Python猜字游戏

目前，我和我的队友正在做一个小练习，叫猜字游戏。但是，当我们运行这个函数时。它没有显示符合教师期望的正确输出。我们也被def检查函卡住了。所以，如果我做错了什么，你们能帮我检查一下吗：

import random




def read_word_list(word_list):
   str_list = []
     for line in word_list:
        for s in line.split():
           try:
              x= str(s)
              str_list.append(x)
           except ValueError:
              pass
        return str_list

words = ["introduction", "programming", "database", "concepts", "techniques", "security"]
my_list = read_word_list(words)
random_word = random.choice(my_list)
blanks = '_ ' * len(random_word)
print()
print ("Word: ",blanks)

def greetings():
    name = input("What is your name? ")
    print("Welcome,", name + "!")
    return name


def read_char(prompt, first, last):
    x= input(prompt)
    while x < first or x > last:
         print("Not in range. Try Again!!!")
         x= input(prompt)
    return x



def check_letters(target, letters):

    print(len(random_word))
    count = 0
    for c in random_word:
       if "a" <= c <= "z":
            count += 1
    print(count)

    count2 = 0
    for i in range(len(random_word)):
        if "a" <= random_word[i] <= "z":
            count2 += 1
    print(count2)

    new_s = " "
    for c in random_word:
        if "a" <= c <= "z" or "A" <= c <= "Z":
            new_s += c
        else:
            new_s += "_"
    print(new_s)

实际产量：

Word:  _ _ _ _ _ _ _ _ _ _ _ _ 
Guess a word game.
What is your name? David
Welcome, David!

Please make a guess: a
guess is wrong! 9 more failed attempts allowed.
guess is wrong! 8 more failed attempts allowed.
guess is wrong! 7 more failed attempts allowed.
guess is wrong! 6 more failed attempts allowed.
guess is wrong! 5 more failed attempts allowed.
guess is wrong! 4 more failed attempts allowed.
guess is wrong! 3 more failed attempts allowed.
guess is wrong! 2 more failed attempts allowed.
guess is wrong! 1 more failed attempts allowed.
guess is wrong! 0 more failed attempts allowed.
guess is wrong! -1 more failed attempts allowed.
guess is wrong! -2 more failed attempts allowed.

Traceback (most recent call last):
  File "C:/Users/USER/PycharmProjects/Exercise 4/testing.py", line 106, in <module>
    print("Words: ", newBlanks)
NameError: name 'newBlanks' is not defined

Word:\uuuuuuuuuuuuuuuuuuuuuuuuuu
猜猜单词游戏。
你的名字叫什么？大卫
欢迎你，大卫！
请猜一猜：a
猜错了！允许再进行9次失败的尝试。
猜错了！允许8次以上失败的尝试。
猜错了！允许再进行7次失败的尝试。
猜错了！允许再尝试6次失败。
猜错了！允许再进行5次失败的尝试。
猜错了！允许再进行4次失败的尝试。
猜错了！允许再进行3次失败的尝试。
猜错了！允许再进行2次失败的尝试。
猜错了！允许1次以上失败的尝试。
猜错了！允许再进行0次失败的尝试。
猜错了-允许1次以上失败的尝试。
猜错了-允许再进行2次失败的尝试。
回溯（最近一次呼叫最后一次）：
文件“C:/Users/USER/PycharmProjects/Exercise 4/testing.py”，第106行，在
打印（“文字：”，新行）
NameError:未定义名称“newBlanks”

您的程序中有很多错误。把它们都列在这里是不切实际的。我建议和你的老师谈谈，了解你到底做错了什么，以及如何满足他的期望。另外，你和你的朋友应该看看，以便更好地了解如何编写惯用Python代码。。。我们再也没有时间见面并征求老师的意见了。此外，我们遵循了他指导我们的相同结构。然而，关键的一点是，如果在def检查函中，我们仍然不知道如何执行它

Word:  _ _ _ _ _ _ _ _ _ _ _ _ 
Guess a word game.
What is your name? David
Welcome, David!

Please make a guess: a
guess is wrong! 9 more failed attempts allowed.
guess is wrong! 8 more failed attempts allowed.
guess is wrong! 7 more failed attempts allowed.
guess is wrong! 6 more failed attempts allowed.
guess is wrong! 5 more failed attempts allowed.
guess is wrong! 4 more failed attempts allowed.
guess is wrong! 3 more failed attempts allowed.
guess is wrong! 2 more failed attempts allowed.
guess is wrong! 1 more failed attempts allowed.
guess is wrong! 0 more failed attempts allowed.
guess is wrong! -1 more failed attempts allowed.
guess is wrong! -2 more failed attempts allowed.

Traceback (most recent call last):
  File "C:/Users/USER/PycharmProjects/Exercise 4/testing.py", line 106, in <module>
    print("Words: ", newBlanks)
NameError: name 'newBlanks' is not defined