code: def scan_process_filenames(self):
          
          complete = True
          for aProcess in self.__processDict.values():
              try:
                  new_name = None
                  old_name = aProcess.fileName
                  try:
                      aProcess.fileName = None
                      new_name = aProcess.get_filename()
                  finally:
                      if not new_name:
                          aProcess.fileName = old_name
                          complete = False
              except Exception:
                  complete = False
          return complete
docs: Update the filename for each process in the snapshot when possible.
  
          @note: Tipically you don't need to call this method. It's called
              automatically by L{scan} to get the full pathname for each process
              when possible, since some scan methods only get filenames without
              the path component.
  
              If unsure, use L{scan} instead.
  
          @see: L{scan}, L{Process.get_filename}
  
          @rtype: bool
          @return: C{True} if all the pathnames were retrieved, C{False} if the
              debugger doesn't have permission to scan some processes. In either
              case, all processes the debugger has access to have a full pathname
              instead of just a filename.