Version 0.19.2 (December 24, 2016)#
This is a minor bug-fix release in the 0.19.x series and includes some small regression fixes, bug fixes and performance improvements. We recommend that all users upgrade to this version.
Highlights include:
Compatibility with Python 3.6
Added a Pandas Cheat Sheet. (GH13202).
What’s new in v0.19.2
Enhancements#
The pd.merge_asof()
, added in 0.19.0, gained some improvements:
Performance improvements#
Bug fixes#
Compat with python 3.6 for pickling of some offsets (GH14685)
Compat with python 3.6 for some indexing exception types (GH14684, GH14689)
Compat with python 3.6 for deprecation warnings in the test suite (GH14681)
Compat with python 3.6 for Timestamp pickles (GH14689)
Compat with
dateutil==2.6.0
; segfault reported in the testing suite (GH14621)Allow
nanoseconds
inTimestamp.replace
as a kwarg (GH14621)Bug in
pd.read_csv
in which aliasing was being done forna_values
when passed in as a dictionary (GH14203)Bug in
pd.read_csv
in which column indices for a dict-likena_values
were not being respected (GH14203)Bug in
pd.read_csv
where reading files fails, if the number of headers is equal to the number of lines in the file (GH14515)Bug in
pd.read_csv
for the Python engine in which an unhelpful error message was being raised when multi-char delimiters were not being respected with quotes (GH14582)Fix bugs (GH14734, GH13654) in
pd.read_sas
andpandas.io.sas.sas7bdat.SAS7BDATReader
that caused problems when reading a SAS file incrementally.Bug in
pd.read_csv
for the Python engine in which an unhelpful error message was being raised whenskipfooter
was not being respected by Python’s CSV library (GH13879)Bug in
.fillna()
in which timezone aware datetime64 values were incorrectly rounded (GH14872)Bug in
.groupby(..., sort=True)
of a non-lexsorted MultiIndex when grouping with multiple levels (GH14776)Bug in
pd.cut
with negative values and a single bin (GH14652)Bug in
pd.to_numeric
where a 0 was not unsigned on adowncast='unsigned'
argument (GH14401)Bug in plotting regular and irregular timeseries using shared axes (
sharex=True
orax.twinx()
) (GH13341, GH14322).Bug in not propagating exceptions in parsing invalid datetimes, noted in python 3.6 (GH14561)
Bug in resampling a
DatetimeIndex
in local TZ, covering a DST change, which would raiseAmbiguousTimeError
(GH14682)Bug in indexing that transformed
RecursionError
intoKeyError
orIndexingError
(GH14554)Bug in
HDFStore
when writing aMultiIndex
when usingdata_columns=True
(GH14435)Bug in
HDFStore.append()
when writing aSeries
and passing amin_itemsize
argument containing a value for theindex
(GH11412)Bug when writing to a
HDFStore
intable
format with amin_itemsize
value for theindex
and without asking to append (GH10381)Bug in
Series.groupby.nunique()
raising anIndexError
for an emptySeries
(GH12553)Bug in
DataFrame.nlargest
andDataFrame.nsmallest
when the index had duplicate values (GH13412)Bug in clipboard functions on linux with python2 with unicode and separators (GH13747)
Bug in clipboard functions on Windows 10 and python 3 (GH14362, GH12807)
Bug in
.to_clipboard()
and Excel compat (GH12529)Bug in
DataFrame.combine_first()
for integer columns (GH14687).Bug in
pd.read_csv()
in which thedtype
parameter was not being respected for empty data (GH14712)Bug in
pd.read_csv()
in which thenrows
parameter was not being respected for large input when using the C engine for parsing (GH7626)Bug in
pd.merge_asof()
could not handle timezone-aware DatetimeIndex when a tolerance was specified (GH14844)Explicit check in
to_stata
andStataWriter
for out-of-range values when writing doubles (GH14618)Bug in
.plot(kind='kde')
which did not drop missing values to generate the KDE Plot, instead generating an empty plot. (GH14821)Bug in
unstack()
if called with a list of column(s) as an argument, regardless of the dtypes of all columns, they get coerced toobject
(GH11847)
Contributors#
A total of 33 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time.
Ajay Saxena +
Ben Kandel
Chris
Chris Ham +
Christopher C. Aycock
Daniel Himmelstein +
Dave Willmer +
Dr-Irv
Jeff Carey +
Jeff Reback
Joe Jevnik
Joris Van den Bossche
Julian Santander +
Kerby Shedden
Keshav Ramaswamy
Kevin Sheppard
Luca Scarabello +
Matt Roeschke +
Matti Picus +
Maximilian Roos
Mykola Golubyev +
Nate Yoder +
Nicholas Ver Halen +
Pawel Kordek
Pietro Battiston
Rodolfo Fernandez +
Tara Adiseshan +
Tom Augspurger
Yaroslav Halchenko
gfyoung
hesham.shabana@hotmail.com +
sinhrks
wandersoncferreira +