Given a dictionary like so:
my_map = {\'a\': 1, \'b\': 2}
How can one invert this map to get:
inv_map = {1: \'a\', 2: \'b\'
Try this:
inv_map = dict(zip(my_map.values(), my_map.keys()))
(Note that the Python docs on dictionary views explicitly guarantee that .keys()
and .values()
have their elements in the same order, which allows the approach above to work.)
Alternatively:
inv_map = dict((my_map[k], k) for k in my_map)
or using python 3.0's dict comprehensions
inv_map = {my_map[k] : k for k in my_map}