code: def callback(point):
      surf.points[0] = point
  
file_path: pyvista/examples/03-widgets/sphere-widget.py
imports: import numpy
  import pyvista
  import numpy
  import pyvista
  import numpy
  from scipy.interpolate import griddata
  import pyvista
label_desc: Use image node_id 1 for calling a global function with example usage: callback(point) without return types