Python Tutorial | Unlocking the Power of Python Dictionaries: A Comprehensive Tutorial with Coding Examples
In Python, a dictionary is a powerful data structure that allows us to store data in key-value pairs. It provides a flexible and efficient way to organize and manipulate data. In this blog post, we will explore how to perform various operations on dictionaries, such as creating a dictionary, printing dictionary items, adding or removing key-value pairs, checking for the existence of a key, iterating through a dictionary, and concatenating multiple dictionaries.
Table of Contents
- What is a Dictionary?
- Creating a Dictionary
- Printing Dictionary Items
- Adding and Removing Key-Value Pairs
- Checking for Key Existence
- Iterating Through a Dictionary
- Concatenating Multiple Dictionaries
| Practice Python MCQ with “Python MCQ Programs Interview “ Android App.
What is a Dictionary?
A dictionary in Python is a collection that allows us to store data in key-value pairs.
It is similar to a real-world dictionary, where words (keys) are associated with their meanings (values).
The key-value pairs are enclosed in curly brackets {} and separated by commas. Dictionaries are unordered, meaning that the items are not stored in a specific order.
Creating a Dictionary
To create a dictionary in Python, we can use curly brackets {} and separate the key-value pairs with commas.
Here’s an example:
country_capitals = {
“United States”: “Washington D.C.”,
“Italy”: “Rome”,
“England”: “London”
}
In this example, we have created a dictionary called country_capitals with three key-value pairs representing the countries and their respective capitals.
| Practical List — Python [ 4330701 ] [ PRACTICAL EXERCISES ]
Explore More:
