How To Add Key To Dictionary Python

To manipulate data in Python, dictionaries are often used. As a collection of key-value pairs, dictionaries help in managing and organizing data. In this tutorial, we will learn how to add a key to a dictionary in Python.

Steps:

1. Create a dictionary.

To add a key to a dictionary in Python, we need to first create a dictionary using the curly braces {} or the dict() built-in method.
For example:

2. Add a key-value pair.

To add a key to the dictionary, we need to assign a value to that particular key.

In this example, we have created a new key called 'key' and assigned a value 'value' to it.

3. Verify the key is added.

It is always a good practice to verify whether the key has been added correctly or not.
For example:

This will print the dictionary with the new key-value pair.

4. Add multiple keys at once.

We can add multiple keys to a dictionary by using the update() method. This method takes a dictionary as an argument that contains the keys and their corresponding values that we want to add.

For example:

This will add two new keys 'key1' and 'key2' with their corresponding values 'value1' and 'value2' to the dictionary.

Conclusion:

In this tutorial, we learned how to add keys to a dictionary in Python. We saw that we can create a dictionary using the curly braces or the dict() built-in method, and then add keys to it by assigning values to them. We also learned that we can add multiple keys at once using the update() method.

Full Code:

Output:

{'key': 'value', 'key1': 'value1', 'key2': 'value2'}