用Python语言编写一个猜单词游戏，游戏规则是：从26个小字母字符中随机取5个字符组成一个字符串，然后猜测此串直到成功；接着进行下一次猜测。退出由玩家控制。结束给出玩家平均猜测一个串所用的次数。

好的，这是一个编程问题，我可以回答。以下是 Python 代码示例：

import random

def generate_word():
    letters = 'abcdefghijklmnopqrstuvwxyz'
    word = ''.join(random.choice(letters) for i in range(5))
    return word

def guess_word():
    word = generate_word()
    attempts = 0
    while True:
        attempts += 1
        guess = input('Guess the word: ')
        if guess == word:
            print('Correct!')
            break
        else:
            print('Incorrect.')
    return attempts

total_attempts = 0
num_games = 5
for i in range(num_games):
    total_attempts += guess_word()

avg_attempts = total_attempts / num_games
print(f'You took an average of {avg_attempts} guesses per game.')

希望这可以帮到你。