Find out how to convert a MultiDict to nested dictionary utilizing Python

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A MultiDict is a dictionary-like object that holds a number of values for a similar key, making it a helpful knowledge construction for processing varieties and question strings. It’s a subclass of the Python built-in dictionary and behaves equally. In some use circumstances, we might must convert a MultiDict to a nested dictionary, the place every key corresponds to a dictionary of values. On this article, we’ll focus on the steps required to transform a MultiDict to a nested dictionary in Python.

To start with, set up multidict library by writing the next command in your command line or terminal:

pip set up multidict

Steps to transform a MultiDict to a nested dictionary:

  1. Import multidict library
  2. Create a MultiDict utilizing the MultiDict() constructor
  3. Iterate over the objects within the MultiDict
  4. For every merchandise, verify if the important thing already exists within the nested dictionary.
  5. If the important thing exists, append the worth to the checklist of values related to the important thing.
  6. If the important thing doesn’t exist, create a brand new entry within the nested dictionary with the important thing and an inventory of values containing the worth from the MultiDict.

Instance 1:

Within the following instance, we convert a MultiDict to a nested dictionary.

Python3

from multidict import MultiDict

  

knowledge = MultiDict([('key1', 'value1'), ('key2', 'value2'),

                  ('key1', 'value3')])

  

nested_dict = {}

  

for key, worth in knowledge.objects():

    

    if key in nested_dict:

        

        

        nested_dict[key].append(worth)

    else:

        

        

        nested_dict[key] = [value]

  

print(nested_dict)

Output:

On this instance, Create a MultiDict with keys ‘key1’ and ‘key2’ and a number of values. Iterate over the objects, add worth to the present key’s checklist or create a brand new entry with key and worth within the nested dictionary. Output is a nested dictionary with keys and lists of values related to every.

 

Instance 2:

Within the following instance, we convert a MultiDict to a nested dictionary.

Python3

from multidict import MultiDict

  

knowledge = MultiDict([('fruit', 'apple'), ('color', 'red'),

                  ('fruit', 'banana'), ('color', 'yellow')])

  

nested_dict = {}

  

for key, worth in knowledge.objects():

    

    if key in nested_dict:

        

        

        nested_dict[key].append(worth)

    else:

        

        

        nested_dict[key] = [value]

  

print(nested_dict)

Output:

On this instance, create a MultiDict with two keys ‘fruit’ and ‘colour’ with a number of values. Iterate over the objects, if the important thing exists, append its worth to the checklist, else create a brand new entry within the nested dictionary with the important thing and checklist of values. The ultimate output is a nested dictionary with keys and lists of values related to every key.

 

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