如何在Python中从字符串中间获取特定短语

def find_phrase_in_middle(text, phrase):
    start_index = text.find(phrase)
    if start_index != -1:
        return text[start_index:start_index + len(phrase)]
    else:
        return "Phrase not found"

# 示例用法
text = "This is a sample text with a specific phrase in the middle."
phrase = "specific phrase"
result = find_phrase_in_middle(text, phrase)
print(result)  # 输出: specific phrase

import re

def find_phrase_in_middle_regex(text, phrase):
    pattern = re.compile(re.escape(phrase))
    match = pattern.search(text)
    if match:
        return match.group(0)
    else:
        return "Phrase not found"

# 示例用法
text = "This is a sample text with a specific phrase in the middle."
phrase = "specific phrase"
result = find_phrase_in_middle_regex(text, phrase)
print(result)  # 输出: specific phrase