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Issues list

TST: mutation testing results (possible tests to add) Needs Tests Unit test(s) needed to prevent regressions
#58517 opened May 1, 2024 by tdhock
8
BUG: concatenating time series with non ns unit leads to dataframe with missing data Bug Frequency DateOffsets Needs Tests Unit test(s) needed to prevent regressions Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#58471 opened Apr 29, 2024 by jorgehv
3 tasks done
7
BUG: options date_dayfirst and date_yearfirst conflict Datetime Datetime data dtype Docs Needs Tests Unit test(s) needed to prevent regressions
#43164 opened Aug 22, 2021 by attack68
5
BUG: Assigning extension array value to series of dtype object fails if element type is array-like Bug ExtensionArray Extending pandas with custom dtypes or arrays. Indexing Related to indexing on series/frames, not to indexes themselves Needs Tests Unit test(s) needed to prevent regressions Regression Functionality that used to work in a prior pandas version
#42437 opened Jul 7, 2021 by frreiss
3 tasks done
10
BUG: category index levels casted to non-category dtype in merge Bug Categorical Categorical Data Type Needs Tests Unit test(s) needed to prevent regressions Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#37480 opened Oct 29, 2020 by hliatrussellinvestments
3 tasks done
1
3
BUG: read_sql no longer works simply with SqlAlchemy selectables and a quick fix good first issue IO SQL to_sql, read_sql, read_sql_query Needs Tests Unit test(s) needed to prevent regressions
#35484 opened Jul 30, 2020 by machow
3 tasks done
1
12
BUG: groupby.sum() is inconsistent with df.sum() for large integers Bug Dtype Conversions Unexpected or buggy dtype conversions good first issue Groupby Needs Tests Unit test(s) needed to prevent regressions Reduction Operations sum, mean, min, max, etc.
#34681 opened Jun 9, 2020 by tom-weiss
1 task
@deejlucas
21
BUG: concat_{categorical, compat} leads to erroneous result on non-ns datetime-EA Bug ExtensionArray Extending pandas with custom dtypes or arrays. Needs Tests Unit test(s) needed to prevent regressions Non-Nano datetime64/timedelta64 with non-nanosecond resolution Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#33331 opened Apr 6, 2020 by xhochy
5
dtype does not get set to object when adding column with df.at[...] = ['some list'] Indexing Related to indexing on series/frames, not to indexes themselves Needs Tests Unit test(s) needed to prevent regressions
#30649 opened Jan 3, 2020 by McToel
2
@FactorizeD
5
startingMonth ignored on non-unitary Quarter periods Frequency DateOffsets good first issue Needs Tests Unit test(s) needed to prevent regressions Resample resample method
#29576 opened Nov 12, 2019 by aulemahal
2
@joshdelg @KatsiarynaDzibrova
6
Indexing on series where index is output from pd.cut good first issue Indexing Related to indexing on series/frames, not to indexes themselves Needs Tests Unit test(s) needed to prevent regressions
#27437 opened Jul 17, 2019 by kuchenrolle
1
@Thanushri16
16
IntervalIndex level in MultiIndex does not work as expected Indexing Related to indexing on series/frames, not to indexes themselves Interval Interval data type MultiIndex Needs Tests Unit test(s) needed to prevent regressions
#25298 opened Feb 13, 2019 by pushkarnimkar
1
6
Updating value of a single row of a column using loc or at fails good first issue Needs Tests Unit test(s) needed to prevent regressions
#22040 opened Jul 24, 2018 by abhinav-upadhyay
@ccccjone
14
API / BUG: How do we differentiate between -9223372036854775808 and iNaT? Bug Groupby Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Needs Tests Unit test(s) needed to prevent regressions Resample resample method
#16674 opened Jun 12, 2017 by gfyoung
5
BUG: need to block split when filling na good first issue Needs Tests Unit test(s) needed to prevent regressions
#14407 opened Oct 12, 2016 by jreback
@rishikesanr @nirmalmuppiri
9
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