switching keys and values in a dictionary in python

Question

Say I have a dictionary like so:

my_dict = {2:3, 5:6, 8:9}

Is there a way that I can switch the keys and values to get:

{3:2, 6:5, 9:8}

Answer 1

For Python 3:

my_dict2 = {y: x for x, y in my_dict.items()}

For Python 2, you can use

my_dict2 = dict((y, x) for x, y in my_dict.iteritems())