python difference two dates in years

gistfile1.txt

import datetime
d1_date_str='29/08/1962'
d2_date_str= '06/06/1968'
d1_date_obj=datetime.datetime.strptime(d1_date_str, '%d/%m/%Y')
print(d1_date_obj.date())
d2_date_obj=datetime.datetime.strptime(d2_date_str, '%d/%m/%Y')
print(d2_date_obj.date())
#create datetime.timedelta object
diff = d2_date_obj - d1_date_obj
print(type(diff))
diff_days = diff.days
print(diff_days)
diff_years = round(diff_days/365)
print(diff_years)