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📝 Python Recap Homework

Task 1: Lists

Goal: Practice creating, indexing, slicing, and looping over lists.

Instructions:

  1. Create a list of 5 products: "Keyboard", "Mouse", "Monitor", "Speaker", "Webcam".
  2. Print the first and last product.
  3. Add "Headphones" to the list.
  4. Remove "Speaker".
  5. Loop through the list and print each product in uppercase.
  6. Print the total number of products in the list.
  7. Slice the list to get the first 3 products and print them.
  8. Sort the list alphabetically and print it.

Task 2: Dictionaries

Goal: Practice creating and using dictionaries.

Instructions:

  1. Create a dictionary for a product:
product = {"name": "Keyboard", "units_sold": 5, "unit_price": 20.0}
  1. Print the product name and total revenue (units_sold * unit_price).
  2. Add a new key "region" with value "North".
  3. Update "units_sold" to 10.
  4. Loop through the dictionary and print each key and value.
  5. Create a list of 3 such product dictionaries with different values.
  6. Calculate and print the total revenue for all products in the list.

Task 3: Strings

Goal: Practice string manipulation.

Instructions:

  1. Take the string "Python Programming".
  2. Print it in lowercase and uppercase.
  3. Count how many times "o" appears.
  4. Replace "Python" with "Java".
  5. Split the string into a list of words.
  6. Join the list back into a single string with a hyphen (-) between words.

Task 4: Conditionals

Goal: Practice if/else statements.

Instructions:

  1. Ask the user for a number.
  2. Print "Even" if the number is even, "Odd" if it’s odd.
  3. Print "Large" if the number > 100, "Small" otherwise.

Task 5: Loops

Goal: Practice for and while loops.

Instructions:

  1. Create a list of numbers [2, 4, 6, 8, 10].
  2. Print each number multiplied by 2 using a for loop.
  3. Using a while loop, print numbers from 1 to 5.

Task 6: File Handling

Goal: Practice reading and writing files.

Instructions:

  1. Create a text file products.txt with the following content:
Keyboard
Mouse
Monitor
Speaker
Webcam

  1. Write a Python program to:

    • Read the file and print each line.
    • Count the number of products.
    • Add "Headphones" to the file.

Task 7: Final Integrative Task (Lists + Dicts + Strings + Loops + Conditionals + Files)

Goal: Apply all concepts in a small “Store Sales Analysis” project.

Instructions:

  1. Create a CSV file sales.csv:
date,product,region,units_sold,unit_price
2025-10-01,Keyboard,North,5,20.0
2025-10-01,Mouse,South,10,15.0
2025-10-02,Keyboard,South,3,21.0
2025-10-02,Monitor,North,2,150.0
2025-10-03,Mouse,North,8,14.5

  1. Read the CSV file and store data as list of dictionaries.

  2. Calculate and print:

    • Total units sold for each product.
    • Average unit price per region.
    • Most popular product (highest units sold).
    • Total revenue per region.

  3. Filter and print:

    • How many Keyboard units were sold in North.
    • How many Mouse units were sold in South.

Tip: Use loops, conditionals, string methods, type conversion, and dictionaries for aggregations.