Python Lists - Exercises

:computer: What you'll learn

• How to create and manipulate Python lists
• Working with list indices and accessing elements
• Adding and removing items from lists
• Using range() to generate lists
• List slicing techniques

Estimated time: 30-40 minutes

Getting Started

1. Click the link here
2. Make a copy of the Colab Notebook into your Google Drive
3. Follow the exercises below in order

:bulb: Remember to run each code cell in order! Use Shift+Enter to run a cell and move to the next one.

:computer: Question One: Working with Number Lists

Time estimate: 10 minutes

Step One: Create a list of multiples of 10

1. Create a list containing multiples of ten from 10 to 100
2. Assign this list to a variable named num

python

num = [10,20,30,40,50,60,70,80,90,100]

3. Print the list to verify it's correct

Step 2: Find an element's index

1. Use the .index() method to find where 60 is located
2. Print the index value

Expected output:

5

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Step 3: Modify a list element

1. Change the number 60 to 65 using index assignment
2. Print the updated list

Expected output:

csharp

[10, 20, 30, 40, 50, 65, 70, 80, 90, 100]

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:computer: Question 2: Managing a Games List

Time estimate: 10 minutes

Step One: Create an empty list

1. Create an empty list
2. Assign it to a variable named games

python

games = []

Step 2: Add items to the list

1. Use the .append() method to add "Minecraft"
2. Add "Fortnite" using .append()
3. Add "Valorant" using .append()
4. Print the complete list

Expected output:

css

['Minecraft', 'Fortnite', 'Valorant']

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Step 3: Remove an item by index

1. Find the index of "Fortnite" in your list
2. Use del games[index] to remove it
3. Print the updated list tip Remember that list indices start at 0! The first item is at index 0, second at index 1, etc.

Expected output:

['Minecraft', 'Valorant']

Step 4: Check if an item exists

1. Use the in operator to check if "Fortnite" is still in the list
2. Print the result (should be False)

Expected output:

False

:computer: Advanced Level: List Generation and Slicing

Time estimate: 10-15 minutes

Step One: Generate a list using range()

1. Use range(1, 51) to create numbers from 1 to 50
2. Convert the range to a list using list()
3. Assign to a variable named numbers
4. Print the list

:bulb: The range() function doesn't include the ending value, so use 51 to get numbers up to 50!

Expected output:

csharp

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50]

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Step 2: Extract a portion using slicing

1. Use list slicing to get numbers from 21 to 30
2. Remember: the number 21 is at index 20 (since we start counting from 0)
3. Assign the slice to a variable named new_numbers
4. Print the new list

Expected output:

csharp

[21, 22, 23, 24, 25, 26, 27, 28, 29, 30]

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Step 3: Add elements at specific positions

1. Use .insert(0, 10) to add 10 at the beginning
2. Use .append(40) to add 40 at the end
3. Print the final list

Expected output:

csharp

[10, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 40]

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:memo: Submission

:warning: Important! Before submitting:

1. Review all your code and outputs
2. Make sure all expected outputs match your results
3. Save your Colab notebook

:link: Submit your exercise here

:wrench: Troubleshooting

Common issues:

• IndexError: Check that you're using the correct index values
• NameError: Make sure you've run all previous cells in order
• TypeError: Verify you're using the correct methods for lists tip Need help? If you're stuck:

1. Re-read the instructions carefully
2. Check Python documentation for list methods
3. Try printing intermediate values to debug