A simple program for a guessing game I wrote with my children to begin teaching them to write code. See my blog post about the experience at http://failedtofunction.com/coding-with-children/

guessing_game.py

from random import randint
import re

def ask_for_a_number_with(question):
	number = input(question)
	while (re.match(r'^[0-9]+$', number) == None):
		print('That is not a valid number. Try again.')
		number = input(question)
	return int(number)

def get_yes_or_no(prompt):
	response = input(prompt)
	while (re.match(r'^[ynYN]$', response) == None):
		print('Enter "y" to play again or "n" to quit.')
		response = input(prompt)
	return response

def guess_is_not_correct(answer, guess):
	return answer != guess

def guess_is_too_high(answer, guess):
	return guess > answer

def ask_to_play_again():
	response = get_yes_or_no('Do you want to play again (y/n): ')
	return 'y' == response or 'Y' == response

def play_game(answer):
	guess = ask_for_a_number_with('Enter your first guess: ')
	guesses = 1
	while ( guess_is_not_correct(answer, guess) ): 
		if guess_is_too_high(answer, guess):
			print('Wrong! Guess lower.')
		else:
			print('Wrong! Guess higher.')
		guess = ask_for_a_number_with('Have another go: ')
		guesses = guesses + 1
	print('You got it!', guesses, 'guesses')

playagain = True
while (playagain):
	game_range = ask_for_a_number_with('Enter the highest number to choose from: ')
	answer = randint(1, game_range)
	play_game(answer)
	playagain = ask_to_play_again()
print('Goodbye')