Shopping List Duplication Issue in Python

What will you learn?

In this tutorial, you will master the art of creating a shopping list in Python using a list of dictionary items without encountering duplicate displays.

Introduction to the Problem and Solution

Imagine creating a shopping list in Python where each item is represented by a dictionary. However, when you print or display the list, you notice that items are duplicated. This duplication occurs due to how the items are internally represented.

To overcome this challenge, we need to ensure that each item is uniquely added to the shopping list. By correctly appending new dictionary items to the list, we can prevent duplicates from appearing during display.


Explore the following code snippet showcasing how to construct a shopping list in Python without facing duplication issues:

# Creating an empty shopping list
shopping_list = []

# Adding items to the shopping list as dictionaries
item1 = {"name": "apple", "quantity": 2}
item2 = {"name": "banana", "quantity": 3}


# Displaying the final shopping list

# Copyright PHD

# Credits:


In this code snippet: – Initialize an empty shopping_list. – Define individual items as dictionaries (e.g., item1, item2) with key-value pairs representing properties like name and quantity. – Append these item dictionaries one by one into our main shopping_list. – Print out the entire shopping list using print(shopping_list).

By adopting this method, each new dictionary item is added only once to the shopping list, ensuring a display free of duplicates.

    How do I add more items to my shopping list?

    To expand your shopping list, create additional dictionary items for new products and append them to your existing shopping_list.

    Can I remove an item from my shopping list?

    Yes, remove an item based on its index or specific attributes within your shopping list.

    Is it possible to update quantities of existing items in the shopping list?

    Absolutely! Modify any attribute of an existing dictionary within your shopping_list.

    How can I sort my shopping list alphabetically based on product names?

    Utilize sorting functions like .sort() or custom sorting functions with criteria based on keys such as ‘name’ from your dictionaries inside the lists.

    Can I have nested lists within my main ‘shopping_list’ for categorizing products further?

    Certainly! Incorporate nested lists or dictionaries inside your main ‘shopping_list’ for organizing products into categories or sections efficiently.


    Mastering data structuring techniques like lists of dictionaries empowers us with effective ways of managing intricate information sets such as a shopping cart. By grasping how data is stored and accessed within these structures, we enhance our programming skills and optimize data management strategies.

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