Avoid unnecessary re-opening of HDF5 files (Closes: #58248) #58275
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mroeschke
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Apr 16, 2024
doc/source/whatsnew/v3.0.0.rst
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| @@ -405,7 +405,7 @@ I/O | |||
| - Bug in :meth:`DataFrame.to_excel` when writing empty :class:`DataFrame` with :class:`MultiIndex` on both axes (:issue:`57696`) | |||
| - Bug in :meth:`DataFrame.to_string` that raised ``StopIteration`` with nested DataFrames. (:issue:`16098`) | |||
| - Bug in :meth:`read_csv` raising ``TypeError`` when ``index_col`` is specified and ``na_values`` is a dict containing the key ``None``. (:issue:`57547`) | |||
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| - Enhancement in :meth:`to_hdf` avoid unnecessary reopenings of the HDF5 file to speedup data addition to files with a very large number of groups . (:issue:`58248`) | |||
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Can you put this under the Performance improvements section?
mroeschke
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Performance
mroeschke
approved these changes
Apr 16, 2024
|
Thanks @avalentino |
pmhatre1
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May 7, 2024
…pandas-dev#58275) * Avoid unnecessary re-opening of HDF5 files * Update the whatsnew file * Move the changelog entry for pandas-dev#58248 to the correct section
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.