code: def pyplot():
      """Setup and teardown fixture for matplotlib.
  
      This fixture checks if we can import matplotlib. If not, the tests will be
      skipped. Otherwise, we close the figures before and after running the
      functions.
  
      Returns
      -------
      pyplot : module
          The ``matplotlib.pyplot`` module.
      """
      pyplot = pytest.importorskip("matplotlib.pyplot")
      pyplot.close("all")
      yield pyplot
      pyplot.close("all")
  
imports: import builtins
  import platform
  import sys
  from contextlib import suppress
  from functools import wraps
  from os import environ
  from unittest import SkipTest
  import joblib
  import numpy
  import pytest
  from _pytest.doctest import DoctestItem
  from threadpoolctl import threadpool_limits
  from sklearn import config_context, set_config
  from sklearn._min_dependencies import PYTEST_MIN_VERSION
  from sklearn.datasets import fetch_20newsgroups, fetch_20newsgroups_vectorized, fetch_california_housing, fetch_covtype, fetch_kddcup99, fetch_olivetti_faces, fetch_rcv1
  from sklearn.tests import random_seed
  from sklearn.utils import _IS_32BIT
  from sklearn.utils.fixes import np_base_version, parse_version, sp_version
label_desc: Use image node_id 6 for calling a global function with example usage: pyplot() without return types