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Title: Python Dictionary: Adding Key-Value Pairs Using a For Loop - A Tutorial
Introduction:
Python dictionaries are versatile data structures that allow you to store and organize data using key-value pairs. Adding key-value pairs to a dictionary is a common operation in programming. In this tutorial, we'll explore how to use a for loop to dynamically add key-value pairs to a dictionary in Python, providing a practical and efficient way to populate dictionaries.
Example Scenario:
Let's consider a scenario where we want to create a dictionary to store information about students and their respective grades. We'll use a for loop to add student names as keys and their corresponding grades as values to the dictionary.
Explanation:
We start by initializing an empty dictionary named student_grades that will store the student names as keys and their corresponding grades as values.
We have two lists: students containing the names of the students and grades containing their respective grades.
The for loop iterates over the range of the length of the students list using range(len(students)). Inside the loop, we use the index i to access the elements of both lists.
Within the loop, the key-value pairs are added to the student_grades dictionary using the square bracket notation. The student name from the students list serves as the key, and the corresponding grade from the grades list serves as the value.
Finally, we print the resulting dictionary, displaying the student names and their associated grades.
Conclusion:
Using a for loop to add key-value pairs to a Python dictionary is a powerful technique for dynamically populating dictionaries based on existing data. This tutorial demonstrated how to achieve this by creating a simple example with student names and grades. Feel free to adapt and extend this approach for various scenarios in your own Python projects.
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