在两个单词之间获取字符串的有效方法

def get_string_between_words(sentence, word1, word2):
    start_index = sentence.index(word1) + len(word1)
    end_index = sentence.index(word2)
    return sentence[start_index:end_index].strip()

sentence = "This is a sample sentence to demonstrate the method."
word1 = "sample"
word2 = "method"
result = get_string_between_words(sentence, word1, word2)
print(result)  # 输出： " sentence to demonstrate the "

import re

def get_string_between_words(sentence, word1, word2):
    pattern = re.compile(rf"{word1}\s+(.*?)\s+{word2}")
    match = re.search(pattern, sentence)
    if match:
        return match.group(1)
    else:
        return ""

sentence = "This is a sample sentence to demonstrate the method."
word1 = "sample"
word2 = "method"
result = get_string_between_words(sentence, word1, word2)
print(result)  # 输出： "sentence to demonstrate the"