How to append value in dictionary Python?

Appending a value to a dictionary in Python can be done by accessing the key and assigning the value to it. Let’s explore the process step by step.

1. Create an empty dictionary

To append a value to a dictionary, we first need to create an empty dictionary. This can be done by using curly braces {} or by using the dict() built-in function.

“`python
my_dict = {}
“`

or

“`python
my_dict = dict()
“`

2. Assign the value to the key

Once we have our dictionary, we can assign a value to a specific key. If the key does not exist, it will be created automatically. If the key already exists, the value associated with that key will be overwritten.

“`python
my_dict[key] = value
“`

In this case, `key` is the key in the dictionary to which we want to add the value, and `value` is the value we want to append.

3. Example: Appending values to a dictionary

Let’s consider a simple example where we want to append values to a dictionary that represents a student’s grades.

“`python
# Create an empty dictionary
grades = {}

# Append values to the dictionary
grades[“math”] = 95
grades[“science”] = 88
grades[“history”] = 92
“`

In this example, we create an empty dictionary called `grades`. Then, we use the key-value assignment to append the student’s grades to the dictionary. The resulting dictionary will look like this:

“`
{
“math”: 95,
“science”: 88,
“history”: 92
}
“`

4. FAQs