code: def test_label_nonagg():
      # This should not crash even if the canvas doesn't have a get_renderer().
      plt.clabel(plt.contour([[1, 2], [3, 4]]))
  
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 26 for calling a global function with example usage: test_label_nonagg() without return types