python stdout carriage return -

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I am running a loop on a given file..and writes it on that output for the purpose of monitoring The file on which the file is currently being processed. 

  sys.stdout.write ("\ rProcessing ...." + j) sys.stdout.flush ()   
 While the J file name is  
 the script's output ...  
  processing .... /etc/sysconfig/rhn/sources0.examplewn -slepcsbals-ipv6f   
 The problem is that the carriage return "\ r" does not already clarify the file name and Number previous file name.  
 Any ideas how I can fix it ... and do it more   
 
 < P> Remember the written string, and write the blank space.  
  Sys.stdout.write ('\ r' + (* '* * len (old_string)) sys.stdout.write (' \ rProcessing ... '+ new_string)

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