code: def _load_profile(self, profile_name):
          
  
          # find the profile
          default_profile = self._profile_list[0]
          for profile in self._profile_list:
              if profile.get('default', False):
                  # explicit default, not the first
                  default_profile = profile
  
              if profile['display_name'] == profile_name:
                  break
          else:
              if profile_name:
                  # name specified, but not found
                  raise ValueError("No such profile: %s. Options include: %s" % (
                      profile_name, ', '.join(p['display_name'] for p in self._profile_list)
                  ))
              else:
                  # no name specified, use the default
                  profile = default_profile
  
          self.log.debug("Applying KubeSpawner override for profile '%s'", profile['display_name'])
          kubespawner_override = profile.get('kubespawner_override', {})
          for k, v in kubespawner_override.items():
              if callable(v):
                  v = v(self)
                  self.log.debug(".. overriding KubeSpawner value %s=%s (callable result)", k, v)
              else:
                  self.log.debug(".. overriding KubeSpawner value %s=%s", k, v)
              setattr(self, k, v)
docs: Load a profile by name
  
          Called by load_user_options