code: def set_verbosity(self, verbosity='vvv', handlers=None):
          
          self.verbosity = sanitize(verbosity)
          self.set_level(v2l[verbosity], handlers=handlers)
          self.set_formatter(v2f[verbosity], handlers=handlers)
docs: Set the verbosity level of a certain log handler or of all handlers.
  
          Parameters
          ----------
          verbosity : 'v' to 'vvvvv'
              the level of verbosity, more v's is more verbose
  
          handlers : string, or list of strings
              handler names can be found in ``peri.logger.types.keys()``
              Current set is::
  
                  ['console-bw', 'console-color', 'rotating-log']