docstr: Alters specular reflection; the rougher the surface, the wider
  and less contrasty the shine.
  
  The 'roughness' property is a number and may be specified as:
    - An int or float in the interval [0, 1]
  
  Returns
  -------
  int|float
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code: def roughness(self):
      """
      Alters specular reflection; the rougher the surface, the wider
      and less contrasty the shine.
  
      The 'roughness' property is a number and may be specified as:
        - An int or float in the interval [0, 1]
  
      Returns
      -------
      int|float
      """
      return self["roughness"]
  
file_path: catboost/contrib/python/plotly/py2/plotly/graph_objs/isosurface/_lighting.py
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 9 for calling the Lighting obj's underlying member method code with example usage: obj.roughness() and returns: self