Python how to replace list in json?

Question

Python

I have such a date
{'trainings': [словарь]
When data['trainings'] = [more than other dictionaries], a double bracket is added
{'trainings': "[больше других словарей]"
What destroys the whole structure, how to avoid this? Take elements from the dictionary and somehow append the list?

Answer 1

>>> import json
>>> a = {"trainings": [{"more": "dicts"}, {"and": "even_more"}]}
>>> json.dumps(a)
'{"trainings": [{"more": "dicts"}, {"and": "even_more"}]}'
>>>