code: def test_blank_subplots():
      fig = plt.figure()
      gs = GridSpec(4, 6)
      ax1 = fig.add_subplot(gs[0, 1])
      ax1.plot(D["x1"], D["y1"])
      fig.add_subplot(gs[1, 1])
      fig.add_subplot(gs[2:, 1])
      fig.add_subplot(gs[0, 2:])
      fig.add_subplot(gs[1:3, 2:4])
      fig.add_subplot(gs[3, 2:5])
      fig.add_subplot(gs[1:3, 4:])
      fig.add_subplot(gs[3, 5])
      gs.update(hspace=0.6, wspace=0.6)
      renderer = run_fig(fig)
  
      for data_no, data_dict in enumerate(renderer.plotly_fig["data"]):
          d1, d2 = strip_dict_params(
              data_dict, BLANK_SUBPLOTS["data"][data_no], ignore=["uid"]
          )
          equivalent, msg = compare_dict(d1, d2)
  
      equivalent, msg = compare_dict(
          renderer.plotly_fig["layout"], BLANK_SUBPLOTS["layout"]
      )
      assert equivalent, msg
  
imports: import pytest
  from plotly import optional_imports
  from plotly.tests.utils import compare_dict, strip_dict_params
  from plotly.tests.test_optional.optional_utils import run_fig
  from plotly.tests.test_optional.test_matplotlylib.data.subplots import *
label_desc: Use image node_id 1 for calling a global function with example usage: test_blank_subplots() without return types