How to Filter a Dictionary Based on Values in Python

How to Filter a Dictionary Based on Values in Python ?

Answer

To filter a dictionary based on values in Python, you can use a dictionary comprehension. This allows you to create a new dictionary with the key-value pairs that satisfy a specific condition based on values.

✐ Examples

1 Filtering a Dictionary Based on Values Using Dictionary Comprehension

We can filter a dictionary based on values in Python using a dictionary comprehension. This example demonstrates how to declare and initialize a dictionary, use a dictionary comprehension to filter the dictionary based on values, and print the filtered dictionary.

For example,

We start by declaring and initializing a dictionary named my_dict with integer keys and string values.
We use a dictionary comprehension to filter the dictionary to include only values that contain the letter 'o'.
We print the filtered dictionary.

Python Program

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

# Filter the dictionary to include only values that contain the letter 'o'
filtered_dict = {k: v for k, v in my_dict.items() if 'o' in v}

# Print the filtered dictionary
print('Filtered dictionary:')
for key, value in filtered_dict.items():
    print(f'Key: {key}, Value: {value}')

Output

Filtered dictionary:
Key: 1, Value: One
Key: 2, Value: Two

2 Filtering a Dictionary to Include Only Specific Values

We can filter a dictionary to include only specific values in Python using a dictionary comprehension. This example demonstrates how to declare and initialize a dictionary, use a dictionary comprehension to filter the dictionary to include only the values 'One' and 'Three', and print the filtered dictionary.

For example,

We start by declaring and initializing a dictionary named my_dict with integer keys and string values.
We use a dictionary comprehension to filter the dictionary to include only the values 'One' and 'Three'.
We print the filtered dictionary.

Python Program

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

# Filter the dictionary to include only the values 'One' and 'Three'
filtered_dict = {k: v for k, v in my_dict.items() if v in ['One', 'Three']}

# Print the filtered dictionary
print('Filtered dictionary:')
for key, value in filtered_dict.items():
    print(f'Key: {key}, Value: {value}')

Output

Filtered dictionary:
Key: 1, Value: One
Key: 3, Value: Three

Summary

In this tutorial, we learned How to Filter a Dictionary Based on Values in Python language with well detailed examples.

◀ Previous Next ▶

Python Tutorials

Python Programs

Python How-Tos

How to Filter a Dictionary Based on Values in Python