在文本文件的特定部分查找所有年份

import re

def find_all_years(file_path, start_marker, end_marker):
    years = []
    
    with open(file_path, 'r') as file:
        text = file.read()
        
        # 定位到特定部分
        start_index = text.find(start_marker)
        end_index = text.find(end_marker, start_index)
        target_text = text[start_index:end_index]
        
        # 查找所有年份
        year_regex = r'\b\d{4}\b'  # 使用正则表达式匹配四位数字
        matches = re.findall(year_regex, target_text)
        
        # 存储年份结果
        years.extend(matches)
    
    return years

# 示例使用方法
file_path = 'path/to/text_file.txt'
start_marker = '===特定部分开始==='
end_marker = '===特定部分结束==='
years = find_all_years(file_path, start_marker, end_marker)
print(years)