code: def test_bbox_inches():
      mpl.rcParams.update(
          {"font.family": "serif", "pgf.rcfonts": False}
      )
      fig, (ax1, ax2) = plt.subplots(1, 2)
      ax1.plot(range(5))
      ax2.plot(range(5))
      plt.tight_layout()
      bbox = ax1.get_window_extent().transformed(
          fig.dpi_scale_trans.inverted()
      )
      compare_figure(
          "pgf_bbox_inches.pdf",
          savefig_kwargs={"bbox_inches": bbox},
          tol=0,
      )
  
imports: import datetime
  from io import BytesIO
  import os
  import shutil
  import numpy
  from packaging.version import parse
  import pytest
  import matplotlib
  import matplotlib.pyplot
  from matplotlib.testing import _has_tex_package, _check_for_pgf
  from matplotlib.testing.exceptions import ImageComparisonFailure
  from matplotlib.testing.compare import compare_images
  from matplotlib.backends.backend_pgf import PdfPages
  from matplotlib.testing.decorators import _image_directories, check_figures_equal, image_comparison
  from matplotlib.testing._markers import needs_ghostscript, needs_pgf_lualatex, needs_pgf_pdflatex, needs_pgf_xelatex
label_desc: Use image node_id 9 for calling a global function with example usage: test_bbox_inches() without return types