python - “无”出现在输出中，我不知道为什么

Question

所以我正在尝试用python构建一个刽子手游戏。我已经完成了，但我无法弄清楚我的代码中是什么导致“无”出现。我读过它是由于打印“空”数据导致“无”出现。我试过单独删除“打印”部分，但有时程序无法运行（Jupyter Notebook），我不太明白。

我只想删除 None 输出（它只在我第一次输入后出现）。谢谢！

图像输出

def get_word():
    wordlist = open("wordlist.txt").readlines()
    word = random.choice(wordlist) # this makes 'word' get a random choice from wordlist.txt
    return word.upper() #this sets all the text uppercase

#the get_word function should select a random value from the wordlist.txt file and set it to UPPER CASE

def play(word):
    word_length = len(word)-1
    word_completion = "_" * word_length
    guessed = False 
    guessed_letters = []
    wrong_guesses = 0
    print("Let's play hangman!")
    print("The word is", word_length, "letters long. You have 6 guesses")
    print(word_completion)
    while not guessed and wrong_guesses <= 6: 
        guess = input("Please guess a latter or word: ").upper()
        if len(guess) == 1 and guess.isalpha():
            if guess in guessed_letters:
                print("You already guessed this letter!", guess)
            elif guess not in word:
                print(guess, "is not in the word.")
                wrong_guesses = wrong_guesses + 1
                guessed_letters.append(guess)
                print("Incorrect guesses =", wrong_guesses)
                print("Letters already guessed: ", guessed_letters)
                
            else:
                print("Good job,", guess, "is in the word")
                guessed_letters.append(guess)
                print("Incorrect guesses =", wrong_guesses)
                print("Letters already guessed: ", guessed_letters)
                
                word_as_list = list(word_completion)
                indices = [i for i, letter in enumerate(word) if letter == guess]
                for index in indices:
                    word_as_list[index] = guess
                word_completion = "".join(word_as_list)
                if  "_" not in word_completion:
                    guessed = True 
                    
        elif len(guess) == len(word) and guess.isalpha():
            if guess in guessed_letters:
                print("You already guessed the word", guess)
                print("Incorrect guesses =", wrong_guesses)
                print("Letters already guessed: ", guessed_letters)
                
            elif guess != word:
                print(guess, "is not in the word.")
                wrong_guesses = wrong_guesses + 1 
                guessed_letters.apppend(guess)
            else:
                guessed = True
                word_completion = word
            
        else: 
            print("Not a valid guess.")
        print(print_graphics(wrong_guesses))
        print(word_completion)
        
    if guessed:
        print("Congrats, you guessed correctly, victory!")
    else:
        print("Sorry you lost, the word was", word)
        
        
def print_graphics(wrong_guesses):
    # list of possible body parts
    body_parts = ['  O     |', '  |     |',' /|     |', ' /|\    |', ' /      |', ' / \    |']
    
    lines = 4 if wrong_guesses != 0 else 5
    # check number provided is usable
    if 0 <= wrong_guesses <= 6:
        print('  +-----+')  # print top of frame
        print('  |     |')
    
        # print the correct body parts for current state
        if wrong_guesses > 0:
            if wrong_guesses > 1:
                print(body_parts[0])
                lines -= 1
            if wrong_guesses > 4:
                print(body_parts[3])
                lines -= 1
            print(body_parts[wrong_guesses-1])

        for i in range(lines):
            print('        |')  # print the lines
        
        print('==========')  # print the floor        
            
def main():
    word = get_word()
    play(word)
    while input("Play again? - Y/N ").upper() == "Y":
        word = get_word()
        play(word)
        
if __name__ == "__main__":
     main()

标签： python

Answer 1

print(print_graphics(wrong_guesses))

您的print_graphics函数正在打印，但不返回任何值。默认返回值为None. 只需更改为：

print_graphics(wrong_guesses)