This is my solution to the *Guess The Number* problem presented here: https://knightlab.northwestern.edu/2014/06/05/five-mini-programming-projects-for-the-python-beginner/

guess_numbers.py

import random

LEVELS = {
    'easy': 10,
    'normal': 100,
    'hard': 1000,
    'insane': 10000
}


def print_title():
    print('=' * 20)
    print('Guess The Number In As Few Tries As Possible')
    print('=' * 20)


def select_random_number(level: str) -> int:
    return random.randint(1, LEVELS[level])


def select_a_level():

    print('Levels:')
    levels = list(LEVELS.keys())
    for i, l in enumerate(levels):
        print(f'\t{i}: {l.capitalize()}')

    level = input(f'\nSelect A Level: ')

    while not level.isdigit() or int(level) < 0 or int(level) >= len(levels):
        print('Unknown Level Selected.')
        level = input(f'Select A Level: ')

    return levels[int(level)]


def validate_guess(guess: str, level: str):

    if not guess.isdigit():
        return False, 'Your guess needs to be an integer'

    if 0 >= int(guess) or int(guess) > LEVELS[level]:
        return False, f'Your guess needs to be between 1 and {LEVELS[level]}'

    return True, ''


def enter_a_guess(level):

    guess = input('Enter Your Guess: ')
    is_valid, error = validate_guess(guess, level)
    while not is_valid:
        print(error)
        guess = input('Enter Your Guess: ')
        is_valid, error = validate_guess(guess, level)

    return int(guess)


if __name__ == '__main__':

    print_title()

    selected_level = select_a_level()
    print(f'You selected: {selected_level.capitalize()}.')

    selected_number = select_random_number(selected_level)
    print(f'I have selected a number between 1 and {LEVELS[selected_level]}.')
    print('Good Luck!')

    tries = 1
    input_guess = enter_a_guess(selected_level)

    while input_guess != selected_number:

        tries += 1

        if input_guess < selected_number:
            print('Too Low; Guess Higher')
            input_guess = enter_a_guess(selected_level)

        if input_guess > selected_number:
            print('Too High; Guess Lower')
            input_guess = enter_a_guess(selected_level)

    print(f'Correct;  My number was {selected_number}')
    print(f'It took you {tries} tries to guess my number')