选择文件名的特定部分，将其移动到开头

import os

def move_specific_part_to_start(filename, specific_part):
    # 获取文件名
    base_name = os.path.basename(filename)
    
    # 提取特定部分
    start_index = base_name.find(specific_part)
    if start_index == -1:
        return filename  # 特定部分不存在，直接返回原文件名
    
    end_index = start_index + len(specific_part)
    specific_part = base_name[start_index:end_index]
    remaining_part = base_name[:start_index] + base_name[end_index:]
    
    # 移动特定部分到开头
    new_filename = specific_part + remaining_part
    
    return os.path.join(os.path.dirname(filename), new_filename)

# 示例用法
filename = "/path/to/file/example.txt"
specific_part = "example"

new_filename = move_specific_part_to_start(filename, specific_part)
print(new_filename)