从段落中的字符范围中提取句子的单词范围

import nltk

def extract_words_from_range(paragraph, char_range, word_range):
    # 提取字符范围内的子串
    substring = paragraph[char_range[0]:char_range[1]]
    
    # 句子分割
    sentences = nltk.sent_tokenize(substring)
    
    result = []
    
    for sentence in sentences:
        # 单词提取
        words = nltk.word_tokenize(sentence)
        
        # 单词范围提取
        word_substring = ' '.join(words[word_range[0]:word_range[1]])
        
        result.append(word_substring)
    
    return result

# 示例用法
paragraph = "This is a sample paragraph. It contains multiple sentences. Each sentence has several words."
char_range = (10, 50)
word_range = (2, 5)

words = extract_words_from_range(paragraph, char_range, word_range)
print(words)