groupby-docs-hash
gabuzi Mar 6, 2024
8d1b299
shared_docs.py: Move hash-based note below user guide link
gabuzi Mar 6, 2024
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6 changes: 6 additions & 0 deletions pandas/core/shared_docs.py
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Expand Up @@ -178,6 +178,12 @@
<https://pandas.pydata.org/pandas-docs/stable/groupby.html>`__ for more
detailed usage and examples, including splitting an object into groups,
iterating through groups, selecting a group, aggregation, and more.

The implementation of groupby is hash-based, meaning in particular that
objects that compare as equal will be considered to be in the same group.
An exception to this is that pandas has special handling of NA values:
any NA values will be collapsed to a single group, regardless of how
they compare. See the user guide linked above for more details.
"""

_shared_docs["melt"] = """
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