1 import os
 2 def check_file(start_dir, target): 
 3     os.chdir(start_dir)
 4     for each_file in os.listdir(os.curdir):
 5         if each_file == target:
 6             print(os.path.join(os.getcwd(), each_file))    
 7         if os.path.isdir(each_file):                    
 8             check_file(each_file,target)
 9             os.chdir(os.pardir)
10 
11 
12 start_dir = input(‘请输入待查找的初始目录：‘)
13 target = input(‘请输入要查找的目标文件：‘)
14 check_file(start_dir, target)