Is there a way to determine if one key is contained within another key, and if so, merge the values of the two keys together?

Is it feasible to determine if a key is contained within another key in a dictionary, and if so, merge the values of the first key into the second key?

For example:

{'0': {'3', '1', '0'}, '3': {'3', '1', '4'}, '1': {'2', '1', '0'}, '5': {'3', '5'}}

Considering that key '0' is within key '1': {'2', '1', '0'}, the values of key '0' would be added to key '1'

{0: {0, 1, 2, 3, 4}, 1: {0, 1, 2, 3}, 3: {0, 1, 2, 3, 4}, 5: {1, 3, 4, 5}}

I have attempted to place the keys into a list and then verify if the values in the list are present in any of the sets for the keys.

Answer №1

To go through each grouping and take advantage of dict.get to retrieve elements based on a key's presence, or revert back to the original item:

d = {0: {3, 1, 0}, 3: {3, 1, 4}, 1: {2, 1, 0}, 5: {3, 5}}
print({k: {c for i in s for c in d.get(i, [i])} for k, [*s] in d.items()})

This display, without any specific order (due to sets being unordered in Python):

{0: {0, 1, 2, 3, 4}, 3: {0, 1, 2, 3, 4}, 1: {0, 1, 2, 3}, 5: {1, 3, 4, 5}}

Test it out here:

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