code: def print_big_file(self, top_n=5):
          
          self.assert_is_dir_and_exists()
  
          size_table = sorted(
              [(p, p.size) for p in self.select_file(recursive=True)],
              key=lambda x: x[1],
              reverse=True,
          )
          for p, size in size_table[:top_n]:
              print("{:<9}    {:<9}".format(repr_data_size(size), p.abspath))
docs: Print ``top_n`` big file in this dir.