TST: Add regression test for groupby().apply() external mutation #63126
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pandas-devGH-40673: Adds a test case to prevent regression of a bug where the internal object reused by apply() would corrupt externally stored DataFrames created with .copy(). This test verifies that store[0] and store[1] correctly contain independent copies of their respective groups.
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Are you sure this works though? Thanks in advance. |
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??????? |
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It works. What do you mean?? |
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All CI checks passed, the pull request is ready for review but i don't see a button to request a reviewer. |
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GH-40673: Adds a test case to prevent regression of a bug where the internal object reused by apply() would corrupt externally stored DataFrames created with .copy(). This test verifies that store[0] and store[1] correctly contain independent copies of their respective groups.
doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.AGENTS.md.