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BUG?: using <code>None</code> as replacement value in <code>replace()</code> typically upcasts to object dtype

API - ConsistencyInternal Consistency of API/BehaviorInternal Consistency of API/Behavior

Bug

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

replacereplace methodreplace method

Status: Open.

#60284 In pandas-dev/pandas;

· jorisvandenbossche opened on Nov 12, 2024

BUG: df.replace() with list of regex sometimes fails with column of null objects

Bug

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

replacereplace methodreplace method

Status: Open.

#54399 In pandas-dev/pandas;

· zaneselvans opened on Aug 4, 2023

REF/PERF: replace with ArrowEA

Arrowpyarrow functionalitypyarrow functionality

PerformanceMemory or execution speed performanceMemory or execution speed performance

replacereplace methodreplace method

Status: Open.

#53711 In pandas-dev/pandas;

· jbrockmendel opened on Jun 17, 2023

BUG: pd.replace changes dtype when using a dict to replace values even when there are no matches

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

replacereplace methodreplace method

Status: Open.

#53539 In pandas-dev/pandas;

· sergiykhan opened on Jun 6, 2023

BUG: <code>pandas.DataFrame.replace</code> silently fails to replace category type columns.

Bug

CategoricalCategorical Data TypeCategorical Data Type

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

replacereplace methodreplace method

Status: Open.

#52571 In pandas-dev/pandas;

· corynezinstitchfix opened on Apr 10, 2023

BUG: <code>replace</code> inconsistency with <code>np.nan</code> &amp; <code>pd.NA</code>

Bug

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

NA - MaskedArraysRelated to pd.NA and nullable extension arraysRelated to pd.NA and nullable extension arrays

PDEP missing valuesIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprintIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprint

replacereplace methodreplace method

Status: Open.

#51237 In pandas-dev/pandas;

· galipremsagar opened on Feb 8, 2023

BUG: Can't I replace Ellipsis in DataFrame.replace like scalar

Bug

replacereplace methodreplace method

Status: Open.

#50373 In pandas-dev/pandas;

· jesrael opened on Dec 21, 2022

API: replace casting dtype instead of converting NA value when replacing missing value with another missing value

API - ConsistencyInternal Consistency of API/BehaviorInternal Consistency of API/Behavior

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

replacereplace methodreplace method

Status: Open.

#49421 In pandas-dev/pandas;

· phofl opened on Oct 31, 2022

BUG: <code>Series.replace</code> converts <code>np.nan</code> into <code>pd.NaT</code> implicitly

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

replacereplace methodreplace method

Status: Open.

#48034 In pandas-dev/pandas;

· ng-henry opened on Aug 11, 2022

BUG: AttributeError: 'bool' object has no attribute 'to_numpy' in "mask_missing" method of core/missing.py

Bug

ConstructorsSeries/DataFrame/Index/pd.array ConstructorsSeries/DataFrame/Index/pd.array Constructors

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

replacereplace methodreplace method

SubclassingSubclassing pandas objectsSubclassing pandas objects

Status: Open.

#47101 In pandas-dev/pandas;

· rainnnnny opened on May 24, 2022

DOC: replace() method documentation is not clear for confliciting/overlapping dict-based substitutions

Docs

replacereplace methodreplace method

Status: Open.

#46414 In pandas-dev/pandas;

· candalfigomoro opened on Mar 18, 2022

BUG: Series.replace with to_replace dict and value=None, nonsensical error message

Bug

Error ReportingIncorrect or improved errors from pandasIncorrect or improved errors from pandas

replacereplace methodreplace method

SeriesSeries data structureSeries data structure

Status: Open.

#46004 In pandas-dev/pandas;

· d-rams opened on Feb 15, 2022