np.unique() for unique elements in NumPy - Mini Project: Build & Apply

Find Unique Elements Using np.unique()

📖 Scenario: You work in a store and have a list of product IDs sold today. Some products were sold multiple times.You want to find out which unique products were sold to understand your sales better.

🎯 Goal: Build a small program that uses np.unique() to find unique product IDs from a list.

📋 What You'll Learn

Create a numpy array called product_ids with the exact values: [101, 203, 101, 405, 203, 507]

Create a variable called unique_products to store unique product IDs using np.unique()

Print the unique_products array to see the unique product IDs

💡 Why This Matters

🌍 Real World

Finding unique items in sales data helps stores understand what products are popular and manage inventory better.

💼 Career

Data scientists often need to clean and analyze data by identifying unique values to prepare datasets for further analysis.

1

Create the product IDs array

Create a numpy array called product_ids with these exact values: [101, 203, 101, 405, 203, 507]

NumPy

import numpy as np

# Create the product_ids array with the given values
# Your code here

Need a hint?

Use np.array() to create the array with the exact list of numbers.

2

Use np.unique() to find unique product IDs

Create a variable called unique_products and assign it the result of np.unique(product_ids) to find unique product IDs.

NumPy

import numpy as np

product_ids = np.array([101, 203, 101, 405, 203, 507])

# Use np.unique() on product_ids and store in unique_products
# Your code here

Need a hint?

Call np.unique() with product_ids inside the parentheses.

3

Print the unique product IDs

Write a print statement to display the unique_products array.

NumPy

import numpy as np

product_ids = np.array([101, 203, 101, 405, 203, 507])

unique_products = np.unique(product_ids)

# Print the unique_products array
# Your code here

Need a hint?

Use print(unique_products) to show the unique product IDs.

4

Complete program to find and print unique product IDs

Combine all previous steps to create a complete program that imports numpy, creates the product_ids array, finds unique products with np.unique(), and prints the result.

NumPy

import numpy as np

product_ids = np.array([101, 203, 101, 405, 203, 507])

unique_products = np.unique(product_ids)

print(unique_products)

# Program complete

Need a hint?

Run the full program to see the unique product IDs printed.