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Issues list

BUG: csv.QUOTE_NOTNULL doesn't seem to be supported by DataFrame.to_csv(), but there's no error and it's not documented Enhancement IO CSV read_csv, to_csv
#60423 opened Nov 26, 2024 by wjandrea
3 tasks done
4
BUG: reading long csv with high numeric values displays a "mixed types" message Bug Closing Candidate May be closeable, needs more eyeballs IO CSV read_csv, to_csv
#60082 opened Oct 22, 2024 by MayeulC-ST
2 of 3 tasks
3
BUG: memory leak when using read_csv with python engine Bug IO CSV read_csv, to_csv Needs Info Clarification about behavior needed to assess issue
#59694 opened Sep 3, 2024 by r1ckdu
3 tasks done
1
BUG: inconsistency when read_csv reads MultiIndex with empty values Bug IO CSV read_csv, to_csv MultiIndex
#59560 opened Aug 20, 2024 by ldouteau
2 of 3 tasks
1
@brandonmonge
3
BUG: Error message in read_csv misleading when using decimal="," Bug Error Reporting Incorrect or improved errors from pandas IO CSV read_csv, to_csv
#59299 opened Jul 23, 2024 by behrenhoff
2 of 3 tasks
@Animesh-Shukla
1
ValueError: Usecols do not match columns, columns expected but not found: ['Col3', 'Col1'] Bug IO CSV read_csv, to_csv
#59139 opened Jun 28, 2024 by Hermann12
3 tasks done
6
BUG: None becomes empty string when writing multiple columns to CSV, but double quotes "" when writing single columns Bug Closing Candidate May be closeable, needs more eyeballs IO CSV read_csv, to_csv
#59116 opened Jun 26, 2024 by mvashishtha
2 of 3 tasks
3
BUG: Parameter converters when using the read function. Bug IO CSV read_csv, to_csv Needs Triage Issue that has not been reviewed by a pandas team member
#59026 opened Jun 17, 2024 by Thanaraklee
3 tasks done
@pongpatapee @Thanaraklee
4
BUG: Reading large CSV files with pyarrow when values contain newline character. Arrow pyarrow functionality Bug IO CSV read_csv, to_csv
#59009 opened Jun 13, 2024 by matteosantama
2 of 3 tasks
1
@wooseogchoi
10
ENH: The parameter date_format in read_csv Enhancement IO CSV read_csv, to_csv Needs Discussion Requires discussion from core team before further action
#58463 opened Apr 28, 2024 by BdR76
1 of 3 tasks
1
BUG: skiprows ignored in read_csv(engine="pyarrow") Arrow pyarrow functionality Bug IO CSV read_csv, to_csv
#58048 opened Mar 28, 2024 by rohanjain101
3 tasks done
@ashorkey-umich
5
BUG: pd.read_csv error when parse_dates used on index_col for dtype_backend="pyarrow" Arrow pyarrow functionality Bug Datetime Datetime data dtype ExtensionArray Extending pandas with custom dtypes or arrays. IO CSV read_csv, to_csv
#57930 opened Mar 20, 2024 by MCRE-BE
2 of 3 tasks
1
@lithomas1
12
BUG: pyarrow stripping leading zeros with dtype=str Arrow pyarrow functionality Bug IO CSV read_csv, to_csv
#57666 opened Feb 28, 2024 by dadrake3
3 tasks done
@kristinburg
5
BUG: Unexpected read_csv parse_dates behavior Bug datetime.date stdlib datetime.date support Dtype Conversions Unexpected or buggy dtype conversions IO CSV read_csv, to_csv
#57512 opened Feb 19, 2024 by kounoupis
2 of 3 tasks
1
@ruimamaral
6
BUG: Inconsistent handling of named column indices in to_csv() and read_csv(). Bug IO CSV read_csv, to_csv Needs Discussion Requires discussion from core team before further action
#57453 opened Feb 16, 2024 by normanius
3 tasks done
4
BUG: unexpected behavior in read_csv with pyarrow engine and dtype string Arrow pyarrow functionality Bug IO CSV read_csv, to_csv
#57100 opened Jan 27, 2024 by alejoforero
3 tasks done
@vinodseshadri
3
BUG: KeyError when loading csv with NaNs Bug IO CSV read_csv, to_csv Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate
#56929 opened Jan 17, 2024 by CYHSM
3 tasks done
1
3
BUG: read_csv with pyarrow engine treats newlines in quotes as newline when they should be ignored Arrow pyarrow functionality Bug IO CSV read_csv, to_csv Upstream issue Issue related to pandas dependency
#56396 opened Dec 8, 2023 by greerreNFL
2 of 3 tasks
3
BUG: read_csv loses precision when engine='pyarrow' and dtype Int64 Arrow pyarrow functionality Bug IO CSV read_csv, to_csv NA - MaskedArrays Related to pd.NA and nullable extension arrays
#56136 opened Nov 23, 2023 by MarcoGorelli
3 tasks done
2
BUG: read_csv losing precision when reading Int64[pyarrow] data with N/A values Arrow pyarrow functionality Bug IO CSV read_csv, to_csv
#56135 opened Nov 23, 2023 by MarcoGorelli
3 tasks done
2
API: categories.dtype with pd.read_csv(..., dtype='category') API Design Categorical Categorical Data Type IO CSV read_csv, to_csv
#56044 opened Nov 18, 2023 by jbrockmendel
BUG: Error writing DataFrame.to_csv() with categorical timestamptz column when na_rep is set to an escaped character Bug IO CSV read_csv, to_csv Needs Triage Issue that has not been reviewed by a pandas team member
#55945 opened Nov 13, 2023 by willsthompson
2 of 3 tasks
BUG: read_csv with lines starting whitespace #: engine="python" skips them, engine="c" doesn't Bug IO CSV read_csv, to_csv Needs Triage Issue that has not been reviewed by a pandas team member
#55916 opened Nov 10, 2023 by denis-bz
3 tasks done
2
DEPR: read_csv keywords: keep_date_col, delim_whitespace API Design Deprecate Functionality to remove in pandas IO CSV read_csv, to_csv
#55569 opened Oct 18, 2023 by jbrockmendel
1
14
BUG: to_csv with chunksize mismatched formatting of dt64 Bug Datetime Datetime data dtype IO CSV read_csv, to_csv
#55481 opened Oct 10, 2023 by jbrockmendel
@xiaohuanlin
5
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