Python identify index on Dictionary with array

Question

I would like to get the index of the following key, value pair:

Key => [CorrectionHistory][Key] Value => 456

{'CorrectionHistory': [{'key': 123, 'CorrectionsAll': [{'CorrChngDesc': 'Discount Line Changed'}, {'CorrChngDesc': 'Commodity Line Changed'}]}, {'key': 456, 'CorrectionsAll': [{'CorrChngDesc': 'AC Added/Modified'}, {'CorrChngDesc': 'CMDY Added/Modified'}]}, {'key': 789, 'CorrectionsAll': [{'CorrChngDesc': 'AC Added/Modified'}]}}

Can someone please throw some light on this?

can you show us your desired output

Jeril
– Jeril

2019-03-15 11:37:36 +00:00
Commented Mar 15, 2019 at 11:37 — Jeril
– Jeril, Commented Mar 15, 2019 at 11:37

Farhan.K · Accepted Answer · 2019-03-15 11:54:47Z

3

I will assume that you have only the CorrectionHistory key as this is your example. In my example the function i wrote is very simple, just to prove is gets the job you mentioned done, but it can be easily generalized:

a = {
        'CorrectionHistory': [
            {'key': 123, 'CorrectionsAll': [{'CorrChngDesc': 'Discount Line Changed'}, {'CorrChngDesc': 'Commodity Line Changed'}]},
            {'key': 456, 'CorrectionsAll': [{'CorrChngDesc': 'AC Added/Modified'}, {'CorrChngDesc': 'CMDY Added/Modified'}]},
            {'key': 789, 'CorrectionsAll': [{'CorrChngDesc': 'AC Added/Modified'}]}
        ]
    }


def get_index_for_key(key):
    for index, item in enumerate(a['CorrectionHistory']):
        if item['key'] == key:
            return index
    return None


print(get_index_for_key(456))

Result: 1 the index you are looking for

Please let me know if this is what you are looking for.

edited Mar 15, 2019 at 11:54

Farhan.K

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answered Mar 15, 2019 at 11:42

Alexandru Martin

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Comments

Alderven · Accepted Answer · 2019-03-15 11:47:01Z

0

Also one liner:

data = {'CorrectionHistory': [{'key': 123, 'CorrectionsAll': [{'CorrChngDesc': 'Discount Line Changed'}, {'CorrChngDesc': 'Commodity Line Changed'}]}, {'key': 456, 'CorrectionsAll': [{'CorrChngDesc': 'AC Added/Modified'}, {'CorrChngDesc': 'CMDY Added/Modified'}]}, {'key': 789, 'CorrectionsAll': [{'CorrChngDesc': 'AC Added/Modified'}]}]}

index = [i for i, x in enumerate(data['CorrectionHistory']) if x['key'] == 456][0]

Output:

answered Mar 15, 2019 at 11:47

Alderven

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