code: def test_lazy_imports():
      source = textwrap.dedent(
          """
      import sys
  
      import matplotlib.figure
      import matplotlib.backend_bases
      import matplotlib.pyplot
  
      assert 'matplotlib._tri' not in sys.modules
      assert 'matplotlib._qhull' not in sys.modules
      assert 'matplotlib._contour' not in sys.modules
      assert 'urllib.request' not in sys.modules
      """
      )
  
      subprocess.check_call(
          [sys.executable, "-c", source],
          env={
              **os.environ,
              "MPLBACKEND": "",
              "MATPLOTLIBRC": os.devnull,
          },
      )
  
file_path: matplotlib/lib/matplotlib/tests/test_basic.py
imports: import builtins
  import os
  import subprocess
  import sys
  import textwrap
label_desc: Use image node_id 3 for calling a global function with example usage: test_lazy_imports() without return types