Python搜索目录下指定的文件,并返回绝对路径(包括子目录)

 #!/usr/bin/python
 #coding=UTF-8
 #FileName:search.py
 #文件搜索
 import os;
 import sys;
 returnList = [];
 def search_file_in_dir(fileName, dirName):
     global returnList;
     #print dirName;
     if not os.path.isdir(dirName):
         sys.exit('directory does not exist.(%s)'%(dirName));
     fileList = [x for x in os.listdir(dirName) if os.path.isfile(os.path.join(dirName,x))];
     #print fileList;
     dirList = [i for i in os.listdir(dirName) if os.path.isdir(os.path.join(dirName,i))];
     #print dirList;
     if fileName in fileList:
         returnList.append(os.path.join(dirName, fileName));

     dirListLen = len(dirList);
     if dirListLen > 0:
         for d in dirList:
             search_file_in_dir(fileName, os.path.join(dirName, d));
     return returnList;

 print search_file_in_dir(sys.argv[1], sys.argv[2]);