CODEWITHSUNDEEP
python
Tushar
Tushar

Reputation: 21

How to Swap the key of dictionary with its value

I have dictionary

d= {1:[2],2:[3],3:[4]}

i want to swap only a particular key with its values.

so if I want to swap the first key then the dictionary will be

d= {2:[1,3],3:[4]}

how I can achieve this?

I tried

d.iteritems()

but it swaps all the keys of the dictionary.

Thanks in advance. and this is not homework.

Upvotes: 2

Views: 56

Answers (1)

Rakesh
Rakesh

Reputation: 82765

This is one approach dict.pop and dict.setdefault

Ex:

d= {1:[2],2:[3],3:[4]}
key_to_swap = 1

for value in d.pop(key_to_swap):
    d.setdefault(value, []).append(key_to_swap)
print(d)

Upvotes: 1

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