python modify files

   #!/usr/bin/env python 
   #coding=utf-8 
   
   import os 
   import sys 
   
   pubid0=0000000 
   pubid1=1111111 
   path=1111111 
 
 def get_filenames(fdir): 
 
     return os.listdir(fdir) 
 
 def rename_file(filename,pubid0,pubid1): 
 
     os.rename(filename,filename.replace(pubid0,pubid1)) 
 
 
 if __name__ == '__main__': 
 
    path = sys.argv[1] 
    pubid0 = sys.argv[2] 
    pubid1 = sys.argv[3] 
    print '\t path :',path,'\t pubid0:',pubid0,'\t pubid1:',pubid1 
    print '\t\t***************************************\n' 
 
    filesname = get_filenames(path) 
    for i in filesname: 
 #       print i ,os.path.join(path,i) 
        nPos =str(i).find(pubid0) 
        if nPos > 0: 
           rename_file(os.path.join(path,i),pubid0,pubid1) 
           print os.path.join(path,i)