3. Guess the number

The code to play the guess the number game is developed in stages below.

3.1. Random integer

The microbit needs to pick a random integer between 1 and 9 that will be guessed by the user.
The function, get_secret, returns a random integer from 1 to 9 inclusive.
from microbit import *
import random

def get_secret():
    return random.randint(1, 9)

Tasks

  1. Add parameters to the get_secret function, min_num and max_num to specify the lowest and highest possible returned integers.

  2. Modify the parameters to have a default of 1 for min_num of 9 for max_num.

Add parameters to the get_secret function, min_num and max_num to specify the lowest and highest possible returned integers.

from microbit import *
import random

def get_secret(min_num, max_num):
    return random.randint(min_num, max_num)

Modify the parameters to have a default of 1 for min_num of 9 for max_num.

from microbit import *
import random

def get_secret(min_num=1, max_num=9):
    return random.randint(min_num, max_num)

3.2. Select number

The user needs to use the buttons to select a guess number to make the guess with.
The function, select_number(start_num, min_num, max_num), was developed in the number_chooser page.

3.3. Check the guess

The guess number needs to be compared with the secret number.
The function, check_guess(secret_num, guess), returns True if the secret_num and the guess match. It returns False if they don’t match.
Visual feedback is added via images: YES for correct, arrows to hint at the guess direction.
When wrong, the guess number needs to be re-shown after the feedback, as a reminder of the last guess.
The code is scaffolded below, but needs completion.
def check_guess(secret_num, guess):
    if guess == secret_num:
        display.show.........
        sleep(400)
        return .........
    elif guess > secret_num:
        display.show(.........)
        sleep(400)
        display.show(guess)
        return .........
    else:
        display.show(.........)
        sleep(400)
        display.show(guess)
        return .........

Tasks

  1. Complete the code for the check_guess function.

def check_guess(secret_num, guess):
    if guess == secret_num:
        display.show(Image.YES)
        sleep(400)
        return True
    elif guess > secret_num:
        display.show(Image.ARROW_S)
        sleep(400)
        display.show(guess)
        return False
    else:
        display.show(Image.ARROW_N)
        sleep(400)
        display.show(guess)
        return False

3.4. Guess the number version 1

Build a guessing game in which the player has to guess a number between 1 and 9.
Scroll the text “1-9?” at the start then display “5” as the starting number for the user’s guess.
Use random.randint(min_num=1, max_num=9) for the secret number to be guessed.
Use select_number(start_num, min_num, max_num) to select the number for the guess.
Use the A-button to increase the guess number by 1.
Use the B-button to make a guess.
Give feedback with ARROW_N to go higher and ARROW_S to go lower
Show a tick when correct.
Use a while-loop that stops when the secret number has been guessed. Set the flag: guessed = False before the loop.

Tasks

  1. Build Guess the number version 1.

from microbit import *
import random


def get_secret(min_num=1, max_num=9):
    return random.randint(min_num, max_num)


def select_number(start_num, min_num=1, max_num=9):
    counter = start_num
    display.show(counter, delay=200)
    while button_b.was_pressed() is False:
        if button_a.is_pressed():
            counter += 1
            if counter > max_num:
                counter = min_num
            display.show(counter, delay=200)
        sleep(200)
    return counter


def check_guess(secret_num, guess):
    if guess == secret_num:
        display.show(Image.YES)
        sleep(400)
        return True
    elif guess > secret_num:
        display.show(Image.ARROW_S)
        sleep(400)
        display.show(guess)
        return False
    else:
        display.show(Image.ARROW_N)
        sleep(400)
        display.show(guess)
        return False

secret_num = get_secret()
guess = 5
guessed = False
display.scroll("1-9?")
while guessed is False:
    guess = select_number(guess, min_num=1, max_num=9)
    guessed = check_guess(secret_num, guess)

3.5. New versions:

Modify the while-loop so that a new game is automatically started.
Add counting of the number of guesses made and display it at the end of a game.
Add tracking of the total number of games played and the best score.

3.6. Guess the number version 2

Modify the while-loop so that a new game is automatically started.
Do this by moving the condition out of the while-loop and test it in an if statement.

Tasks

  1. Modify the while-loop so that a new game is automatically started. Just show the main code, excluding functions.

  2. Show the full code.

from microbit import *
import random


secret_num = get_secret()
guess = 5
guessed = False
display.scroll("1-9?")
while True:
    guess = select_number(guess, min_num=1, max_num=9)
    guessed = check_guess(secret_num, guess)
    if guessed:
        # new game
        secret_num = get_secret()
        guess = 5
        guessed = False

from microbit import *
import random


def get_secret(min_num=1, max_num=9):
    return random.randint(min_num, max_num)


def select_number(start_num, min_num=1, max_num=9):
    counter = start_num
    display.show(counter, delay=200)
    while button_b.was_pressed() is False:
        if button_a.is_pressed():
            counter += 1
            if counter > max_num:
                counter = min_num
            display.show(counter, delay=200)
        sleep(200)
    return counter


def check_guess(secret_num, guess):
    if guess == secret_num:
        display.show(Image.YES)
        sleep(400)
        return True
    elif guess > secret_num:
        display.show(Image.ARROW_S)
        sleep(400)
        display.show(guess)
        return False
    else:
        display.show(Image.ARROW_N)
        sleep(400)
        display.show(guess)
        return False


secret_num = get_secret()
guess = 5
guessed = False
display.scroll("1-9?")
while True:
    guess = select_number(guess, min_num=1, max_num=9)
    guessed = check_guess(secret_num, guess)
    if guessed:
        # new game
        secret_num = get_secret()
        guess = 5
        guessed = False

3.7. Guess the number version 3

Add counting of the number of guesses made and display it at the end of a game.
Add a variable game_guesses to keep track of the number of guesses made.

Tasks

  1. Add counting of the number of guesses made and display it at the end of each game. Just show the main code, excluding functions.

  2. Show the full code.

from microbit import *
import random


secret_num = get_secret()
guess = 5
game_guesses = 0
guessed = False
display.scroll("1-9?")
while True:
    guess = select_number(guess, min_num=1, max_num=9)
    game_guesses += 1
    guessed = check_guess(secret_num, guess)
    if guessed:
        display.scroll(str(game_guesses) + " GUESSES", delay=80)
        # new game
        secret_num = get_secret()
        guess = 5
        game_guesses = 0
        guessed = False

from microbit import *
import random


def get_secret(min_num=1, max_num=9):
    return random.randint(min_num, max_num)


def select_number(start_num, min_num=1, max_num=9):
    counter = start_num
    display.show(counter, delay=200)
    while button_b.was_pressed() is False:
        if button_a.is_pressed():
            counter += 1
            if counter > max_num:
                counter = min_num
            display.show(counter, delay=200)
        sleep(200)
    return counter


def check_guess(secret_num, guess):
    if guess == secret_num:
        display.show(Image.YES)
        sleep(400)
        return True
    elif guess > secret_num:
        display.show(Image.ARROW_S)
        sleep(400)
        display.show(guess)
        return False
    else:
        display.show(Image.ARROW_N)
        sleep(400)
        display.show(guess)
        return False


secret_num = get_secret()
guess = 5
game_guesses = 0
guessed = False
display.scroll("1-9?")
while True:
    guess = select_number(guess, min_num=1, max_num=9)
    game_guesses += 1
    guessed = check_guess(secret_num, guess)
    if guessed:
        display.scroll(str(game_guesses) + " GUESSES", delay=80)
        # new game
        secret_num = get_secret()
        guess = 5
        game_guesses = 0
        guessed = False

3.8. Guess the number version 4

Add tracking of the total number of games played and the best score.
Add the variables best_score and total_games.
Initially, there is no best score value.
Rather than setting at an arbitrarily high value such as 98765, it should be set to None.

Tasks

  1. Write a function, get_best_score, that gets the lower value from the current best_score and game_guesses from a finished game. Use an if statement to first check whether best_score is None.

from microbit import *
import random


def get_best_score(best_score, game_guesses):
    if best_score is None:
        return game_guesses
    else:
        return min(best_score, game_guesses)

Tasks

  1. Add tracking of the total number of games played and the best score. Just show the main code.

  2. Show the full code.

from microbit import *
import random


def get_best_score(best_score, game_guesses):
    if best_score is None:
        return game_guesses
    else:
        return min(best_score, game_guesses)


total_games = 1
best_score = None
secret_num = get_secret()
guess = 5
game_guesses = 0
guessed = False
display.scroll("1-9?")
while True:
    guess = select_number(guess, min_num=1, max_num=9)
    game_guesses += 1
    guessed = check_guess(secret_num, guess)
    if guessed:
        display.scroll(str(game_guesses) + " GUESSES", delay=80)
        best_score = get_best_score(best_score, game_guesses)
        display.scroll("BEST: " + str(best_score) + " GAMES: " + str(total_games), delay=80)
        # new game
        total_games += 1
        secret_num = get_secret()
        guess = 5
        game_guesses = 0
        guessed = False

from microbit import *
import random


def get_secret(min_num=1, max_num=9):
    return random.randint(min_num, max_num)


def select_number(start_num, min_num=1, max_num=9):
    counter = start_num
    display.show(counter, delay=200)
    while button_b.was_pressed() is False:
        if button_a.is_pressed():
            counter += 1
            if counter > max_num:
                counter = min_num
            display.show(counter, delay=200)
        sleep(200)
    return counter


def check_guess(secret_num, guess):
    if guess == secret_num:
        display.show(Image.YES)
        sleep(400)
        return True
    elif guess > secret_num:
        display.show(Image.ARROW_S)
        sleep(400)
        display.show(guess)
        return False
    else:
        display.show(Image.ARROW_N)
        sleep(400)
        display.show(guess)
        return False


def get_best_score(best_score, game_guesses):
    if best_score is None:
        return game_guesses
    else:
        return min(best_score, game_guesses)


total_games = 1
best_score = None
secret_num = get_secret()
guess = 5
game_guesses = 0
guessed = False
display.scroll("1-9?")
while True:
    guess = select_number(guess, min_num=1, max_num=9)
    game_guesses += 1
    guessed = check_guess(secret_num, guess)
    if guessed:
        display.scroll(str(game_guesses) + " GUESSES", delay=80)
        best_score = get_best_score(best_score, game_guesses)
        display.scroll("BEST: " + str(best_score) + " GAMES: " + str(total_games), delay=80)
        # new game
        total_games += 1
        secret_num = get_secret()
        guess = 5
        game_guesses = 0
        guessed = False

3.9. Guess the number extension ideas

Replace automatic new games with being asked to confirm a new game with a button press.
At the start of the game, ask for button presses to confirm the number range as 1-9 or 1 - 99.
For 1-99 games, use sideways tilting to change the guess, with greater tilting used to move in steps of 10.
Add more feedback at the end of games, including best and worst scores, total games and average. Consider asking the user to confirm this with a button press.