code: def test_subfigure_clabel():
      # Smoke test for gh#23173
      delta = 0.025
      x = np.arange(-3.0, 3.0, delta)
      y = np.arange(-2.0, 2.0, delta)
      X, Y = np.meshgrid(x, y)
      Z1 = np.exp(-(X**2) - Y**2)
      Z2 = np.exp(-((X - 1) ** 2) - (Y - 1) ** 2)
      Z = (Z1 - Z2) * 2
  
      fig = plt.figure()
      figs = fig.subfigures(nrows=1, ncols=2)
  
      for f in figs:
          ax = f.subplots()
          CS = ax.contour(X, Y, Z)
          ax.clabel(CS, inline=True, fontsize=10)
          ax.set_title("Simplest default with labels")
  
imports: import datetime
  import platform
  import re
  from unittest import mock
  import contourpy
  import numpy
  from numpy.testing import assert_array_almost_equal, assert_array_almost_equal_nulp, assert_array_equal
  import matplotlib
  from matplotlib import pyplot, rc_context, ticker
  from matplotlib.colors import LogNorm, same_color
  import matplotlib.patches
  from matplotlib.testing.decorators import check_figures_equal, image_comparison
  import pytest
label_desc: Use image node_id 39 for calling a global function with example usage: test_subfigure_clabel() without return types