Hangman game

game.py

import random
import string

word_list = ['python', 'java', 'kotlin', 'javascript']


class GameState:
    def __init__(self):
        self.turns = 8
        self.alive = True
        self.state_msg = ''
        self.word = random.choice(word_list)
        self.guessed_letters = set()
        self.tryed_letters = set()

    def render_word(self) -> str:
        letters_to_hide = set(self.word).difference(self.guessed_letters)
        return self.word.translate(str.maketrans(''.join(letters_to_hide), '-' * len(letters_to_hide)))

    def sanitize(self, input_string: str) -> None:
      if len(input_string) != 1:
        print('You should input a single letter')
      elif input_string not in string.ascii_lowercase:
        print('Please enter a lowercase English letter')
      elif input_string in self.tryed_letters:
        print("You've already guessed this letter")
      else:
        self.guess_letter(input_string)

    def guess_letter(self, letter: str) -> None:
      if letter not in self.word:
        self.update("That letter doesn't appear in the word")
      else:
        self.guessed_letters.add(letter)
        if not self.render_word().count('-'):
          self.state_msg = 'You guessed the word!\nYou survived!'
          self.alive = False
      self.tryed_letters.add(letter)

    def update(self, msg: str = '') -> None:
      self.turns -= 1
      self.alive = self.turns != 0
      if msg:
        print(msg)
      if not self.alive:
        self.state_msg = 'You lost!'

def game_loop() -> None:
  state = GameState()
  while state.alive:
      print()
      print(state.render_word())
      state.sanitize(input('Input a letter:'))
  print(state.state_msg)
  print()

def menu_loop() -> None:
  while True:
    user_input = input('Type "play" to play the game, "exit" to quit:')
    if user_input == 'play':
      game_loop()
    elif user_input == 'exit':
      break


print('H A N G M A N')
menu_loop()