code: def use_style(circuit):
      fig, ax = qml.draw_mpl(circuit, style="sketch")(1.2345, 1.2345)
  
      plt.savefig(folder / "sketch_style.png")
      plt.close()
      qml.drawer.use_style("black_white")
  
file_path: pennylane/doc/_static/draw_mpl/draw_mpl_examples.py
imports: import pathlib
  import matplotlib.pyplot
  import pennylane
  from pennylane import draw_mpl
label_desc: Use image node_id 7 for calling a global function with example usage: use_style(circuit) without return types