如何从包含不同类别的txt文件创建字典？

import os

# 定义字典
dictionary = {}

# 定义包含不同类别txt文件的文件夹路径
folder_path = 'path/to/txt/files'

# 遍历文件夹中的txt文件
for file_name in os.listdir(folder_path):
    file_path = os.path.join(folder_path, file_name)
    
    # 判断是否为txt文件
    if file_name.endswith('.txt'):
        # 获取类别标签
        category = file_name.split('.')[0]
        
        # 打开文件并逐行读取内容
        with open(file_path, 'r') as file:
            lines = file.readlines()
        
        # 处理文本并添加到字典中
        processed_text = []
        for line in lines:
            # 文本处理操作，如分词、去除标点符号、转换为小写等
            processed_line = line.strip().lower()
            processed_text.append(processed_line)
        
        # 将处理后的文本添加到字典中
        if category not in dictionary:
            dictionary[category] = processed_text
        else:
            dictionary[category].extend(processed_text)

# 打印字典内容
for category, text_list in dictionary.items():
    print(category)
    for text in text_list:
        print(text)