Insert dictionary to list of dictionary python

Question

How can I insert a dictionary to list of dictionary?

newDict = [{'id': 1}, {'id': 2}]

myData = [{'title': 'Bar', 'barname': 'Archer}, {'title': 'Bar', 'barname': 'Archer}]

output:

[{'id': 1, 'title': 'Bar', 'barname': 'Archer}, {'id': 2, 'title': 'Bar', 'barname': 'Archer'}]

Asked By: Cason Mercadejas

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Source

Answer 1

You can use zip and dictionary unpacking:

[{**dict_1, **dict_2} for dict_1, dict_2 in zip(newDict, myData)]

[{'id': 1, 'title': 'Bar', 'barname': 'Archer'},
 {'id': 2, 'title': 'Bar', 'barname': 'Archer'}]

(or dict_1 | dict_2 starting from Python 3.9)

In case the ids in newDict are meant to index the elements of myData (1-based):

[{**id_select, **myData[id_select["id"] - 1]} for id_select in newDict]

Answered By: mcsoini

Answer 2

Using loops you can do it this way:

for n in range(min(len(newDict),len(myData))):
    new,my=newDict[n],myData[n]
    for key in my:
        new[key] = my[key]

After this your desired output==newDict. You should also think of how you want to deal with duplicate keys if that’s a possibility.

Answered By: bjdev

Insert dictionary to list of dictionary python

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