Filtering a datatime set from the starting and ending year with Pandas Numpy Python

How would I be able to write a code that will enable the starting and the ending year in dates. I want to use either pandas or numpy to show the starting and the ending year.

import numpy as np 
import pandas as pd 

dates = ['2017-09-01 00:00:00', '2017-10-01 00:00:00', '2017-11-01 00:00:00', '2017-11-01 00:00:00', '2017-11-01 00:00:00', '2017-12-01 00:00:00', '2018-01-01 00:00:00', '2018-02-01 00:00:00', '2018-03-01 00:00:00', '2018-04-01 00:00:00', '2018-05-01 00:00:00', '2018-06-01 00:00:00', '2018-07-01 00:00:00', '2018-08-01 00:00:00', '2018-09-01 00:00:00', '2018-10-01 00:00:00', '2018-11-01 00:00:00', '2018-12-01 00:00:00', '2018-12-01 00:00:00', '2019-01-01 00:00:00']

Expected Output:

Starting year: 2017
Ending year: 2019

Answer

In your case let us do

pd.Series(pd.to_datetime(dates)).dt.year.agg(StartYear = 'min', EndYear = 'max')
Out[245]: 
StartYear    2017
EndYear      2019
dtype: int64