word_guessing_game.py

import random 
import re

def read_words():
  try:
    with open('words.txt', 'r') as file:
      words = file.read().splitlines()
      return words
  except FileNotFoundError:
    print('words.txt does not exist.')
    return []
  
def display_word(secret_word, guessed_letters):
  word_to_display = ''

  for letter in secret_word:
    if letter in guessed_letters:
      word_to_display += letter
    else:
      word_to_display += '_'

  print(word_to_display)


def get_guess(guessed_letters):
  while True:
    guess = input('Enter a letter: ').lower()
    if len(guess) != 1:
      print('Enter only one letter.')
    elif not re.search('[a-z]', guess):
      print('Enter only letters from a to z.')
    elif guess in guessed_letters:
      print('You already guessed that letter.')
    else:
      return guess


def is_word_guessed(secret_word, guessed_letters):
  for letter in secret_word:
    if letter not in guessed_letters:
      return False
  return True


def main():
  words = read_words()
  if not words:
    print('No words loaded.')
    return 
  secret_word = random.choice(words)
  print(secret_word)

  attempts = 6
  guessed_letters = []
  while attempts > 0:
    display_word(secret_word, guessed_letters)

    guess = get_guess(guessed_letters)
    guessed_letters.append(guess)

    if guess in secret_word:
      print('Good guess')
      if is_word_guessed(secret_word, guessed_letters):
        print('Congratulations! You guessed the word')
        break
    else:
      print('Wrong guess')
      attempts -= 1
      if attempts == 0:
        print(f'Game over! The word was {secret_word}')


if __name__ == '__main__':
  main()