text: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
  
  
  class Contours(BaseTraceHierarchyType):
  
      # x
      # -
      @property
      def x(self):
          """
          The 'x' property is an instance of X
          that may be specified as:
            - An instance of plotly.graph_objs.surface.contours.X
            - A dict of string/value properties that will be passed
              to the X constructor
      
              Supported dict properties:
                  
                  color
                      Sets the color of the contour lines.
                  highlight
                      Determines whether or not contour lines about
                      the x dimension are highlighted on hover.
                  highlightcolor
                      Sets the color of the highlighted contour
                      lines.
                  highlightwidth
                      Sets the width of the highlighted contour
                      lines.
                  project
                      plotly.graph_objs.surface.contours.x.Project
                      instance or dict with compatible properties
                  show
                      Determines whether or not contour lines about
                      the x dimension are drawn.
                  usecolormap
                      An alternate to *color*. Determines whether or
                      not the contour lines are colored using the
                      trace *colorscale*.
                  width
                      Sets the width of the contour lines.
  
          Returns
          -------
          plotly.graph_objs.surface.contours.X
          """
          return self['x']
  
      @x.setter
      def x(self, val):
          self['x'] = val
  
      # y
      # -
      @property
      def y(self):
          """
          The 'y' property is an instance of Y
          that may be specified as:
            - An instance of plotly.graph_objs.surface.contours.Y
            - A dict of string/value properties that will be passed
              to the Y constructor
      
              Supported dict properties:
                  
                  color
                      Sets the color of the contour lines.
                  highlight
                      Determines whether or not contour lines about
                      the y dimension are highlighted on hover.
                  highlightcolor
                      Sets the color of the highlighted contour
                      lines.
                  highlightwidth
                      Sets the width of the highlighted contour
                      lines.
                  project
                      plotly.graph_objs.surface.contours.y.Project
                      instance or dict with compatible properties
                  show
                      Determines whether or not contour lines about
                      the y dimension are drawn.
                  usecolormap
                      An alternate to *color*. Determines whether or
                      not the contour lines are colored using the
                      trace *colorscale*.
                  width
                      Sets the width of the contour lines.
  
          Returns
          -------
          plotly.graph_objs.surface.contours.Y
          """
          return self['y']
  
      @y.setter
      def y(self, val):
          self['y'] = val
  
      # z
      # -
      @property
      def z(self):
          """
          The 'z' property is an instance of Z
          that may be specified as:
            - An instance of plotly.graph_objs.surface.contours.Z
            - A dict of string/value properties that will be passed
              to the Z constructor
      
              Supported dict properties:
                  
                  color
                      Sets the color of the contour lines.
                  highlight
                      Determines whether or not contour lines about
                      the z dimension are highlighted on hover.
                  highlightcolor
                      Sets the color of the highlighted contour
                      lines.
                  highlightwidth
                      Sets the width of the highlighted contour
                      lines.
                  project
                      plotly.graph_objs.surface.contours.z.Project
                      instance or dict with compatible properties
                  show
                      Determines whether or not contour lines about
                      the z dimension are drawn.
                  usecolormap
                      An alternate to *color*. Determines whether or
                      not the contour lines are colored using the
                      trace *colorscale*.
                  width
                      Sets the width of the contour lines.
  
          Returns
          -------
          plotly.graph_objs.surface.contours.Z
          """
          return self['z']
  
      @z.setter
      def z(self, val):
          self['z'] = val
  
      # property parent name
      # --------------------
      @property
      def _parent_path_str(self):
          return 'surface'
  
      # Self properties description
      # ---------------------------
      @property
      def _prop_descriptions(self):
          return """\
          x
              plotly.graph_objs.surface.contours.X instance or dict
              with compatible properties
          y
              plotly.graph_objs.surface.contours.Y instance or dict
              with compatible properties
          z
              plotly.graph_objs.surface.contours.Z instance or dict
              with compatible properties
          """
  
      def __init__(self, arg=None, x=None, y=None, z=None, **kwargs):
          """
          Construct a new Contours object
          
          Parameters
          ----------
          arg
              dict of properties compatible with this constructor or
              an instance of plotly.graph_objs.surface.Contours
          x
              plotly.graph_objs.surface.contours.X instance or dict
              with compatible properties
          y
              plotly.graph_objs.surface.contours.Y instance or dict
              with compatible properties
          z
              plotly.graph_objs.surface.contours.Z instance or dict
              with compatible properties
  
          Returns
          -------
          Contours
          """
          super(Contours, self).__init__('contours')
  
          # Validate arg
          # ------------
          if arg is None:
              arg = {}
          elif isinstance(arg, self.__class__):
              arg = arg.to_plotly_json()
          elif isinstance(arg, dict):
              arg = copy.copy(arg)
          else:
              raise ValueError(
                  """\
  The first argument to the plotly.graph_objs.surface.Contours 
  constructor must be a dict or 
  an instance of plotly.graph_objs.surface.Contours"""
              )
  
          # Import validators
          # -----------------
          from plotly.validators.surface import (contours as v_contours)
  
          # Initialize validators
          # ---------------------
          self._validators['x'] = v_contours.XValidator()
          self._validators['y'] = v_contours.YValidator()
          self._validators['z'] = v_contours.ZValidator()
  
          # Populate data dict with properties
          # ----------------------------------
          _v = arg.pop('x', None)
          self.x = x if x is not None else _v
          _v = arg.pop('y', None)
          self.y = y if y is not None else _v
          _v = arg.pop('z', None)
          self.z = z if z is not None else _v
  
          # Process unknown kwargs
          # ----------------------
          self._process_kwargs(**dict(arg, **kwargs))
  