text: import _plotly_utils.basevalidators
  
  
  class HistnormValidator(_plotly_utils.basevalidators.EnumeratedValidator):
      def __init__(self, plotly_name="histnorm", parent_name="histogram", **kwargs):
          super(HistnormValidator, self).__init__(
              plotly_name=plotly_name,
              parent_name=parent_name,
              edit_type=kwargs.pop("edit_type", "calc"),
              values=kwargs.pop(
                  "values",
                  ["", "percent", "probability", "density", "probability density"],
              ),
              **kwargs,
          )
  