code: def test_pdflatex():
      rc_pdflatex = {
          "font.family": "serif",
          "pgf.rcfonts": False,
          "pgf.texsystem": "pdflatex",
          "pgf.preamble": (
              "\\usepackage[utf8x]{inputenc}"
              "\\usepackage[T1]{fontenc}"
          ),
      }
      mpl.rcParams.update(rc_pdflatex)
      create_figure()
  
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 5 for calling a global function with example usage: test_pdflatex() without return types