import datetime
from dateutil import relativedelta
d1 = datetime.datetime(2020, 5, 19)
d2 = datetime.datetime(2021, 6, 21)
time_difference_details = relativedelta.relativedelta(d1, d2)
print(time_difference_details)
difference_in_years = time_difference_details.years
print(difference_in_years)
'''
run:
relativedelta(years=-1, months=-1, days=-2)
-1
'''