如何使用文档短语拆分空格并提取特定单词

import re

def extract_specific_words(document, specific_word):
    # 去除标点符号和特殊字符
    document = re.sub(r'[^\w\s]', '', document)
    
    # 拆分文档为单词列表
    words = document.split()
    
    # 筛选特定单词
    specific_words = [word for word in words if word.lower() == specific_word.lower()]
    
    return specific_words

# 示例文档
document = "This is a sample document. It contains some specific words like apple, Apple, and APPle."

# 提取特定单词 "apple"
specific_word = "apple"

# 提取特定单词
result = extract_specific_words(document, specific_word)

print(result)