Question

How to invert each key value pair of a dictionary in Python

Answer 1

dic = {'A': 1, 'B': 2, 'C': 3, 'D': 4}
 
dic = {val: key for key, val in dic.items()}

print(dic)




'''
run:

{1: 'A', 2: 'B', 3: 'C', 4: 'D'}


'''

 

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Answer 2

dic = {'A': 1, 'B': 2, 'C': 3, 'D': 4}
 
dic = dict(map(reversed, dic.items()))

print(dic)




'''
run:

{1: 'A', 2: 'B', 3: 'C', 4: 'D'}


'''

 

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