How to create new json object from a dict in python?

Question

What is the best way to create a dict, with some attributes, from another dict, in Python?

For example, suppose I have the following dict:

dict1 = { "name": "Juan", "lastname": "Gonzalez", "swimming": "yes", "soccer": "no"}

I would like to obtain:

dict2 = { "name": "Juan", "lastname": "Gonzalez", "hobbies": {"swimming": "yes", "soccer": "no"}}

Which I only need to add the "hobbies"

What does this have to do with JSON? The title is about JSON, but the question itself is about transforming the dictionary. Which one is it? — ForceBru
– ForceBru, Commented Apr 21, 2022 at 9:24
What can vary? Is the dictionary always in the form {"name": ..., 'lastname": ..., "swimming": ..., "soccer": ...} or do you want to extract all keys other than "name" and "lastname", or something else? — Jasmijn
– Jasmijn, Commented Apr 21, 2022 at 9:26
Do you want to put all keys in dict1 that are not 'name' or 'lastname' into hobbies? — Sri
– Sri, Commented Apr 21, 2022 at 9:28
@ForceBru You are right I would like to transform the dict1 to dict2.. — Lenin Espindola
– Lenin Espindola, Commented Apr 21, 2022 at 9:29

Jasmijn · Accepted Answer · 2022-04-21 09:37:37Z

2

The easy answer:

dict2 = {"name": dict1["name"], "lastname": dict1["lastname"], hobbies: {"swimming": dict1["swimming"], "soccer": dict1["socccer"]}}

A more flexible answer:

toplevel_keys = ['name', 'lastname']
hobbies_keys = ['swimming', 'soccer']
dict2 = {key: dict1[key] for key in toplevel_keys}
dict2['hobbies'] = {key: dict1[key] for key in hobbies_keys}

answered Apr 21, 2022 at 9:37

Jasmijn

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2 Comments

Lenin Espindola Over a year ago

Hello again, what if the dict 2 hat different keys for some persons? what could you recommend me?

Jasmijn Over a year ago

It depends on which keys are different. I can't really help you further without knowing more.

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