Python Packages Exercises

What you'll learn

• How to import and use Python packages
• Working with the random package to generate random numbers
• Using the time package to create delays and timers
• Building interactive programs with loops and conditionals
• Creating a fun number guessing game

:information_source: :computer: Coding Activity | Estimated time: 45-60 minutes

Click the link here and make a copy of Colab Notebook into your Google Drive for coding.

Write the program using packages to show the outcome for each question.

Question One: Random Number Generator

⏱️ Time: 10 minutes

Using package random and loop, generate 5 random numbers from 1 to 20:

1. Import the random package at the beginning of your code
2. Create a for loop that runs exactly 5 times
3. Inside the loop, use random.randint(1, 20) to generate a random number
4. Print each random number

:bulb: :bulb: Remember: randint(a, b) includes both endpoints, so randint(1, 20) can return 1 or 20!

Expected output:

output

19
7
18
5
13

Question 2: Timer with Delays

⏱️ Time: 10 minutes

Using package time and loop, count from 1 to 10 every second.

1. Import the time package
2. Create a for loop using range(1, 11) to count from 1 to 10
3. Inside the loop:
   • Print the current number
   • Use time.sleep(1) to pause for 1 second

Expected output:

tip :bulb: Bonus Challenge: Try counting backwards! Use range(10, 0, -1) or the reversed() function to countdown from 10 to 1.

Question 3: Number Guessing Game

⏱️ Time: 20-25 minutes

Create an interactive guessing game using random, loops, and conditionals:

Step-by-Step Instructions:

1. Generate the secret number:

   • Import the random package
   • Use random.randint(1, 100) to generate a number
   • Store it in a variable called answer

2. Create the game loop:

   • Use a while True: loop to keep asking for guesses
   • Inside the loop, use input("Guess who am I: ") to get the user's guess
   • Convert the guess to an integer using int()

3. Check the guess:

   • If guess < answer: print "Your guess is too small"
   • If guess > answer: print "Your guess is too big"
   • If guess == answer: print "Awesome! Your guess is correct." and break the loop

:bulb: :bulb: Common mistake: Don't forget to convert the input to int()! Otherwise, you'll be comparing text to a number.

Game Flow Diagram:

python

   +--------------------------------+
   |  Random number from 1 to 100   |
   +--------------------------------+
                    |
                    ▼
   +---------------------------------+
-->|     Ask user to guess by        |<--

| |          using input            | |
|  +---------------------------------+   | |        /           |      \            | |       /            |       \           | |  "guess is         |    "guess is      | |   smaller"         |      bigger"      | |      | |       | |
|      ▼             |       ▼           | |   +-------------+  | +-------------+   | |   | Your guess  | | | Your guess  | |
| | is too small| | | is too big  | |
|   +-------------+  | +-------------+   | |        | |        | |
|    "Ask for        |     "Ask for      |
---- new guess"      |     new guess"-----
                     |
             "guess is correct"
                     |
                     ▼
      +----------------------------+

      |       Awesome! Your        | |     guess is correct.      |
      +----------------------------+

Bonus Challenges

⏱️ Time: 15-20 minutes (optional)

:star2: Challenge One: Dynamic Range Display

Improve your game by showing the valid range after each guess:

1. Keep track of the lowest and highest valid numbers
2. After each guess:
   • If guess is too small: update minimum and show "Range from [guess] to [maximum]"
   • If guess is too big: update maximum and show "Range from [minimum] to [guess]"

:star2: Challenge 2: Multiplayer Mode

Make it a competitive game:

1. Ask "How many players?" at the start
2. Create a list to track player names
3. Players take turns guessing
4. Display "Player [X]'s turn" before each guess
5. Announce which player won! tip :bulb: Use the modulo operator % to cycle through players!

---

Troubleshooting Guide

Common Issues and Solutions:

1. "NameError: name 'random' is not defined"

   • :white_check_mark: Solution: Add import random at the top of your code

2. "ValueError: invalid literal for int()"

   • :white_check_mark: Solution: Make sure the user enters only numbers, not letters

3. Game runs too fast/slow

   • :white_check_mark: Solution: Adjust the sleep() time in Question 2

4. Infinite loop in the guessing game

   • :white_check_mark: Solution: Make sure you have a break statement when the guess is correct

---

Submission

:warning: Warning :memo: Important: Before submitting, make sure:

• All three questions are completed
• Your code runs without errors
• You've tested the guessing game at least once
• Save your Colab notebook!

Make sure to review your answers before submitting. Your responses will help track your progress.

:link: Submit your exercise here