code: def get_formatter(name, silent=False):
      
      formatter = FormatterRegister.formatters.get(name)
      if formatter or silent:
          return formatter
      else:
          raise Exception("cannot find formatter '{}'".format(name))
docs: Returns the formatter class whose name attribute is *name*. When no class could be found and
      *silent* is *True*, *None* is returned. Otherwise, an exception is raised.