在以下函数中，我遇到了一些正则表达式问题并进行了修复：

• (Soruce: ....) / [Source: ....] 会导致 ( / [ 被截断
• 支持多个提及 (Soruce: ....) / [Source: ....]
• 有时答案的主要内容会在 abv. 模式的第一个示例之后被截断
• 在 Resources: 处进行截断

def split_sources_with_new_format(self, answer):
    # for pattern like (Soruce: ....) or [Source: ....]
    # This also takes care of premature truncate when the pattern repeats and placed in between the answer
    source_pattern = r'[\[\(]Source:[^\]\)]+[\]\)]'
    gem_sources = re.findall(source_pattern, answer)
    if gem_sources:
        answer = re.sub(source_pattern, '', answer)
        return answer, gem_sources

    # adding \b to not take words like resources
    if re.search(r"\bSOURCES?:", answer, re.IGNORECASE):
        answer, sources = re.split(
            r"\bSOURCES?:\s*|QUESTION:\s", answer, flags=re.IGNORECASE
        )[:2]
        sources = re.split(r"\n", sources)
    else:
        sources = ""
    return answer, sources
    
# save the original 
og_split_sources = RetrievalQAWithSourcesChain._split_sources

#patch
RetrievalQAWithSourcesChain._split_sources = split_sources_with_new_format

# get your desired result
chain = RetrievalQAWithSourcesChain(....)
result = chain.invoke(...)

# revert the patch
RetrievalQAWithSourcesChain._split_sources = og_split_sources