[pandas, pandas_panel] Update lectures for pandas 3.0 compatibility #470
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- Remove future_stack=True from .stack() calls (now default in pandas 3.0) - Update groupby axis text from 'deprecated' to 'removed' - Fix df.where() example to avoid str dtype conflict with non-string replacement - Add pandas>=3 to environment.yml (not included in anaconda=2025.12)
mmcky
changed the title
Conda doesn't have pandas 3.0 in default channel yet, so installing via pip.
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Summary
Updates
pandas.mdandpandas_panel.mdlectures for compatibility with pandas 3.0 (What's New).Changes
pandas_panel.mdfuture_stack=Truefrom all.stack()calls -- now the default in pandas 3.0# future_stack=True is required until pandas>3.0groupbyaxis support from "deprecated" to "removed" (fully removed in 3.0)pandas.mddf.where()example -- changeddf.where(df.POP >= 20000, False)todf.where(df.POP >= 20000). In pandas 3.0, string columns use the newstrdtype which cannot hold non-string values likeFalse.environment.ymlpandas>=3as an explicit dependency since it is not included inanaconda=2025.12Confirmed Compatible (no changes needed)
df.map()already used (removedapplymapnot present).loc[]assignments are Copy-on-Write safeM,H, etc.) used.groupby()already uses.T.groupby()patternpct_change()does not use removedlimitparam