Pandas 1.0

Previously, pandas would register converters with matplotlib as a side effect of importing pandas (GH18720). This changed the output of plots made via matplotlib plots after pandas was imported, even if you were using matplotlib directly rather than plot().

• Removed the previously deprecated keyword “index” from read_stata(), StataReader, and StataReader.read(), use “index_col” instead (GH17328)

• Removed StataReader.data method, use StataReader.read() instead (GH9493)

• Removed pandas.plotting._matplotlib.tsplot, use Series.plot() instead (GH19980)

• pandas.tseries.converter.register has been moved to pandas.plotting.register_matplotlib_converters() (GH18307)

• Series.plot() no longer accepts positional arguments, pass keyword arguments instead (GH30003)

• DataFrame.hist() and Series.hist() no longer allows figsize="default", specify figure size by passinig a tuple instead (GH30003)

• Floordiv of integer-dtyped array by Timedelta now raises TypeError (GH21036)

• TimedeltaIndex and DatetimeIndex no longer accept non-nanosecond dtype strings like “timedelta64” or “datetime64”, use “timedelta64[ns]” and “datetime64[ns]” instead (GH24806)

• Changed the default “skipna” argument in pandas.api.types.infer_dtype() from False to True (GH24050)

• Removed Series.ix and DataFrame.ix (GH26438)

• Removed Index.summary (GH18217)

• Removed the previously deprecated keyword “fastpath” from the Index constructor (GH23110)

• Removed Series.get_value, Series.set_value, DataFrame.get_value, DataFrame.set_value (GH17739)

• Removed Series.compound and DataFrame.compound (GH26405)

• Changed the default “inplace” argument in DataFrame.set_index() and Series.set_axis() from None to False (GH27600)

• Removed Series.cat.categorical, Series.cat.index, Series.cat.name (GH24751)

• Removed the previously deprecated keyword “box” from to_datetime() and to_timedelta(); in addition these now always returns DatetimeIndex, TimedeltaIndex, Index, Series, or DataFrame (GH24486)

• to_timedelta(), Timedelta, and TimedeltaIndex no longer allow “M”, “y”, or “Y” for the “unit” argument (GH23264)

• Removed the previously deprecated keyword “time_rule” from (non-public) offsets.generate_range, which has been moved to core.arrays._ranges.generate_range() (GH24157)

• DataFrame.loc() or Series.loc() with listlike indexers and missing labels will no longer reindex (GH17295)

• DataFrame.to_excel() and Series.to_excel() with non-existent columns will no longer reindex (GH17295)

• Removed the previously deprecated keyword “join_axes” from concat(); use reindex_like on the result instead (GH22318)

• Removed the previously deprecated keyword “by” from DataFrame.sort_index(), use DataFrame.sort_values() instead (GH10726)

• Removed support for nested renaming in DataFrame.aggregate(), Series.aggregate(), core.groupby.DataFrameGroupBy.aggregate(), core.groupby.SeriesGroupBy.aggregate(), core.window.rolling.Rolling.aggregate() (GH18529)

• Passing datetime64 data to TimedeltaIndex or timedelta64 data to DatetimeIndex now raises TypeError (GH23539, GH23937)

• Passing int64 values to DatetimeIndex and a timezone now interprets the values as nanosecond timestamps in UTC, not wall times in the given timezone (GH24559)

• A tuple passed to DataFrame.groupby() is now exclusively treated as a single key (GH18314)

• Removed Index.contains, use key in index instead (GH30103)

• Addition and subtraction of int or integer-arrays is no longer allowed in Timestamp, DatetimeIndex, TimedeltaIndex, use obj + n * obj.freq instead of obj + n (GH22535)

• Removed Series.ptp (GH21614)

• Removed Series.from_array (GH18258)

• Removed DataFrame.from_items (GH18458)

• Removed DataFrame.as_matrix, Series.as_matrix (GH18458)

• Removed Series.asobject (GH18477)

• Removed DataFrame.as_blocks, Series.as_blocks, DataFrame.blocks, Series.blocks (GH17656)

• pandas.Series.str.cat() now defaults to aligning others, using join='left' (GH27611)

• pandas.Series.str.cat() does not accept list-likes within list-likes anymore (GH27611)

• Series.where() with Categorical dtype (or DataFrame.where() with Categorical column) no longer allows setting new categories (GH24114)

• Removed the previously deprecated keywords “start”, “end”, and “periods” from the DatetimeIndex, TimedeltaIndex, and PeriodIndex constructors; use date_range(), timedelta_range(), and period_range() instead (GH23919)

• Removed the previously deprecated keyword “verify_integrity” from the DatetimeIndex and TimedeltaIndex constructors (GH23919)

• Removed the previously deprecated keyword “fastpath” from pandas.core.internals.blocks.make_block (GH19265)

• Removed the previously deprecated keyword “dtype” from Block.make_block_same_class() (GH19434)

• Removed ExtensionArray._formatting_values. Use ExtensionArray._formatter instead. (GH23601)

• Removed MultiIndex.to_hierarchical (GH21613)

• Removed MultiIndex.labels, use MultiIndex.codes instead (GH23752)

• Removed the previously deprecated keyword “labels” from the MultiIndex constructor, use “codes” instead (GH23752)

• Removed MultiIndex.set_labels, use MultiIndex.set_codes() instead (GH23752)

• Removed the previously deprecated keyword “labels” from MultiIndex.set_codes(), MultiIndex.copy(), MultiIndex.drop(), use “codes” instead (GH23752)

• Removed support for legacy HDF5 formats (GH29787)

• Passing a dtype alias (e.g. ‘datetime64[ns, UTC]’) to DatetimeTZDtype is no longer allowed, use DatetimeTZDtype.construct_from_string() instead (GH23990)

• Removed the previously deprecated keyword “skip_footer” from read_excel(); use “skipfooter” instead (GH18836)

• read_excel() no longer allows an integer value for the parameter usecols, instead pass a list of integers from 0 to usecols inclusive (GH23635)

• Removed the previously deprecated keyword “convert_datetime64” from DataFrame.to_records() (GH18902)

• Removed IntervalIndex.from_intervals in favor of the IntervalIndex constructor (GH19263)

• Changed the default “keep_tz” argument in DatetimeIndex.to_series() from None to True (GH23739)

• Removed api.types.is_period and api.types.is_datetimetz (GH23917)

• Ability to read pickles containing Categorical instances created with pre-0.16 version of pandas has been removed (GH27538)

• Removed pandas.tseries.plotting.tsplot (GH18627)

• Removed the previously deprecated keywords “reduce” and “broadcast” from DataFrame.apply() (GH18577)

• Removed the previously deprecated assert_raises_regex function in pandas._testing (GH29174)

• Removed the previously deprecated FrozenNDArray class in pandas.core.indexes.frozen (GH29335)

• Removed the previously deprecated keyword “nthreads” from read_feather(), use “use_threads” instead (GH23053)

• Removed Index.is_lexsorted_for_tuple (GH29305)

• Removed support for nested renaming in DataFrame.aggregate(), Series.aggregate(), core.groupby.DataFrameGroupBy.aggregate(), core.groupby.SeriesGroupBy.aggregate(), core.window.rolling.Rolling.aggregate() (GH29608)

• Removed Series.valid; use Series.dropna() instead (GH18800)

• Removed DataFrame.is_copy, Series.is_copy (GH18812)

• Removed DataFrame.get_ftype_counts, Series.get_ftype_counts (GH18243)

• Removed DataFrame.ftypes, Series.ftypes, Series.ftype (GH26744)

• Removed Index.get_duplicates, use idx[idx.duplicated()].unique() instead (GH20239)

• Removed Series.clip_upper, Series.clip_lower, DataFrame.clip_upper, DataFrame.clip_lower (GH24203)

• Removed the ability to alter DatetimeIndex.freq, TimedeltaIndex.freq, or PeriodIndex.freq (GH20772)

• Removed DatetimeIndex.offset (GH20730)

• Removed DatetimeIndex.asobject, TimedeltaIndex.asobject, PeriodIndex.asobject, use astype(object) instead (GH29801)

• Removed the previously deprecated keyword “order” from factorize() (GH19751)

• Removed the previously deprecated keyword “encoding” from read_stata() and DataFrame.to_stata() (GH21400)

• Changed the default “sort” argument in concat() from None to False (GH20613)

• Removed the previously deprecated keyword “raise_conflict” from DataFrame.update(), use “errors” instead (GH23585)

• Removed the previously deprecated keyword “n” from DatetimeIndex.shift(), TimedeltaIndex.shift(), PeriodIndex.shift(), use “periods” instead (GH22458)

• Removed the previously deprecated keywords “how”, “fill_method”, and “limit” from DataFrame.resample() (GH30139)

• Passing an integer to Series.fillna() or DataFrame.fillna() with timedelta64[ns] dtype now raises TypeError (GH24694)

• Passing multiple axes to DataFrame.dropna() is no longer supported (GH20995)

• Removed Series.nonzero, use to_numpy().nonzero() instead (GH24048)

• Passing floating dtype codes to Categorical.from_codes() is no longer supported, pass codes.astype(np.int64) instead (GH21775)

• Removed the previously deprecated keyword “pat” from Series.str.partition() and Series.str.rpartition(), use “sep” instead (GH23767)

• Removed Series.put (GH27106)

• Removed Series.real, Series.imag (GH27106)

• Removed Series.to_dense, DataFrame.to_dense (GH26684)

• Removed Index.dtype_str, use str(index.dtype) instead (GH27106)

• Categorical.ravel() returns a Categorical instead of a ndarray (GH27199)

• The ‘outer’ method on Numpy ufuncs, e.g. np.subtract.outer operating on Series objects is no longer supported, and will raise NotImplementedError (GH27198)

• Removed Series.get_dtype_counts and DataFrame.get_dtype_counts (GH27145)

• Changed the default “fill_value” argument in Categorical.take() from True to False (GH20841)

• Changed the default value for the raw argument in Series.rolling().apply(), DataFrame.rolling().apply(), Series.expanding().apply(), and DataFrame.expanding().apply() from None to False (GH20584)

• Removed deprecated behavior of Series.argmin() and Series.argmax(), use Series.idxmin() and Series.idxmax() for the old behavior (GH16955)

• Passing a tz-aware datetime.datetime or Timestamp into the Timestamp constructor with the tz argument now raises a ValueError (GH23621)

• Removed Series.base, Index.base, Categorical.base, Series.flags, Index.flags, PeriodArray.flags, Series.strides, Index.strides, Series.itemsize, Index.itemsize, Series.data, Index.data (GH20721)

• Changed Timedelta.resolution() to match the behavior of the standard library datetime.timedelta.resolution, for the old behavior, use Timedelta.resolution_string() (GH26839)

• Removed Timestamp.weekday_name, DatetimeIndex.weekday_name, and Series.dt.weekday_name (GH18164)

• Removed the previously deprecated keyword “errors” in Timestamp.tz_localize(), DatetimeIndex.tz_localize(), and Series.tz_localize() (GH22644)

• Changed the default “ordered” argument in CategoricalDtype from None to False (GH26336)

• Series.set_axis() and DataFrame.set_axis() now require “labels” as the first argument and “axis” as an optional named parameter (GH30089)

• Removed to_msgpack, read_msgpack, DataFrame.to_msgpack, Series.to_msgpack (GH27103)

• Removed Series.compress (GH21930)

• Removed the previously deprecated keyword “fill_value” from Categorical.fillna(), use “value” instead (GH19269)

• Removed the previously deprecated keyword “data” from andrews_curves(), use “frame” instead (GH6956)

• Removed the previously deprecated keyword “data” from parallel_coordinates(), use “frame” instead (GH6956)

• Removed the previously deprecated keyword “colors” from parallel_coordinates(), use “color” instead (GH6956)

• Removed the previously deprecated keywords “verbose” and “private_key” from read_gbq() (GH30200)

• Calling np.array and np.asarray on tz-aware Series and DatetimeIndex will now return an object array of tz-aware Timestamp (GH24596)

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