code: def _format_axes(ax):
      """Visualization options for the 3D axes."""
      # Turn gridlines off
      ax.grid(False)
      # Suppress tick labels
      for dim in (ax.xaxis, ax.yaxis, ax.zaxis):
          dim.set_ticks([])
      # Set axes labels
      ax.set_xlabel("x")
      ax.set_ylabel("y")
      ax.set_zlabel("z")
  
imports: import networkx
  import numpy
  import matplotlib.pyplot
  from mpl_toolkits.mplot3d import Axes3D
label_desc: Use image node_id 1 for calling a global function with example usage: _format_axes(ax) without return types