code: def test_xkcd_no_cm():
      assert mpl.rcParams["path.sketch"] is None
      plt.xkcd()
      assert mpl.rcParams["path.sketch"] == (1, 100, 2)
      np.testing.break_cycles()
      assert mpl.rcParams["path.sketch"] == (1, 100, 2)
  
imports: from contextlib import contextmanager
  from pathlib import Path
  from tempfile import TemporaryDirectory
  import sys
  import numpy
  import pytest
  import matplotlib
  from matplotlib import pyplot, style
  from matplotlib.style.core import USER_LIBRARY_PATHS, STYLE_EXTENSION
label_desc: Use image node_id 14 for calling a global function with example usage: test_xkcd_no_cm() without return types