text: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
  
  
  class Lightposition(BaseTraceHierarchyType):
  
      # x
      # -
      @property
      def x(self):
          """
          Numeric vector, representing the X coordinate for each vertex.
      
          The 'x' property is a number and may be specified as:
            - An int or float in the interval [-100000, 100000]
  
          Returns
          -------
          int|float
          """
          return self['x']
  
      @x.setter
      def x(self, val):
          self['x'] = val
  
      # y
      # -
      @property
      def y(self):
          """
          Numeric vector, representing the Y coordinate for each vertex.
      
          The 'y' property is a number and may be specified as:
            - An int or float in the interval [-100000, 100000]
  
          Returns
          -------
          int|float
          """
          return self['y']
  
      @y.setter
      def y(self, val):
          self['y'] = val
  
      # z
      # -
      @property
      def z(self):
          """
          Numeric vector, representing the Z coordinate for each vertex.
      
          The 'z' property is a number and may be specified as:
            - An int or float in the interval [-100000, 100000]
  
          Returns
          -------
          int|float
          """
          return self['z']
  
      @z.setter
      def z(self, val):
          self['z'] = val
  
      # property parent name
      # --------------------
      @property
      def _parent_path_str(self):
          return 'mesh3d'
  
      # Self properties description
      # ---------------------------
      @property
      def _prop_descriptions(self):
          return """\
          x
              Numeric vector, representing the X coordinate for each
              vertex.
          y
              Numeric vector, representing the Y coordinate for each
              vertex.
          z
              Numeric vector, representing the Z coordinate for each
              vertex.
          """
  
      def __init__(self, arg=None, x=None, y=None, z=None, **kwargs):
          """
          Construct a new Lightposition object
          
          Parameters
          ----------
          arg
              dict of properties compatible with this constructor or
              an instance of plotly.graph_objs.mesh3d.Lightposition
          x
              Numeric vector, representing the X coordinate for each
              vertex.
          y
              Numeric vector, representing the Y coordinate for each
              vertex.
          z
              Numeric vector, representing the Z coordinate for each
              vertex.
  
          Returns
          -------
          Lightposition
          """
          super(Lightposition, self).__init__('lightposition')
  
          # 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.mesh3d.Lightposition 
  constructor must be a dict or 
  an instance of plotly.graph_objs.mesh3d.Lightposition"""
              )
  
          # Handle skip_invalid
          # -------------------
          self._skip_invalid = kwargs.pop('skip_invalid', False)
  
          # Import validators
          # -----------------
          from plotly.validators.mesh3d import (lightposition as v_lightposition)
  
          # Initialize validators
          # ---------------------
          self._validators['x'] = v_lightposition.XValidator()
          self._validators['y'] = v_lightposition.YValidator()
          self._validators['z'] = v_lightposition.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))
  
          # Reset skip_invalid
          # ------------------
          self._skip_invalid = False
  