GitHub / pandas-dev/pandas issues and pull requests
Labelled with: Copy / view semantics
#62074 - BUG(CoW): also raise for chained assignment for .at / .iat
Pull Request -
State: closed - Opened by jorisvandenbossche 4 months ago
Labels: Copy / view semantics
#61972 - BUG: Series.replace with CoW when made from an Index
Pull Request -
State: closed - Opened by rhshadrach 4 months ago
Labels: Bug, replace, Copy / view semantics
#61622 - BUG: CoW - eq not implemented for <class 'pandas.core.internals.blocks.ExtensionBlock'>
Issue -
State: open - Opened by mhabets 6 months ago
- 1 comment
Labels: Bug, Needs Triage, Copy / view semantics
#60742 - Backport PR #60713: TST(string dtype): Resolve xfail in test_base.py
Pull Request -
State: closed - Opened by rhshadrach 11 months ago
Labels: Testing, Strings, ExtensionArray, Copy / view semantics
#60713 - TST(string dtype): Resolve xfail in test_base.py
Pull Request -
State: closed - Opened by rhshadrach 11 months ago
- 3 comments
Labels: Testing, Strings, ExtensionArray, Copy / view semantics
#60713 - TST(string dtype): Resolve xfail in test_base.py
Pull Request -
State: open - Opened by rhshadrach 11 months ago
Labels: Testing, Strings, ExtensionArray, Copy / view semantics
#60469 - PERF: regression on mean(axis=1) compared to old pandas version
Issue -
State: open - Opened by Remy-ooo about 1 year ago
- 7 comments
Labels: Performance, Copy / view semantics
#59807 - BUG (CoW): fix reference tracking in replace_list with None
Pull Request -
State: closed - Opened by jorisvandenbossche about 1 year ago
Labels: Bug, replace, Copy / view semantics
#59788 - DOC: Series.update throws a `FutureWarning` about `def[col] = df[col].method` but `.update` returns `None` and works `inplace`
Issue -
State: open - Opened by spawn-guy about 1 year ago
- 10 comments
Labels: Needs Discussion, Warnings, Copy / view semantics, combine/combine_first/update
#59779 - BUG: Ambigious behaviour of multiplication assignment operator for series of type integer
Issue -
State: closed - Opened by juwoha about 1 year ago
- 1 comment
Labels: Bug, Copy / view semantics
#59770 - BUG: replace with 3 or more `None` values fails when copy_on_write is enabled
Issue -
State: closed - Opened by timvink about 1 year ago
- 2 comments
Labels: Bug, replace, Copy / view semantics
#59643 - PERF: Improve efficiency of `BlockValuesRefs._clear_dead_references(...)`
Pull Request -
State: closed - Opened by Tolker-KU over 1 year ago
Labels: Performance, Copy / view semantics
#59643 - PERF: Improve efficiency of `BlockValuesRefs._clear_dead_references(...)`
Pull Request -
State: closed - Opened by Tolker-KU over 1 year ago
- 1 comment
Labels: Performance, Copy / view semantics
#59598 - PERF: Improve efficiency of `BlockValuesRefs`
Pull Request -
State: closed - Opened by Tolker-KU over 1 year ago
- 3 comments
Labels: Enhancement, Performance, Copy / view semantics
#59598 - PERF: Improve efficiency of `BlockValuesRefs`
Pull Request -
State: closed - Opened by Tolker-KU over 1 year ago
- 2 comments
Labels: Enhancement, Performance, Copy / view semantics
#59272 - BUG: CoW does not seem to work on an index with duplicated labels
Issue -
State: closed - Opened by arnaudlegout over 1 year ago
- 11 comments
Labels: Performance, Copy / view semantics, Closing Candidate
#58966 - API/CoW: take view of underlying Block values for shallow (deep=False) copies
Pull Request -
State: open - Opened by jorisvandenbossche over 1 year ago
- 2 comments
Labels: Copy / view semantics, Stale
#58966 - API/CoW: take view of underlying Block values for shallow (deep=False) copies
Pull Request -
State: open - Opened by jorisvandenbossche over 1 year ago
Labels: Copy / view semantics
#58959 - PERF: Use shallow copies/remove unnecessary copies in reshaping
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: Reshaping, Copy / view semantics
#58959 - PERF: Use shallow copies/remove unnecessary copies in reshaping
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: Reshaping, Copy / view semantics
#58913 - BUG: DataFrame(data, ...) creates a copy when 'data' is a NumPy array (pandas 3.0+)
Issue -
State: closed - Opened by jameslamb over 1 year ago
- 9 comments
Labels: Bug, Needs Discussion, Constructors, Copy / view semantics
#58741 - CLN: Misc copy-on-write cleanups
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
Labels: Clean, Copy / view semantics
#58741 - CLN: Misc copy-on-write cleanups
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
Labels: Clean, Copy / view semantics
#58716 - BUG: ChainedAssignmentError link to documentation will break?
Issue -
State: closed - Opened by simonjayhawkins over 1 year ago
- 2 comments
Labels: Bug, Docs, Needs Triage, Copy / view semantics
#58292 - API: Make Series.array a read-only NumpyExtensionEA when applicable
Pull Request -
State: open - Opened by mroeschke over 1 year ago
Labels: Copy / view semantics
#58292 - API: Make Series.array a read-only NumpyExtensionEA when applicable
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
Labels: Copy / view semantics
#58007 - API: Make `Series.array` a read-only NumpyExtensionEA when applicable
Issue -
State: open - Opened by mroeschke over 1 year ago
- 2 comments
Labels: Copy / view semantics
#57872 - DEP: Deprecate CoW and no_silent_downcasting options
Pull Request -
State: closed - Opened by phofl over 1 year ago
- 3 comments
Labels: Deprecate, Copy / view semantics, Stale
#57872 - DEP: Deprecate CoW and no_silent_downcasting options
Pull Request -
State: open - Opened by phofl over 1 year ago
Labels: Deprecate, Copy / view semantics
#57870 - DEPR: Deprecate remaining copy usages
Pull Request -
State: closed - Opened by phofl over 1 year ago
Labels: Deprecate, Copy / view semantics
#57870 - DEPR: Deprecate remaining copy usages
Pull Request -
State: closed - Opened by phofl over 1 year ago
- 1 comment
Labels: Deprecate, Copy / view semantics
#57687 - Breaking change in nightly wheels when assigning to `df.values`, no FutureWarning
Issue -
State: closed - Opened by rossbar almost 2 years ago
- 4 comments
Labels: Bug, DataFrame, Copy / view semantics, Closing Candidate
#57513 - CoW: Clean up some copy usage
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57513 - CoW: Clean up some copy usage
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57487 - CoW: Track references in unstack if there is no copy
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 2 comments
Labels: Reshaping, Copy / view semantics
#57487 - CoW: Track references in unstack if there is no copy
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 3 comments
Labels: Reshaping, Copy / view semantics
#57478 - PERF: Improve performance for astype is view
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 2 comments
Labels: Performance, Copy / view semantics
#57477 - CoW: Remove remaining cow occurrences from tests
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 2 comments
Labels: Copy / view semantics
#57477 - Remove remaining cow occurrences from tests
Pull Request -
State: open - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57459 - PERF: DataFrame(ndarray) constructor ensure to copy to column-major layout
Pull Request -
State: closed - Opened by jorisvandenbossche almost 2 years ago
- 3 comments
Labels: Performance, Copy / view semantics
#57459 - PERF: DataFrame(ndarray) constructor ensure to copy to column-major layout
Pull Request -
State: closed - Opened by jorisvandenbossche almost 2 years ago
- 5 comments
Labels: Performance, Copy / view semantics
#57458 - PERF: use copy=False in constructor in unstack (CoW)
Pull Request -
State: closed - Opened by jorisvandenbossche almost 2 years ago
- 1 comment
Labels: Performance, Copy / view semantics
#57458 - PERF: use copy=False in constructor in unstack (CoW)
Pull Request -
State: closed - Opened by jorisvandenbossche almost 2 years ago
- 1 comment
Labels: Performance, Copy / view semantics
#57432 - DOC: CoW and column addition
Issue -
State: closed - Opened by JB-AM almost 2 years ago
- 4 comments
Labels: Docs, Needs Info, Copy / view semantics
#57431 - Potential perf regressions introduced by Copy-on-Write
Issue -
State: open - Opened by rhshadrach almost 2 years ago
- 9 comments
Labels: Performance, Regression, Copy / view semantics
#57406 - CLN: Misc pre-COW stuff
Pull Request -
State: open - Opened by mroeschke almost 2 years ago
Labels: Clean, Copy / view semantics
#57406 - CLN: Misc pre-COW stuff
Pull Request -
State: closed - Opened by mroeschke almost 2 years ago
Labels: Clean, Copy / view semantics
#57368 - CoW: Remove more using_copy_on_write fixtures
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57368 - CoW: Remove more using_copy_on_write fixtures
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57367 - CoW: Remove Copy-on-Write fixtures from more tests
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57367 - CoW: Remove Copy-on-Write fixtures from more tests
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57364 - CoW: Remove item_cache benchmarks
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Benchmark, Copy / view semantics
#57347 - CoW: Deprecate copy keyword from first set of methods
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Deprecate, Copy / view semantics
#57347 - CoW: Deprecate copy keyword from first set of methods
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Deprecate, Copy / view semantics
#57346 - CoW: Remove a few copy=False statements
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57339 - Backport PR #57323 on branch 2.2.x (REGR: Fix regression when grouping over a Series)
Pull Request -
State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, Copy / view semantics
#57339 - Backport PR #57323 on branch 2.2.x (REGR: Fix regression when grouping over a Series)
Pull Request -
State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Regression, Copy / view semantics
#57327 - CoW: Remove copy-keywords as far as possible
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57327 - CoW: Remove copy-keywords as far as possible
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57324 - CoW: Remove remaining occurrences from CoW
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57324 - CoW: Remove remaining occurrences from CoW
Pull Request -
State: open - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57323 - REGR: Fix regression when grouping over a Series
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Regression, Copy / view semantics
#57323 - REGR: Fix regression when grouping over a Series
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Regression, Copy / view semantics
#57276 - BUG: BlockManager.references_same_values not working with object-dtype block that has reference to an Index
Issue -
State: closed - Opened by jorisvandenbossche almost 2 years ago
- 1 comment
Labels: Bug, Copy / view semantics
#57270 - CoW: Remove cow branches from more tests
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57270 - CoW: Remove cow branches from more tests
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57269 - CoW: Finish deprecation enforcal on block level
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57269 - CoW: Finish deprecation enforcal on block level
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57255 - CoW: Remove copy-on-write conditions from frame tests
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57255 - CoW: Remove copy-on-write conditions from frame tests
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57254 - CoW: Enforce some deprecations on the datafame level
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57254 - CoW: Enforce some deprecations on the datafame level
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 2 comments
Labels: Copy / view semantics
#57253 - CoW: Enforce some deprecations on the block level
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57253 - CoW: Enforce some deprecations on the block level
Issue -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57238 - Remove Copy-on-Write builds
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: CI, Copy / view semantics
#57238 - Remove Copy-on-Write builds
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: CI, Copy / view semantics
#57237 - Remove Copy-on-Write warning mode from tests
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57237 - Remove Copy-on-Write warning mode from tests
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57234 - Remove Copy-on-Write warning mode
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57234 - Remove Copy-on-Write warning mode
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57143 - Backport PR #57139 on branch 2.2.x (BUG: Index(Series) makes array read only for object dtype)
Pull Request -
State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Copy / view semantics
#57143 - Backport PR #57139 on branch 2.2.x (BUG: Index(Series) makes array read only for object dtype)
Pull Request -
State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Copy / view semantics
#57139 - BUG: Index(Series) makes array read only for object dtype
Pull Request -
State: closed - Opened by phofl almost 2 years ago
Labels: Copy / view semantics
#57139 - BUG: Index(Series) makes array read only for object dtype
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Copy / view semantics
#57130 - BUG: empty dataframe indexing raises ValueError: buffer source array is read-only only when coming from db
Issue -
State: closed - Opened by jkittner almost 2 years ago
- 1 comment
Labels: Bug, Needs Triage, Copy / view semantics
#56790 - Backport PR #56402 on branch 2.2.x (TST/CoW: expand test for chained inplace methods)
Pull Request -
State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Copy / view semantics
#56790 - Backport PR #56402 on branch 2.2.x (TST/CoW: expand test for chained inplace methods)
Pull Request -
State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Copy / view semantics
#56660 - Backport PR #56635 on branch 2.2.x (CoW: Boolean indexer in MultiIndex raising read-only error)
Pull Request -
State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Indexing, Blocker, Copy / view semantics
#56639 - Backport PR #56636 on branch 2.2.x (DOC: Fixup CoW userguide)
Pull Request -
State: closed - Opened by meeseeksmachine almost 2 years ago
Labels: Docs, Copy / view semantics
#56636 - DOC: Fixup CoW userguide
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Docs, Copy / view semantics
#56635 - CoW: Boolean indexer in MultiIndex raising read-only error
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Indexing, Blocker, Copy / view semantics
#56633 - CoW: Enable CoW by default and remove warning build
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 3 comments
Labels: Copy / view semantics
#56622 - DOC: "Copy On Write: Patterns to avoid" confusion
Issue -
State: closed - Opened by avm19 almost 2 years ago
- 2 comments
Labels: Docs, Copy / view semantics
#56614 - DEPR: Remove SettingWithCopyWarning
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 5 comments
Labels: Copy / view semantics
#56614 - DEPR: Remove SettingWithCopyWarning
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 4 comments
Labels: Copy / view semantics
#56525 - CoW: Remove some no longer necessary todos
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 2 comments
Labels: Copy / view semantics
#56520 - CoW: Set a bunch of Series copy statements to False
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 4 comments
Labels: Copy / view semantics
#56456 - BUG: ChainedAssignmentError for CoW not working for chained inplace methods when passing `*args` or `**kwargs`
Issue -
State: open - Opened by jorisvandenbossche almost 2 years ago
- 1 comment
Labels: Bug, Copy / view semantics
#56418 - CoW: Update test with read-only array
Pull Request -
State: closed - Opened by phofl almost 2 years ago
- 1 comment
Labels: Testing, Copy / view semantics
#56403 - DOC: add deprecation of chained assignment to 2.2 whatsnew
Pull Request -
State: closed - Opened by jorisvandenbossche almost 2 years ago
- 1 comment
Labels: Docs, Copy / view semantics