What’s new in 1.1.4 (October 30, 2020)¶
These are the changes in pandas 1.1.4. See Release notes for a full changelog including other versions of pandas.
Fixed regressions¶
Fixed regression in
read_csv()
raising aValueError
whennames
was of typedict_keys
(GH36928)Fixed regression in
read_csv()
with more than 1M rows and specifying aindex_col
argument (GH37094)Fixed regression where attempting to mutate a
DateOffset
object would no longer raise anAttributeError
(GH36940)Fixed regression where
DataFrame.agg()
would fail withTypeError
when passed positional arguments to be passed on to the aggregation function (GH36948).Fixed regression in
RollingGroupby
withsort=False
not being respected (GH36889)Fixed regression in
Series.astype()
convertingNone
to"nan"
when casting to string (GH36904)Fixed regression in
Series.rank()
method failing for read-only data (GH37290)Fixed regression in
RollingGroupby
causing a segmentation fault with Index of dtype object (GH36727)Fixed regression in
DataFrame.resample(...).apply(...)()
raisedAttributeError
when input was aDataFrame
and only aSeries
was evaluated (GH36951)Fixed regression in
DataFrame.groupby(..).std()
with nullable integer dtype (GH37415)Fixed regression in
PeriodDtype
comparing both equal and unequal to its string representation (GH37265)Fixed regression where slicing
DatetimeIndex
raisedAssertionError
on irregular time series withpd.NaT
or on unsorted indices (GH36953 and GH35509)Fixed regression in certain offsets (
pd.offsets.Day()
and below) no longer being hashable (GH37267)Fixed regression in
StataReader
which requiredchunksize
to be manually set when using an iterator to read a dataset (GH37280)Fixed regression in setitem with
DataFrame.iloc()
which raised error when trying to set a value while filtering with a boolean list (GH36741)Fixed regression in setitem with a Series getting aligned before setting the values (GH37427)
Fixed regression in
MultiIndex.is_monotonic_increasing
returning wrong results withNaN
in at least one of the levels (GH37220)Fixed regression in inplace arithmetic operation on a Series not updating the parent DataFrame (GH36373)
Bug fixes¶
Bug causing
groupby(...).sum()
and similar to not preserve metadata (GH29442)Bug in
Series.isin()
andDataFrame.isin()
raising aValueError
when the target was read-only (GH37174)Bug in
GroupBy.fillna()
that introduced a performance regression after 1.0.5 (GH36757)Bug in
DataFrame.info()
was raising aKeyError
when the DataFrame has integer column names (GH37245)Bug in
DataFrameGroupby.apply()
would drop aCategoricalIndex
when grouped on (GH35792)
Contributors¶
A total of 18 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time.
Daniel Saxton
Fangchen Li
Janus +
Joris Van den Bossche
Kevin Sheppard
Marco Gorelli
Matt Roeschke
Matthew Roeschke
MeeseeksMachine
Pandas Development Team
Paul Ganssle
Richard Shadrach
Simon Hawkins
Thomas Smith
Tobias Pitters
abmyii +
jbrockmendel
patrick