python - Accessing values in nested dictionary

Question

Nested dictionary has a length of 12, this is one of the records:

{('ALEXANDER', 'MALE'): {'2010': ('2619', None), '2011': ('2494', None), '2009': ('2905', None)}, ...

Main key = ('ALEXANDER', 'MALE')

Main value (which is nested dictionary) = {'2010': ('2619', None), '2011': ('2494', None), '2009': ('2905', None)}

Nested dictionary key/value = '2010': ('2619', None) ...

How would one access the year '2010' and the value '2619'?

Is it possible to do this using variables?

Answer 1

If D = {'2010': ('2619', None), '2011': ('2494', None), '2009': ('2905', None)}

Then D.keys() return the list of keys in the dictionary ['2009', '2011', '2010']

Then you can access to the value 2010 by D.keys()[-1] and to 2619 by D[D.keys()[-1]][0]