在Python中，使用文本文件创建以单词长度作为关键字、以实际单词本身作为值的字典时出现问题

file = open("words.txt", "r")

lines = file.readlines()

word_dict = {}

for line in lines:
    words = line.split()  # 将行按空格分割成单词列表
    for word in words:
        length = len(word)  # 获取单词长度
        if length not in word_dict:
            word_dict[length] = []  # 如果长度不在字典中，则创建一个空列表
        word_dict[length].append(word)  # 将单词添加到对应长度的列表中

for length, words in word_dict.items():
    print(f"单词长度为 {length} 的单词有：")
    for word in words:
        print(word)
    print()

file = open("words.txt", "r")
lines = file.readlines()
word_dict = {}

for line in lines:
    words = line.split()
    for word in words:
        length = len(word)
        if length not in word_dict:
            word_dict[length] = []
        word_dict[length].append(word)

for length, words in word_dict.items():
    print(f"单词长度为 {length} 的单词有：")
    for word in words:
        print(word)
    print()

file.close()