Reverse / invert a dictionary mapping

Question

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\'         


        

Answer 1

Try this for python 2.7/3.x

inv_map={};
for i in my_map:
    inv_map[my_map[i]]=i    
print inv_map