How to Get the Size (Number of Key-Value Pairs) of a Dictionary in Python

How to Get the Size (Number of Key-Value Pairs) of a Dictionary in Python ?

Answer

To get the size (number of key-value pairs) of a dictionary in Python, you can use the `len()` function. This function returns the number of key-value pairs in the dictionary.

✐ Examples

1 Getting the Size of a Dictionary Using the `len()` Function

We can get the size of a dictionary in Python using the `len()` function. This example demonstrates how to declare and initialize a dictionary, use the `len()` function to get the number of key-value pairs, and print the size.

For example,

We start by declaring and initializing a dictionary named my_dict with integer keys and string values.
We use the `len()` function to get the number of key-value pairs in the dictionary.
We print the size of the dictionary.

Python Program

my_dict = {
    1: 'One',
    2: 'Two',
    3: 'Three'
}

# Get the size of the dictionary using the len() function
size = len(my_dict)

# Print the size of the dictionary
print(f'The size of the dictionary is {size}.')

Output

The size of the dictionary is 3.

2 Getting the Size of an Empty Dictionary

We can get the size of an empty dictionary in Python using the `len()` function. This example demonstrates how to declare and initialize an empty dictionary, use the `len()` function to get the number of key-value pairs, and print the size.

For example,

We start by declaring and initializing an empty dictionary named my_dict.
We use the `len()` function to get the number of key-value pairs in the dictionary.
We print the size of the dictionary.

Python Program

my_dict = {}

# Get the size of the dictionary using the len() function
size = len(my_dict)

# Print the size of the dictionary
print(f'The size of the dictionary is {size}.')

Output

The size of the dictionary is 0.

Summary

In this tutorial, we learned How to Get the Size (Number of Key-Value Pairs) of a Dictionary in Python language with well detailed examples.

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How to Get the Size (Number of Key-Value Pairs) of a Dictionary in Python