pandas-dev / pandas

1 Release published by 1 person

• v1.2.0 Pandas 1.2.0

  published Dec 26, 2020

101 Pull requests merged by 30 people

• Backport PR #38704 on branch 1.2.x (DOC: Start v1.2.1 release notes)

  #38706 merged Dec 26, 2020

• DOC: Start v1.2.1 release notes

  #38704 merged Dec 26, 2020

• Backport PR #38678 on branch 1.2.x (DOC: 1.2.0 release date)

  #38702 merged Dec 26, 2020

• DOC: 1.2.0 release date

  #38678 merged Dec 26, 2020

• Backport PR #38679 on branch 1.2.x (Revert "Deprecated casting an object-dtype index of datetime objects to DatetimeIndex in the Series constructor (23598)")

  #38699 merged Dec 26, 2020

• CLN: remove unnecessary casting from Block methods

  #38700 merged Dec 26, 2020

• Revert "Deprecated casting an object-dtype index of datetime objects to DatetimeIndex in the Series constructor (23598)"

  #38679 merged Dec 25, 2020

• REF: share Index.union

  #38671 merged Dec 24, 2020

• PERF: fix assert_frame_equal can be very slow

  #38202 merged Dec 24, 2020

• REF: simplify coerce_to_target_dtype

  #38683 merged Dec 24, 2020

• CLN: algos.searchsorted

  #38686 merged Dec 24, 2020

• Add match=msg to pytest.raises or convert to external_error_raised for modules in tests/plotting

  #38684 merged Dec 24, 2020

• post-merge fixup

  #38685 merged Dec 24, 2020

• ENH: Map pandas integer to optimal SQLAlchemy integer type (GH35076)

  #38548 merged Dec 24, 2020

• CLN: simplify Block.putmask

  #38677 merged Dec 24, 2020

• REF: share Index.difference

  #38676 merged Dec 24, 2020

• REF: dispatch TDBlock._can_hold_element to TimedeltaArray._validate_setitem_value

  #38674 merged Dec 24, 2020

• TST: arithmetic test parametrization/cleanup

  #38673 merged Dec 24, 2020

• Backport PR #38654 on branch 1.2.x ([BUG] Concat duplicates errors (or lack there of))

  #38682 merged Dec 24, 2020

• [BUG] Concat duplicates errors (or lack there of)

  #38654 merged Dec 24, 2020

• Backport PR #38571 on branch 1.2.x (DEPR: Adjust read excel behavior for xlrd >= 2.0)

  #38670 merged Dec 24, 2020

• Backport PR #38657 on branch 1.2.x (DOC/CI: fix class alias docstrings for sphinx 3.4 + unpin sphinx)

  #38669 merged Dec 24, 2020

• REF: collect dt64<->dt64tz astype in dtypes.cast

  #38662 merged Dec 23, 2020

• BUG: `scatter_matrix` raising with 2d axis passed

  #38668 merged Dec 23, 2020

• ENH: Add dtype argument to read_sql_query (GH10285)

  #37546 merged Dec 23, 2020

• DEPR: Adjust read excel behavior for xlrd >= 2.0

  #38571 merged Dec 23, 2020

• DOC/CI: fix class alias docstrings for sphinx 3.4 + unpin sphinx

  #38657 merged Dec 23, 2020

• CLN: Rolling _prep_values

  #38666 merged Dec 23, 2020

• CLN: Rolling helper attributes

  #38664 merged Dec 23, 2020

• BUG: construction from dt64/td64 values with td64/dt64 dtype

  #38575 merged Dec 23, 2020

• CLN: numba.prange usage

  #38661 merged Dec 23, 2020

• BUG: MultiIndex, IntervalIndex intersection with Categorical

  #38653 merged Dec 23, 2020

• Backport PR #38456 on branch 1.2.x (DOC: update wording about when xlrd engine can be used)

  #38660 merged Dec 23, 2020

• DEPR: datetimelike.astype(int)

  #38544 merged Dec 23, 2020

• TST: fix rest of mpl warnings

  #38659 merged Dec 23, 2020

• BUG: disallow scalar in Categorical constructor

  #38472 merged Dec 23, 2020

• Backport PR #38293 on branch 1.2.x (BUG: read_json does not respect chunksize)

  #38658 merged Dec 23, 2020

• DOC: update wording about when xlrd engine can be used

  #38456 merged Dec 23, 2020

• BUG: read_json does not respect chunksize

  #38293 merged Dec 23, 2020

• REF: use DatetimeArray._validate_setitem_value for DatetimeBlock._can_hold_element

  #38651 merged Dec 23, 2020

• BUG: disallow scalar in CategoricalIndex construtor

  #38614 merged Dec 23, 2020

• TYP: Extend typing to allow passing Index to_datetime

  #38634 merged Dec 23, 2020

• REF: use _should_compare to short-circuit set operations

  #38643 merged Dec 23, 2020

• TST/BUG: _gen_two_subplots always adding subplot even with passed axis

  #38646 merged Dec 23, 2020

• REF: standardize get_indexer/get_indexer_non_unique code

  #38648 merged Dec 23, 2020

• ENH/ERR: More consistent error reporting with invalid win_type in rolling

  #38641 merged Dec 23, 2020

• BUG: Index([date]).astype("category").astype(object) roundtrip

  #38552 merged Dec 23, 2020

• patch wsl compatibility

  #38546 merged Dec 23, 2020

• DEPR: allowing subclass-specific keywords in pd.Index.__new__

  #38597 merged Dec 22, 2020

• Move docstring of NDFrame.replace in preparation of #32542

  #38561 merged Dec 22, 2020

• TST: GH30999 Add match=msg to all "with pytest.raises" in pandas/tests/io/pytables/test_store.py

  #38609 merged Dec 22, 2020

• TST: fix some mpl warnings

  #38574 merged Dec 22, 2020

• Backport PR #38533 on branch 1.2.x (BUG&TST: HTML formatting error in Styler.render() in rowspan attribute)

  #38640 merged Dec 22, 2020

• CLN refactor core indexes

  #37582 merged Dec 22, 2020

• REF: simplify logic in assert_produces_warning

  #38637 merged Dec 22, 2020

• Backport PR #38638 on branch 1.2.x (BUG: Fix regression in pandas merge)

  #38639 merged Dec 22, 2020

• REF: avoid special-casing Categorical astype

  #38530 merged Dec 22, 2020

• DOC: capitalize NumPy as proper noun

  #38631 merged Dec 22, 2020

• BUG&TST: HTML formatting error in Styler.render() in rowspan attribute

  #38533 merged Dec 22, 2020

• DOC: Clarify that DataFrame.sort_values is stable for sorting by multiple columns or labels

  #38426 merged Dec 22, 2020

• BUG: Fix regression in pandas merge

  #38638 merged Dec 22, 2020

• CI: add slash dispatch workflow to trigger pre-commit checks with comment

  #38444 merged Dec 22, 2020

• BUG: remove unused tz keyword from PeriodIndex constructor

  #38615 merged Dec 22, 2020

• API: CategoricalDtype.__eq__ with categories=None stricter

  #38516 merged Dec 22, 2020

• Backport PR #37905 on branch 1.2.x (BUG: groupby resample different results with .agg() vs .mean() )

  #38633 merged Dec 22, 2020

• Backport PR #37534 on branch 1.2.x (BUG: error raise when column contains percentage)

  #38632 merged Dec 22, 2020

• BUG: .sparse.to_coo() with numeric col index without a 0

  #38567 merged Dec 22, 2020

• REF: simplify CategoricalIndex.__new__

  #38605 merged Dec 22, 2020

• BUG: groupby resample different results with .agg() vs .mean()

  #37905 merged Dec 22, 2020

• REF: collected dtypes.cast and construction simplifications

  #38629 merged Dec 22, 2020

• ENH: add end and end_day origin for resample

  #38408 merged Dec 22, 2020

• BUG: error raise when column contains percentage

  #37534 merged Dec 22, 2020

• Bug: assert_produces_warning(None) not raising AssertionError with warning

  #38626 merged Dec 22, 2020

• TST/REF: Delete duplicate hist tests

  #38628 merged Dec 22, 2020

• BUG: require arraylike in infer_dtype_from_array

  #38473 merged Dec 22, 2020

• REF: require listlike in maybe_cast_to_datetime

  #38505 merged Dec 22, 2020

• CLN: DatetimeArray.astype

  #38572 merged Dec 22, 2020

• REF: share astype code in MaskedArray

  #38490 merged Dec 21, 2020

• REF: implement construct_2d_arraylike_from_scalar

  #38583 merged Dec 21, 2020

• TYP: pandas/io/sql.py (easy: bool/str)

  #38537 merged Dec 21, 2020

• TST/REF: consolidate hist tests

  #38618 merged Dec 21, 2020

• Backport PR #38613 on branch 1.2.x (CI: move py38 slow to azure #38429)

  #38624 merged Dec 21, 2020

• DOC: Enhance asfreq docs

  #36369 merged Dec 21, 2020

• CI: move py38 slow to azure #38429

  #38613 merged Dec 21, 2020

• TYP: Added cast to ABC EA types

  #38586 merged Dec 21, 2020

• Revert "REF: use astype_nansafe in Index.astype"

  #38610 merged Dec 21, 2020

• CLN: Window _constructors definitions

  #38595 merged Dec 21, 2020

• CLN: Remove _get_roll_func

  #38596 merged Dec 21, 2020

• REF: Block._astype defer to astype_nansafe in more cases

  #38562 merged Dec 21, 2020

• DOC: Add datatest package to list of third-party extension accessors.

  #38593 merged Dec 21, 2020

• TST/REF: collect datetimelike factorize tests

  #38573 merged Dec 21, 2020

• Backport PR #38532 on branch 1.2.x (BUG: Regression in logical ops raising ValueError with Categorical columns with unused categories)

  #38612 merged Dec 21, 2020

• Backport PR #38539 on branch 1.2.x (BUG: fix array conversion from Arrow for slided array)

  #38611 merged Dec 21, 2020

• BUG: MultiIndex.dtypes to handle when no level names

  #38582 merged Dec 21, 2020

• TST/REF: collect tests by method

  #38589 merged Dec 21, 2020

• TST: Added tests for ABC classes

  #38588 merged Dec 21, 2020

• BUG: Regression in logical ops raising ValueError with Categorical columns with unused categories

  #38532 merged Dec 21, 2020

• BUG: fix array conversion from Arrow for slided array

  #38539 merged Dec 21, 2020

• Backport PR #38598 on branch 1.2.x (BUG: Temporarily pin the version of Sphinx to 3.3.1 in requirements.)

  #38603 merged Dec 21, 2020

• BUG: Temporarily pin the version of Sphinx to 3.3.1 in requirements.

  #38598 merged Dec 21, 2020

• TST: Bare pytest raises

  #38576 merged Dec 20, 2020

22 Pull requests opened by 15 people

• ENH: add ignore index to DataFrame / Series.sample

  #38594 opened Dec 20, 2020

• BUG: join not working correctly with MultiIndex and one dimension categorical

  #38621 opened Dec 21, 2020

• TYP: pd.eval, DataFrame.(eval, query)

  #38625 opened Dec 21, 2020

• CI: clean azure pipeline

  #38636 opened Dec 22, 2020

• BUG: Fix regression for groupby.indices in case of unused categories

  #38649 opened Dec 22, 2020

• Develop pre check

  #38663 opened Dec 23, 2020

• REF: Index.__new__

  #38665 opened Dec 23, 2020

• CLN: Add typing for dtype argument in io/sql.py

  #38680 opened Dec 24, 2020

• BUG: DataFrame.rank with np.inf and np.nan

  #38681 opened Dec 24, 2020

• TST: implement tm.check_setitem_equivalents

  #38688 opened Dec 24, 2020

• REF: make pd._testing a directory

  #38689 opened Dec 24, 2020

• BUG: Inconsistent behavior of `.replace()` in Int64 series with `<NA>`.

  #38693 opened Dec 25, 2020

• TST: GH30999 Add match=msg to all pytest.raises in tests/generic/methods/test_sample.py

  #38695 opened Dec 25, 2020

• Updated PULL_REQUEST_TEMPLATE.md

  #38696 opened Dec 25, 2020

• TST: GH30999 Add match=msg to all pytest.raises in tests/indexes

  #38697 opened Dec 25, 2020

• BUG: Fix pd.json_normalize to not skip the first element of a generator input

  #38698 opened Dec 25, 2020

• DEPR MultiIndex.is_lexsorted and MultiIndex.lexsort_depth

  #38701 opened Dec 26, 2020

• TST: GH30999 Add match=msg to all pytest.raises in pandas/tests/io/json

  #38705 opened Dec 26, 2020

• TST: Remove broken test for deprecated functionality

  #38707 opened Dec 26, 2020

• API: Series[bool][key] = np.nan -> cast to object

  #38709 opened Dec 27, 2020

• ENH: Add xlsb auto detection to read_excel and respect default options

  #38710 opened Dec 27, 2020

• BUG: Added test cases for GH#36936

  #38711 opened Dec 27, 2020

42 Issues closed by 8 people

• BUG/DEPR: Fix unwanted warnings from the Series(Index[datetime objects]) deprecation

  #38182 closed Dec 25, 2020

• Split up pandas/tests/io/pytables/test_store.py into smaller modules

  #38687 closed Dec 25, 2020

• BUG: assert_frame_equal can be very slow

  #38183 closed Dec 24, 2020

• Partial date indexing only works with single key

  #27180 closed Dec 24, 2020

• pd.testing.assert_frame_equal doesn't do precision according to the doc

  #25068 closed Dec 24, 2020

• BUG: Integer Capacity Higher Than Necessary in Mappings from Pandas to SQLAlchemy Types

  #35076 closed Dec 24, 2020

• BUG: concat on axis with both different and duplicate labels raising error

  #6963 closed Dec 24, 2020

• BUG: dataframe.pivot()

  #38675 closed Dec 24, 2020

• [pandas.tools.plotting._subplots] squeeze option is not respected if `ax` is provided

  #16253 closed Dec 23, 2020

• Add dtype keyword to read_sql_query to control per column dtypes.

  #10285 closed Dec 23, 2020

• shift default excel read engine from xlrd to openpyxl

  #38424 closed Dec 23, 2020

• DEPS: unpin sphinx from doc build

  #38600 closed Dec 23, 2020

• Datetimelike index / arrays ignore integer sign and size in astype

  #24381 closed Dec 23, 2020

• Fix matplotlib warnings

  #18306 closed Dec 23, 2020

• BUG/API: allowing scalars in Categorical constructor

  #38433 closed Dec 23, 2020

• Chunksize from json memory consumption as high as without chunksize

  #34548 closed Dec 23, 2020

• How to use nrows along with chunksize in read_json()

  #36791 closed Dec 23, 2020

• BUG: Minor HTML formatting error in Styler.render(): rowspan attribute should use quotes

  #38234 closed Dec 23, 2020

• ERR: Most consistent error handling when passing win_type='freq' in rolling

  #15969 closed Dec 23, 2020

• BUG: can't use to_clipboard/read_clipboard on WSL 2.0

  #38527 closed Dec 23, 2020

• BUG: multiple index dataframe with index names groupy rolling computing reture wrong index

  #38655 closed Dec 23, 2020

• BUG: `DataFrame.corrwith` seems to be broken

  #38647 closed Dec 23, 2020

• DOC: documentation rendering issue for functions using typing overloads

  #37239 closed Dec 23, 2020

• Add histtype argument to pandas.Series.plot.hist()

  #16423 closed Dec 23, 2020

• ERR: stricter checks on Index construction when tz is passed

  #14093 closed Dec 22, 2020

• BUG/API: Index constructor does not enforce specified dtype

  #21311 closed Dec 22, 2020

• Index() constructor is inconsistent in detecting subclass-specific keyword arguments

  #22315 closed Dec 22, 2020

• Index constructor doesn't validate kwargs

  #26974 closed Dec 22, 2020

• DOC: Clarify stability of sorting in documentation of DataFrame.sort_values for multiple columns / labels

  #38357 closed Dec 22, 2020

• REGR: pandas 1.2rc fails merge with AttributeError: 'bool' object has no attribute 'all'

  #38616 closed Dec 22, 2020

• BUG: Selection with Multiindex columns may not honor requested column order

  #38602 closed Dec 22, 2020

• KeyError when calling to_coo() on SparseDataFrame

  #18414 closed Dec 22, 2020

• BUG: groupby resample different results with .agg() vs .mean()

  #33548 closed Dec 22, 2020

• ENH: Add 'end' option in resample's origin

  #37804 closed Dec 22, 2020

• BUG: pd.read_sql_table() raises unknown column error when column name of a table contains `%`

  #37157 closed Dec 22, 2020

• BUG: tm.assert_produces_warning() doesn't work with expected_warning=None or False

  #38620 closed Dec 22, 2020

• REGR: astype(str) of object array with byte objects

  #38607 closed Dec 21, 2020

• ERROR : "('HY000', 'The driver did not supply an error!')" or "The incoming request has too many parameters" when trying to push a df to a MS SQL database using the to_sql() method with argument method='multi'

  #38541 closed Dec 21, 2020

• BUG: In Multilevel.dtypes when level name is not specified it gives wrong output

  #38580 closed Dec 21, 2020

• BUG: Pandas 1.1.5 location-based indexing error with quantized pivot table

  #38367 closed Dec 21, 2020

• BUG: pyarrow_array_to_numpy_and_mask is not taking offset into account when creating mask

  #38525 closed Dec 21, 2020

• BUG: DataFrame.apply returns inconsistent index depending on applied function's return type

  #35683 closed Dec 20, 2020

25 Issues opened by 20 people

• BUG: repr of stringified integers (e.g. "3.50") drops ending "0"

  #38708 opened Dec 26, 2020

• CI: jedi v0.18.0 breaks a number of ipython test_tab_complete_warning tests

  #38703 opened Dec 26, 2020

• DOC add command to run pre-commit checks to pull request template

  #38694 opened Dec 25, 2020

• API: setting np.nan into Series[bool]

  #38692 opened Dec 25, 2020

• BUG: Pandas pivot_table fails with columns and margin

  #38691 opened Dec 25, 2020

• ASV: Add benchmark for indexing with .loc for sorted/unsorted DatetimeIndex

  #38690 opened Dec 25, 2020

• BUG: SeriesGroupBy.value_counts is inconsistent with Series.value_counts when the Series is categorical

  #38672 opened Dec 24, 2020

• BUG: read_excel does not use pyxlsb for xlsb files when engine is None

  #38667 opened Dec 23, 2020

• why not check the column order and type consistent before use ‘appand’ mode in to_csv or equivalent ops such as to_sql?

  #38656 opened Dec 23, 2020

• ENH: improve partial key indexing performance

  #38650 opened Dec 23, 2020

• BUG: passing dask arrays to Series or DataFrame

  #38645 opened Dec 22, 2020

• BUG: Roundtrip with openpyxl and datetime precision

  #38644 opened Dec 22, 2020

• REGR: GroupBy.indices no longer includes unobserved categories

  #38642 opened Dec 22, 2020

• ValueError: Only callable can be used as callback

  #38635 opened Dec 22, 2020

• TST/BUG: Unexpected warnings causing failures on master with fixed `assert_produces_warnings(None)` behavior

  #38630 opened Dec 22, 2020

• DOC: example for doing a reversed rolling window

  #38627 opened Dec 21, 2020

• BUG: Index and MultiIndex ops treating nan differently

  #38623 opened Dec 21, 2020

• BUG: dt64 <-> dt64tz roundup

  #38622 opened Dec 21, 2020

• CI: move arm64 build off travis

  #38617 opened Dec 21, 2020

• BUG: Pandas plot ignores timezone information

  #38608 opened Dec 21, 2020

• BUG: surprising non-error when assigning a multi-column DataFrame to a single column

  #38604 opened Dec 21, 2020

• BUG: loc assignment with a numpy array fails when MultiIndex columns are not sorted

  #38601 opened Dec 21, 2020

• BUG:Issue Concerning Ambiguous Numpy Array Shape in Column

  #38599 opened Dec 21, 2020

• Performance regression in DataFrame reduction ops

  #38592 opened Dec 20, 2020

• PERF: performance regressions in 1.2.0rc

  #38591 opened Dec 20, 2020

108 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• RLS: 1.2

  #37784 commented on Dec 26, 2020 • 25 new comments

• Solved desing problem with to_datetime when "ignore" error was being used.

  #38393 commented on Dec 24, 2020 • 18 new comments

• DOC: add Comparison with Excel

  #38554 commented on Dec 27, 2020 • 18 new comments

• POC: ArrayManager -- array-based data manager for columnar store

  #36010 commented on Dec 21, 2020 • 14 new comments

• CI: Move sql builds from Travis to Github actions

  #38344 commented on Dec 26, 2020 • 14 new comments

• BUG: Index.get_indexer_non_unique misbehaves with multiple nan

  #35498 commented on Dec 24, 2020 • 13 new comments

• ENH: add masked algorithm for mean() function

  #34814 commented on Dec 26, 2020 • 11 new comments

• TYP: pandas/core/frame.py

  #38416 commented on Dec 21, 2020 • 10 new comments

• ENH: Allow column grouping in DataFrame.plot

  #29944 commented on Dec 22, 2020 • 9 new comments

• ENH: Add method argument to rolling constructor to allow table-wise rolling

  #38417 commented on Dec 23, 2020 • 9 new comments

• ENH: Styler tooltips feature

  #35643 commented on Dec 22, 2020 • 8 new comments

• BUG: loc raising KeyError for string slices in list-like indexer and DatetimeIndex

  #38153 commented on Dec 24, 2020 • 8 new comments

• ENH: add ignore_index to DataFrame / Series.sample

  #38581 commented on Dec 26, 2020 • 7 new comments

• [Good first issue] TST: Disallow bare pytest.raises

  #30999 commented on Dec 26, 2020 • 6 new comments

• BUG: Index.union() inconsistent with non-unique Indexes

  #36299 commented on Dec 22, 2020 • 6 new comments

• BUG: Series.where casting dt64 to int64

  #38073 commented on Dec 27, 2020 • 6 new comments

• BUG: loc dropping levels when df has only one row

  #38150 commented on Dec 24, 2020 • 6 new comments

• [#38390] Bug fix for Datetime64Formatter with values of ndim > 1

  #38391 commented on Dec 22, 2020 • 6 new comments

• BUG: Direct renaming of 1 column seems to be accepted, but only old name is working

  #38547 commented on Dec 24, 2020 • 5 new comments

• Tests .loc on sparse DataFrame #34687

  #38540 commented on Dec 21, 2020 • 5 new comments

• BUG: Series mode crashes when there is more than one mode

  #38534 commented on Dec 20, 2020 • 4 new comments

• BUG: Timestamp == date match stdlib

  #36131 commented on Dec 27, 2020 • 4 new comments

• BUG: Categorical.unique should keep dtype unchanged

  #38140 commented on Dec 23, 2020 • 4 new comments

• test groupby.indices for multiple groupby and mix of types

  #38273 commented on Dec 20, 2020 • 4 new comments

• BUG: add sorting_reamaining=True to avoid IndexError GH25831

  #38438 commented on Dec 22, 2020 • 4 new comments

• BUG: Support timespec argument in Timestamp.isoformat() (#26131)

  #38550 commented on Dec 21, 2020 • 4 new comments

• BUG: Pandas 1.0.5 → 1.1.0 behavior change on DataFrame.apply() where func returns tuple

  #35518 commented on Dec 21, 2020 • 3 new comments

• DatetimeIndex selection with .loc is orders of magnitude slower than [] on ordered frame

  #17754 commented on Dec 24, 2020 • 3 new comments

• ENH: support Ellipsis in loc/iloc

  #37750 commented on Dec 24, 2020 • 3 new comments

• BUG: Fix Index.__repr__ when `display.max_seq_items` = 1

  #38443 commented on Dec 26, 2020 • 3 new comments

• TST/REF: io/parser/(test_dtypes.py, test_usecols.py)

  #38578 commented on Dec 22, 2020 • 3 new comments

• ENH: Raise ParserWarning when length of names does not match length of data

  #38587 commented on Dec 24, 2020 • 3 new comments

• BUG: Inconsistent results using pd.json_normalize() on a generator object versus list (off by one)

  #35923 commented on Dec 20, 2020 • 2 new comments

• BUG: `to_json()/read_json()` can't correctly dump/load numbers requiring >15 digits of precision

  #38437 commented on Dec 24, 2020 • 2 new comments

• BUG: Date objects cannot be compared against a DatetimeIndex

  #35466 commented on Dec 24, 2020 • 2 new comments

• plot.pie() autopct shows 0.00 for 0/None data

  #33707 commented on Dec 24, 2020 • 2 new comments

• CLN refactor rest of core

  #37586 commented on Dec 26, 2020 • 2 new comments

• BUG: Bug in loc did not change dtype when complete column was assigned

  #37749 commented on Dec 23, 2020 • 2 new comments

• ENH: Arrow backed string array - implement factorize() method without casting to objects

  #38007 commented on Dec 24, 2020 • 2 new comments

• DOC: Corrected Out-of-date list of sort algorithms

  #38503 commented on Dec 23, 2020 • 2 new comments

• MultiIndex: support isna, fixes #34019

  #38558 commented on Dec 22, 2020 • 2 new comments

• Thousands separator for to_csv

  #30045 commented on Dec 20, 2020 • 1 new comment

• QST: CSV read issue

  #35820 commented on Dec 21, 2020 • 1 new comment

• ENH: Add an `assert` method to Series and DataFrame to assert on the fly in chaining

  #38356 commented on Dec 21, 2020 • 1 new comment

• BUG: read_excel(engine='openpyxl') with "unsized" XLSX issue

  #34821 commented on Dec 21, 2020 • 1 new comment

• BUG: Index.astype does not localize to UTC first like Series.astype with datetime64[ns, tz] dtypes

  #33401 commented on Dec 21, 2020 • 1 new comment

• BUG: Groupby-Apply with modifying dataframe and sorting overwrites group values

  #36602 commented on Dec 22, 2020 • 1 new comment

• cross section coercion with output iterating

  #12859 commented on Dec 22, 2020 • 1 new comment

• BUG: read_csv with custom date parser and na_filter=True results in ValueError

  #36111 commented on Dec 22, 2020 • 1 new comment

• ENH: Pluggable SQL performance

  #36893 commented on Dec 22, 2020 • 1 new comment

• TST: any_* fixtures are confusingly named

  #38017 commented on Dec 22, 2020 • 1 new comment

• STYLE: fail on pd.testing direct usage

  #37957 commented on Dec 23, 2020 • 1 new comment

• BUG: DataFrame.mad(axis=1) not working for nullable integer dtype

  #33036 commented on Dec 23, 2020 • 1 new comment

• ENH: pd.link([*dataframes], how='left')

  #38075 commented on Dec 23, 2020 • 1 new comment

• QST:bug or not? silent fail of df.iloc[].loc[] = newDataType

  #37333 commented on Dec 23, 2020 • 1 new comment

• pd.concat() crashes if dataframe contains duplicate indices but not df.join()

  #36263 commented on Dec 24, 2020 • 1 new comment

• Merge with how='inner' does not always preserve the order of the left keys

  #18776 commented on Dec 25, 2020 • 1 new comment

• pd.set_option("io.excel.xlsx.reader", "openpyxl") does not work

  #34252 commented on Dec 26, 2020 • 1 new comment

• ENH: Auto Detect engine in read_excel

  #35416 commented on Dec 26, 2020 • 1 new comment

• BUG: loc with empty multiindex raises exception

  #36936 commented on Dec 27, 2020 • 1 new comment

• BUG: Index with right_index=True or left_index=True merge

  #34468 commented on Dec 27, 2020 • 1 new comment

• ENH: allow for top and mid-level assignment to DataFrames with MultIndex columns #7475

  #36755 commented on Dec 21, 2020 • 1 new comment

• ENH: enable Series.info()

  #37320 commented on Dec 25, 2020 • 1 new comment

• DOC: make RST files conform to pandas token usage

  #37393 commented on Dec 27, 2020 • 1 new comment

• ENH: named agg with multiple columns

  #37627 commented on Dec 23, 2020 • 1 new comment

• BUG: Fix bug in loc setitem changing the dtype when condition is False

  #37672 commented on Dec 21, 2020 • 1 new comment

• BUG: Bug in loc raised ValueError when setting value via boolean list

  #37761 commented on Dec 21, 2020 • 1 new comment

• BUG: Bug in DataFrame.loc for setitem changed dtype when setting more than one column

  #37798 commented on Dec 23, 2020 • 1 new comment

• BUG: rowLabels and colLabels args in pandas.plotting.table have no effect (#37811)

  #37894 commented on Dec 24, 2020 • 1 new comment

• TYP: __getitem__ method of EA (2nd pass)

  #37921 commented on Dec 24, 2020 • 1 new comment

• ENH: str extract with default value

  #38003 commented on Dec 22, 2020 • 1 new comment

• DOC: Add examples for filling missing data

  #38163 commented on Dec 20, 2020 • 1 new comment

• TYP: handle mypy ignore in SelectionMixin

  #38239 commented on Dec 22, 2020 • 1 new comment

• ENH: make "closed" part of IntervalDtype

  #38394 commented on Dec 22, 2020 • 1 new comment

• BUG: df.rename raises when multiindex has duplicates

  #38015 commented on Dec 20, 2020 • 0 new comments

• different behaviour of df.isin() in 1.0.5/1.1.0, when df contains None

  #35565 commented on Dec 20, 2020 • 0 new comments

• read_excel opimize nrows

  #32727 commented on Dec 20, 2020 • 0 new comments

• DataFrame.replace changes dtype of columns not containing any value to be replaced.

  #30512 commented on Dec 20, 2020 • 0 new comments

• Unexpected to_dict output after upgrading to 0.24.1

  #25408 commented on Dec 20, 2020 • 0 new comments

• DOC: name not defined in section "2.14.1 Basic plotting: plot"

  #38451 commented on Dec 21, 2020 • 0 new comments

• pd.Timestamp.isoformat does not implement keyword timespec

  #26131 commented on Dec 21, 2020 • 0 new comments

• BUG: multiple application of .loc on sparse DataFrame results in NaN and filling the DataFrame

  #34687 commented on Dec 21, 2020 • 0 new comments

• pd.read_table: Using space as delimiter on file with trailing space gives cryptic error

  #21768 commented on Dec 21, 2020 • 0 new comments

• Equivalent to the Excel fill handle

  #22993 commented on Dec 21, 2020 • 0 new comments

• BUG: Executing SQL containing non-escaped percent sign fails without parameters

  #34211 commented on Dec 22, 2020 • 0 new comments

• BUG: DataFrame.to_json ignores index if it is repeated in the DataFrame.

  #37600 commented on Dec 22, 2020 • 0 new comments

• Groupby behaviour of missing zeros

  #28572 commented on Dec 22, 2020 • 0 new comments

• BUG: ExtensionArray with 2D datetime64 values errors on display formatting

  #38390 commented on Dec 22, 2020 • 0 new comments

• BUG: Multiindex.nunique raises NotImplementedError

  #34019 commented on Dec 22, 2020 • 0 new comments

• Partial Selection on MultiIndex: The need for empty slice support & dict indexing

  #4036 commented on Dec 23, 2020 • 0 new comments

• High Memory Usage when Concatenating Partially Indexed Series to Multiindexed Dataframe

  #20803 commented on Dec 23, 2020 • 0 new comments

• ENH: add masked algorithm for mean()

  #34754 commented on Dec 23, 2020 • 0 new comments

• BUG: Index.where vs Series.where mismatch

  #37682 commented on Dec 23, 2020 • 0 new comments

• BUG: OutOfBoundsTimedelta not raised for out-of-bounds Timedelta

  #36615 commented on Dec 23, 2020 • 0 new comments

• BUG: PyMysql : module 'sqlalchemy' has no attribute 'engine'

  #37698 commented on Dec 23, 2020 • 0 new comments

• BUG: inconsisten multi-level indexing when levels are dropped

  #10521 commented on Dec 24, 2020 • 0 new comments

• CI: migrate from travis-ci.org to travis-ci.com

  #37765 commented on Dec 24, 2020 • 0 new comments

• BUG: in read_excel for mangled columns only the original/first column dtype is correct, col.N is not parsed correctly

  #35211 commented on Dec 25, 2020 • 0 new comments

• QST: Integrate a function with pandas and scipy.integrate.quad

  #34482 commented on Dec 25, 2020 • 0 new comments

• DEPR: log of deprecations in 1.x (to be removed in 2.0)

  #30228 commented on Dec 26, 2020 • 0 new comments

• pd.read_json May Not Maintain Numeric String Index

  #28556 commented on Dec 26, 2020 • 0 new comments

• Bug: groupby with sort=False creates buggy MultiIndex

  #32259 commented on Dec 26, 2020 • 0 new comments

• BUG: pivot broken on the latest version 1.1.0

  #35785 commented on Dec 26, 2020 • 0 new comments

• Truncate columns list to match tr_frame for correct dict formatters lookup

  #35907 commented on Dec 20, 2020 • 0 new comments

• TYP: pandas/core/missing.py

  #38339 commented on Dec 22, 2020 • 0 new comments

• Extend check namespace usage

  #38347 commented on Dec 20, 2020 • 0 new comments

• ENH: support none in header list #37625

  #38515 commented on Dec 22, 2020 • 0 new comments

• BUG: read_excel forward-filling MI names

  #38517 commented on Dec 25, 2020 • 0 new comments