code: def _init_kws(self, **kws_usr):
          
          kws_self = {}
          user_keys = set(kws_usr)
          for objname, expset in self.exp_keys.items():
              usrkeys_curr = user_keys.intersection(expset)
              kws_self[objname] = get_kwargs(kws_usr, usrkeys_curr, usrkeys_curr)
          dpi = str(kws_self['dag'].get('dpi', self.dflts['dpi']))
          kws_self['dag']['dpi'] = dpi
          return kws_self
docs: Return a dict containing user-specified plotting options.