code: def view_surface():
      from enthought.mayavi import mlab
  
      g = Grid(surface_param)
      xyz_grid = g[-1:1:201j, -1:1:101j]
      x, y, z = xyz_grid.transposed_values
      mlab.mesh(x, y, z)
      mlab.draw()
  
file_path: nipy/nipy/core/reference/tests/test_parametrized_surface.py
imports: import numpy
  from nipy.core.api import CoordinateMap, CoordinateSystem, Grid
label_desc: Use image node_id 7 for calling a global function with example usage: view_surface() without return types