Append values with different lengths from one dictionary to another

Question

I have a dictionary with list values of a different length. I’m needed to get the values that are in the same position associated to the same key in a new dictionary.

Original Dictionay {A: [1,2] , B: [3,4,5]}

New Dictionary: {A: [1,3], B: [2,4], C: [5]}

I tried a for loop and wrapping my values in zip_longest, but am still getting a list index out of range error.

for x in range(1, max([len(v) for v in sub_folder_notebooks.values()])):
    notebook_step[x] = zip_longest([elem[x] for elem in sub_folder_notebooks.values()])

Asked By: cmilligan262

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Answer 1

I would add a condition when looping through the values of the dict sub_folder_notebooks to make sure that you can access elem[x]. not the nicest way but should do the trick:

for x in range(0, max([len(v) for v in sub_folder_notebooks.values()])):
notebook_step[x] = zip_longest([elem[x] for elem in sub_folder_notebooks.values() if len(elem)>x])

I start from x=0 because you want to have the first element as well.

Answered By: sos

Append values with different lengths from one dictionary to another

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