In this article, we will study different approaches by which we can Extract the Subset Of Key-Value Pairs From the Python Dictionary. When we work with Python dictionaries, it often involves extracting subsets of key-value pairs based on specific criteria. This can be useful for tasks such as filtering, transforming, or manipulating data.

Extract Subset Of Key-Value Pairs From Dictionary in Python

Below are some of the ways by which we can extract a subset of key-value pairs from the dictionary in Python:

• Using Dictionary Comprehension
• Using filter() Function
• Using dict() Constructor and Items()
• Using Keys() Method with Dictionary Comprehension
• Using itemgetter() from the operator Module

Extract Subset Of Key-Value Pairs Using Dictionary Comprehension

In this approach, we use dictionary comprehension to create a new dictionary by iterating through the original dictionary. It includes only those key-value pairs where the key is in the specified set {‘a’, ‘b’}.

Subset dictionary using Dictionary Comprehension: {'a': 1, 'b': 2}

Extract Subset Of Key-Value Pairs Using filter() Function

In this approach, we use the filter() function to create an iterable of key-value pairs based on a condition. Here, it checks if the key is in the set {‘a’, ‘b’}. The result is then converted back to a dictionary.

Subset dictionary using filter() Function: {'a': 1, 'b': 2}

Extract Subset Of Key-Value Pairs Using dict() Constructor and Items()

In this approach, we create a dictionary by iterating through the specified keys and adding key-value pairs to the new dictionary.

Subset dictionary using dict() Constructor and Items(): {'b': 2, 'a': 1}

Extract Subset Of Key-Value Pairs Using Keys() Method

In this approach, we use the keys() method to get the keys from the original dictionary and after that we use the dictionary comprehension which creates a new dictionary with key-value pairs where the key is in the specified set {‘a’, ‘b’}.

Subset dictionary using Keys() Method with Dictionary Comprehension: {'a': 1, 'b': 2}

Extract Subset Of Key-Value Pairs Using itemgetter()

In this approach, we use the itemgetter() function from the operator module to extract values based on specified keys. Also zip() function combines keys and values, and in turn a new dictionary is created.

Subset dictionary using itemgetter() from the operator Module: {'a': 1, 'b': 2}

Conclusion

We have covered easy methods on “How To Extract Subset Of Key-Value Pairs From Python Dictionary”, we can easily extract a subset of key-value pairs from a dictionary using these methods. Accessing values in a dictionary is very important for data manipulation, updation, deletion, etc.