code: def print_summary(self, stream=sys.stdout, indent="", recurse_level=2):
          
          if recurse_level < 0:
              return
          stream.write("%sLink: %s\n" % (indent, self.linkname))
          stream.write("%sN_jobs: %s\n" % (indent, len(self.get_jobs())))
          self.sub_files.print_chain_summary(stream, indent)
docs: Print a summary of the activity done by this `Link`.
  
          Parameters
          -----------
          stream : `file`
              Stream to print to, must have 'write' method.
  
          indent : str
              Indentation at start of line
  
          recurse_level : int
              Number of recursion levels to print