[Python] How to create a dictionary of two pandas DataFrame columns

What is the most efficient way to organise the following pandas Dataframe:

data =

Position Letter
1 a
2 b
3 c
4 d
5 e


into a dictionary like alphabet[1 : 'a', 2 : 'b', 3 : 'c', 4 : 'd', 5 : 'e']?

Continue reading...