How to Add Values to Dictionary of List in Python

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by Abdul Rawoof A R dot icon Updated: Feb 1, 2023

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A built-in data structure in Python called a dictionary holds things in a key-value manner. It resembles a list or an array, but instead of utilizing an index number to retrieve the objects, it uses a key. 

A list is a pre-built data structure in Python that is used to hold an ordered collection of things. These items, such as numbers, strings, or other objects, can be of any type. You can add a value to a dictionary from a list in Python by using the following methods:” 

  • Using a for loop: Iterate through the list and add each item to the dictionary using the dictionary's “update()” method. 
  • update(): In Python, the update() method is a built-in method of the dictionary data structure that allows you to add, update, or remove items from a dictionary. 
  • Using the dict() constructor: Pass the list of items as a key-value pair to the “dict()” constructor. 
  • dict(): Python’s dict() constructor is used to create a new dictionary. 
  • Using a list comprehension: Create a new list of key-value pairs, then pass it to the dict() constructor. 

Please review the code below to learn how to add values to a dictionary in Python from a list. 

Fig : Preview of the output that you will get on running this code from your IDE.



Follow the steps carefully to get the output easily.

  1. Install python on your IDE(Any of your favorite IDE).
  2. Copy the snippet using the 'copy' and paste it in your IDE.
  3. Run the file to generate the output.

I hope you found this useful.

I found this code snippet by searching for 'how to add a value into dictionary from a list in Python' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created in PyCharm 2021.3.
  2. The solution is tested on Python 3.9.7.

Using this solution, we are able to add a value to a dictionary from a list in python with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to add a value to a dictionary from a list in python.


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