code: def teardown_module():
      if pdf_output:
          pdf.close()
  
imports: import numpy
  import pandas
  import pytest
  from statsmodels.imputation import mice
  import statsmodels.api
  from numpy.testing import assert_equal, assert_allclose
  import warnings
label_desc: Use image node_id 2 for calling a global function with example usage: teardown_module() without return types