code: def test_tight_layout6():
      """Test tight_layout for gridspec."""
  
      # This raises warnings since tight layout cannot
      # do this fully automatically. But the test is
      # correct since the layout is manually edited
      with warnings.catch_warnings():
          warnings.simplefilter("ignore", UserWarning)
          fig = plt.figure()
  
          gs1 = mpl.gridspec.GridSpec(2, 1)
          ax1 = fig.add_subplot(gs1[0])
          ax2 = fig.add_subplot(gs1[1])
  
          example_plot(ax1)
          example_plot(ax2)
  
          gs1.tight_layout(fig, rect=[0, 0, 0.5, 1])
  
          gs2 = mpl.gridspec.GridSpec(3, 1)
  
          for ss in gs2:
              ax = fig.add_subplot(ss)
              example_plot(ax)
              ax.set_title("")
              ax.set_xlabel("")
  
          ax.set_xlabel("x-label", fontsize=12)
  
          gs2.tight_layout(fig, rect=[0.5, 0, 1, 1], h_pad=0.45)
  
          top = min(gs1.top, gs2.top)
          bottom = max(gs1.bottom, gs2.bottom)
  
          gs1.tight_layout(
              fig,
              rect=[
                  None,
                  0 + (bottom - gs1.bottom),
                  0.5,
                  1 - (gs1.top - top),
              ],
          )
          gs2.tight_layout(
              fig,
              rect=[
                  0.5,
                  0 + (bottom - gs2.bottom),
                  None,
                  1 - (gs2.top - top),
              ],
              h_pad=0.45,
          )
  
imports: import warnings
  import numpy
  from numpy.testing import assert_array_equal
  import pytest
  import matplotlib
  from matplotlib.testing.decorators import image_comparison
  import matplotlib.pyplot
  from matplotlib.offsetbox import AnchoredOffsetbox, DrawingArea
  from matplotlib.patches import Rectangle
label_desc: Use image node_id 7 for calling a global function with example usage: test_tight_layout6() without return types