Python - Append dictionary in dictionary

Question

I am new to python and have a perhaps basic question.. I have a dictionary, and want to add another dictionary to a key in the first dictionary :)

So currently the dictionary look like this:

{
    "name": "custname",
    "slug": "custslug",
    "group": "1"
}

And I need it to "append" another dictionary to an existing.. I guess It is a nested dictionary I need.

{
    "name": "custname",
    "slug": "custslug",
    "custom_fields": {
        "NavID": "10023"
    },
    "group": "1",
 }

Do you mean https://stackoverflow.com/questions/1024847/how-can-i-add-new-keys-to-a-dictionary or https://stackoverflow.com/questions/38987/how-do-i-merge-two-dictionaries-in-a-single-expression-in-python? — mercator, Jun 20 '20 at 17:04

score 3 · Answer 1 · answered Jun 20 '20 at 17:01

3

In case you want a nested dictionary use the below method -

d1 = {"name": "custname","slug": "custslug","group": "1"}
d1["custom_fields"] = {"NavID": "10023"}
print(d1)

This will give the output you wanted.

Or if you want to merge two dictionaries and update the values, you may use the update method.

d1 = {"name": "custname","slug": "custslug","group": "1"}
d2 = {"NavID": "10023"}
d1.update(d2)

The output here will be

{"name": "custname","slug": "custslug","group": "1","NavID": "10023"}

answered Jun 20 '20 at 17:01

Ayush Jain

154
1
7

Second dictionary is not a nested dictionary. This is not what OP meant. – Prashant Kumar Jun 20 '20 at 17:07
But when I convert my data frame to a dict with this line new_tenants = nav_kunder.to_dict(orient='records') I then get a TypeError: list indices must be integers or slices, not str when I use your first suggestion – Mathias Moesgaard Jun 20 '20 at 17:10
1

I was also confused with what the question asked.. So I came up with both update method and assigning the second dictionary to a key of the first dictionary and thus making it a nested dictionary. – Ayush Jain Jun 20 '20 at 17:13

score 2 · Answer 2 · edited Jun 20 '20 at 17:06

2

dict = {
    "name": "custname",
    "slug": "custslug",
    "group": "1"
}

another_dict = {
        "NavID": "10023"
    }

dict['Custom_fields'] = another_dict

edited Jun 20 '20 at 17:06

Prashant Kumar

2,057
2
9
22

answered Jun 20 '20 at 17:02

Rohit S K

1,178
3
13

Second dictionary is not a nested dictionary. – Prashant Kumar Jun 20 '20 at 17:05
i have added another dictionary to a key in the first dictionary in order to get a nested dictionary as asked in question – Rohit S K Jun 20 '20 at 17:12

score 0 · Answer 3 · answered Jun 20 '20 at 16:58

0

Great question! This will work.

d1 = {
    "name": "custname",
    "slug": "custslug",
    "group": "1"
}
d2 = {"NavID": "10023"}
d1["custom_fields"] = d2

answered Jun 20 '20 at 16:58

JimmyCarlos

1,934
1
10
24

This is not what OP meant in his question I think. He says the second dictionary is a nested dictionary. You are adding a dictionary explicitly to a key. I think you should clarify once. – Prashant Kumar Jun 20 '20 at 17:03

score 0 · Answer 4 · answered Jun 20 '20 at 17:02

If you want to append or merge 2 dictionaries, you can use update method.

Below is how you can do it :

d1 = {
    "name": "custname",
    "slug": "custslug",
    "group": "1"
}
d2 = {"custom_fields": {"NavID": "10023"}}


d1.update(d2)

print(d1)

OUTPUT :

>>> {'group': '1', 'name': 'custname', 'custom_fields': {'NavID': '10023'}, 'slug': 'custslug'}

Python - Append dictionary in dictionary

4 Answers4