code: def test_constrained_layout13():
      """Test that padding works."""
      fig, axs = plt.subplots(2, 2, layout="constrained")
      for ax in axs.flat:
          pcm = example_pcolor(ax, fontsize=12)
          fig.colorbar(pcm, ax=ax, shrink=0.6, aspect=20.0, pad=0.02)
      with pytest.raises(TypeError):
          fig.get_layout_engine().set(wpad=1, hpad=2)
      fig.get_layout_engine().set(w_pad=24.0 / 72.0, h_pad=24.0 / 72.0)
  
imports: import gc
  import numpy
  import pytest
  import matplotlib
  from matplotlib.testing.decorators import image_comparison
  import matplotlib.pyplot
  import matplotlib.transforms
  from matplotlib import gridspec, ticker
label_desc: Use image node_id 17 for calling a global function with example usage: test_constrained_layout13() without return types