使用Python更改“日期中的年份”列，而不更改月份和日期

Question

I have to fix the year in column 'Date Posted'. Some of the dates were mistyped as '2019' instead of '2017' (See Current Dataframe below). Is there a way to fix only the year without changing the month and day? This dataframe is a subset of a huge dataframe and I need to automate the fixing of date error. Please help.

Current Dataframe:

Name                  Date Posted
A                        10-28-2017
A                        10-28-2017
A                        10-26-2017
A                        10-24-2017 
B                        10-02-2019
B                        10-08-2019
B                        10-04-2017
B                        10-05-2019
C                        9-15-2017
C                        9-02-2017 
C                        9-07-2017
C                        9-16-2017

Expected Output:

Name                  Date Posted
A                        10-28-2017
A                        10-28-2017
A                        10-26-2017
A                        10-24-2017 
B                        10-02-2017
B                        10-08-2017
B                        10-04-2017
B                        10-05-2017
C                        9-15-2017
C                        9-02-2017 
C                        9-07-2017
C                        9-16-2017

Answer 1

If your Date Posted columns is in datetime format, can use the replace function. Below should work:

df["Date Posted"].map(lambda x: x.replace(year=2017))