Skip to content
Related Articles
Get the best out of our app
GeeksforGeeks App
Open App

Related Articles

Converting MultiDict to proper JSON

Improve Article
Save Article
Like Article
Improve Article
Save Article
Like Article

In this article, we will see what is MultiDict, and how do we convert a multidict into JSON files in Python.

First, we will convert a multidict to a dictionary data type, and at last, we dump that dictionary into a JSON file.

Functions Used : 

  • json.dump(): JSON module in Python module provides a method called dump() which converts the Python objects into appropriate JSON objects. It is a slight variant of the dumps() method.

Syntax : json.dump(d, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, cls=None, indent=None, separators=None)


indent: It improves the readability of the JSON file. The possible values that can be passed to this parameter are simply double 

quotes(“”), any integer values. Simple double quotes make every key-value pair appear in a new line.

Example :

json.dump(dic,file_name, indent=4)

  • Converting MultiDict to proper JSONMultiDict: It is a class that is present in multidict python module

Syntax : 

  • multidict.MultiDict(**kwargs)
  • multidict.MultiDict(mapping, **kwargs)
  • multidict.MultiDict(iterable, **kwargs)

Return : 

  • It will create a mutable multidict instance.
  • It has all the same functions that are available for dictionaries.

Example : 

from multidict import MultiDict

dic = [(‘geeks’, 1), (‘for’,2), (‘nerds’, 3)]

multi_dict = MultiDict(dic)



# import multidict module
from multidict import MultiDict
# import json module
import json
# create multi dict
dic = [('', 'Ram'), ('Student.Age', 20),
       ('Student.Phone', 'xxxxxxxxxx'),
       ('', 'Shyam'), ('Student.Age',18),
       ('Student.Phone', 'yyyyyyyyyy'),
       ('Batch', 'A'), ('Batch_Head', 'XYZ')]
multi_dict = MultiDict(dic)
# get the required dictionary
req_dic = {}
for key, value in multi_dict.items():
      # checking for any nested dictionary
    l = key.split(".")
    # if nested dictionary is present
    if len(l) > 1
        i = l[0]
        j = l[1]
        if req_dic.get(i) is None:
            req_dic[i] = {}
            req_dic[i][j] = []
            if req_dic[i].get(j) is None:
                req_dic[i][j] = []
    else# if single dictionary is there
        if req_dic.get(l[0]) is None:
            req_dic[l[0]] = value
            req_dic[l[0]] = value
# save the dict in json format
with open('multidict.json', 'w') as file:
    json.dump(req_dic, file, indent=4)


<class ‘multidict._multidict.MultiDict’>

<MultiDict(‘’: ‘Ram’, ‘Student.Age’: 20, ‘Student.Phone’: ‘xxxxxxxxxx’, ‘’: ‘Shyam’, ‘Student.Age’: 18, ‘Student.Phone’: ‘yyyyyyyyyy’, ‘Batch’: ‘A’, ‘Batch_Head’: ‘XYZ’)>

JSON file output:

My Personal Notes arrow_drop_up
Last Updated : 02 Dec, 2021
Like Article
Save Article
Similar Reads
Related Tutorials