How to create a value: index dict from a python list?

Question

I have a list:

a = ['a', 'b', 'c']

I want to get the dict:

b = {'a':0, 'b':1, 'c':2}

What is the most pythonic way to get that?

Answer 1

Does the following help you?

b = dict(map(lambda t: (t[1], t[0]), enumerate(a)))

Example:

>>> dict(map(lambda t: (t[1], t[0]), enumerate(['a', 'b', 'c'])))
{'b': 1, 'c': 2, 'a': 0}