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Issues list

BUG: isin check with numpy array works incorrectly when using UInt64 dtype Bug isin isin method Needs Discussion Requires discussion from core team before further action
#59609 opened Aug 26, 2024 by qltwis
2 of 3 tasks
1
1
BUG: isin propagates nulls for DataFrame but not Series Bug isin isin method NA - MaskedArrays Related to pd.NA and nullable extension arrays
#46326 opened Mar 11, 2022 by brandon-b-miller
3 tasks done
2
ENH: Behaviour Series.isin with dataframe comparison is confusing [for discussion] Error Reporting Incorrect or improved errors from pandas isin isin method Needs Discussion Requires discussion from core team before further action
#43460 opened Sep 8, 2021 by erfannariman
1
2
ENH: consider using sets and not maps for isin, unique and duplicated duplicated duplicated, drop_duplicates Enhancement isin isin method Performance Memory or execution speed performance
#39799 opened Feb 13, 2021 by realead
2
different behaviour of df.isin() in 1.0.5/1.1.0, when df contains None Bug isin isin method Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Regression Functionality that used to work in a prior pandas version
#35565 opened Aug 5, 2020 by johny-b
1
9
incosistencies in dataframe.dtype.isin() - I am getting inconsistent with different runs on same code. Bug hashing hash_pandas_object isin isin method Upstream issue Issue related to pandas dependency
#32443 opened Mar 4, 2020 by maleknia
20
How should isin behave with pd.NA? Bug isin isin method NA - MaskedArrays Related to pd.NA and nullable extension arrays
#31990 opened Feb 15, 2020 by dsaxton
4
pd.MultiIndex.isin doesn't validate input correctly Bug Error Reporting Incorrect or improved errors from pandas isin isin method MultiIndex
#26622 opened Jun 2, 2019 by telamonian
1
pandas.Series.isin() is slow on large sets due to conversion of set to list isin isin method Performance Memory or execution speed performance
#25507 opened Mar 1, 2019 by amerberg
1
2
MultiIndex.isin should handle input dims better Enhancement Error Reporting Incorrect or improved errors from pandas isin isin method MultiIndex
#20252 opened Mar 10, 2018 by TomAugspurger
isin() returns different results than eq() when mixing dtypes of comparators Bug Dtype Conversions Unexpected or buggy dtype conversions isin isin method
#16938 opened Jul 15, 2017 by mansenfranzen
1
ENH/API: check for full rows of DataFrame with isin? Enhancement isin isin method Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#7258 opened May 28, 2014 by jorisvandenbossche
9
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