How Can I Reverse a Dictionary's Key-Value Mapping in Python?

Inverting a Dictionary Mapping

Given a dictionary that maps keys to values, there may be a need to invert the mapping, switching the roles of keys and values. Here's how this can be achieved in Python:

Solution:

Python provides a convenient method to invert a dictionary using a dictionary comprehension:

Python 3 :

inv_map = {v: k for k, v in my_map.items()}

Python 2:

inv_map = {v: k for k, v in my_map.iteritems()}

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