. . . . . . . 2020 37 Release Notes 2023 37.1 pandas 0.21.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2023 37.1.1 Thanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2023 37.1.1.1 Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2023 37.2 pandas 0.21.0 . . . . . . . . . . . . . contributed a patch for the first time. 37.1.1.1 Contributors • Aaron Critchley + • Alex Rychyk 2023 pandas: powerful Python data analysis toolkit, Release 0.21.1 • Alexander Buchkovsky + • Alexander

5, 25, 12, 28] >>> index = ['snail', 'pig', 'elephant', (continues on next page) 3.4. DataFrame 2023 pandas: powerful Python data analysis toolkit, Release 1.5.0rc0 2024 Chapter 3. API reference pandas: begin dates. Examples >>> ts = pd.Timestamp(2022, 1, 1) >>> ts + pd.offsets.YearBegin() Timestamp('2023-01-01 00:00:00') Attributes base Returns a copy of the calling offset object with n=1 and all other 11:22:23.682802') In [68]: pd.Timestamp.now() + offsets.DateOffset(years=1) Out[68]: Timestamp('2023-08-24 11:22:23.685001') Changes to Index comparisons Operator equal on Index should behavior similarly

20 BQuarterEnd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2023 3.8.21 BQuarterBegin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . normalize, startingMonth]) DateOffset increments between business Quarter dates. 3.8. Date offsets 2023 pandas: powerful Python data analysis toolkit, Release 1.0.4 pandas.tseries.offsets.BQuarterEnd

Chapter 3. API reference pandas: powerful Python data analysis toolkit, Release 1.4.2 3.4. DataFrame 2023 pandas: powerful Python data analysis toolkit, Release 1.4.2 2024 Chapter 3. API reference pandas: 08:20:33.602289') In [68]: pd.Timestamp.now() + offsets.DateOffset(years=1) Out[68]: Timestamp('2023-04-02 08:20:33.603038') Changes to Index comparisons Operator equal on Index should behavior similarly

DataFrame.hist([column, by, grid, ...]) Make a histogram of the DataFrame's columns. 3.4. DataFrame 2023 pandas: powerful Python data analysis toolkit, Release 1.4.4 2024 Chapter 3. API reference pandas: 10:00:06.413250') In [68]: pd.Timestamp.now() + offsets.DateOffset(years=1) Out[68]: Timestamp('2023-08-31 10:00:06.416117') Changes to Index comparisons Operator equal on Index should behavior similarly

QuarterEnd.rule_code pandas.tseries.offsets.QuarterEnd.freqstr QuarterEnd.freqstr 4.8. Date offsets 2023 pandas: powerful Python data analysis toolkit, Release 1.0.0 pandas.tseries.offsets.QuarterEnd.kwds

>>> g.nth(0) B A 1 NaN 2 3.0 >>> g.nth(1) B A 1 2.0 (continues on next page) 6.11. GroupBy 2023 pandas: powerful Python data analysis toolkit, Release 0.25.0 (continued from previous page) 2

>>> g.nth(0) B A 1 NaN 2 3.0 >>> g.nth(1) B A 1 2.0 (continues on next page) 6.11. GroupBy 2023 pandas: powerful Python data analysis toolkit, Release 0.25.1 (continued from previous page) 2

rule_code pandas.tseries.offsets.LastWeekOfMonth.freqstr LastWeekOfMonth.freqstr 3.8. Date offsets 2023 pandas: powerful Python data analysis toolkit, Release 1.0.5 pandas.tseries.offsets.LastWeekOfMonth

enforce a new Index: >>> idx.to_frame(index=False) animal 0 Ant 1 Bear 2 Cow 3.7. Index objects 2023 pandas: powerful Python data analysis toolkit, Release 1.1.1 To override the name of the resulting