LabEx
Log InJoin For Free

Merging Multiple Python Dictionaries

PythonPythonBeginner
Practice Now

This tutorial is from open-source community. Access the source code

Introduction

In Python, dictionaries are used to store key-value pairs. Sometimes, we may need to combine two or more dictionaries into a single dictionary. In this challenge, you will be asked to write a function that merges two or more dictionaries.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL python(("Python")) -.-> python/ControlFlowGroup(["Control Flow"]) python(("Python")) -.-> python/PythonStandardLibraryGroup(["Python Standard Library"]) python(("Python")) -.-> python/FunctionsGroup(["Functions"]) python(("Python")) -.-> python/BasicConceptsGroup(["Basic Concepts"]) python(("Python")) -.-> python/DataStructuresGroup(["Data Structures"]) python/BasicConceptsGroup -.-> python/variables_data_types("Variables and Data Types") python/BasicConceptsGroup -.-> python/comments("Comments") python/ControlFlowGroup -.-> python/for_loops("For Loops") python/DataStructuresGroup -.-> python/tuples("Tuples") python/DataStructuresGroup -.-> python/dictionaries("Dictionaries") python/FunctionsGroup -.-> python/function_definition("Function Definition") python/FunctionsGroup -.-> python/keyword_arguments("Keyword Arguments") python/FunctionsGroup -.-> python/build_in_functions("Build-in Functions") python/PythonStandardLibraryGroup -.-> python/data_collections("Data Collections") subgraph Lab Skills python/variables_data_types -.-> lab-13690{{"Merging Multiple Python Dictionaries"}} python/comments -.-> lab-13690{{"Merging Multiple Python Dictionaries"}} python/for_loops -.-> lab-13690{{"Merging Multiple Python Dictionaries"}} python/tuples -.-> lab-13690{{"Merging Multiple Python Dictionaries"}} python/dictionaries -.-> lab-13690{{"Merging Multiple Python Dictionaries"}} python/function_definition -.-> lab-13690{{"Merging Multiple Python Dictionaries"}} python/keyword_arguments -.-> lab-13690{{"Merging Multiple Python Dictionaries"}} python/build_in_functions -.-> lab-13690{{"Merging Multiple Python Dictionaries"}} python/data_collections -.-> lab-13690{{"Merging Multiple Python Dictionaries"}} end

Merge Dictionaries

Write a function merge_dictionaries(*dicts) that takes in two or more dictionaries as arguments and returns a new dictionary that contains all the key-value pairs from the input dictionaries.

Your function should create a new dictionary and loop over the input dictionaries, using dictionary.update() to add the key-value pairs from each one to the result.

def merge_dictionaries(*dicts):
  res = dict()
  for d in dicts:
    res.update(d)
  return res
ages_one = {
  'Peter': 10,
  'Isabel': 11,
}
ages_two = {
  'Anna': 9
}
merge_dictionaries(ages_one, ages_two)
## { 'Peter': 10, 'Isabel': 11, 'Anna': 9 }

Summary

In this challenge, you have learned how to merge two or more dictionaries in Python. By using the update() method, you can easily combine the key-value pairs from multiple dictionaries into a single dictionary.

Related Python Courses
Quick Start with Python

Quick Start with Python

LinuxPython
Beginner
The Advanced Python Mastery

The Advanced Python Mastery

LinuxPython
Advanced
Python Practice Challenges

Python Practice Challenges

Python
Beginner

We use cookies for a number of reasons, such as keeping the website reliable and secure, to improve your experience on our website and to see how you interact with it. By accepting, you agree to our use of such cookies. Privacy Policy