code: def close_or_save(pdf, fig):
      if pdf_output:
          pdf.savefig(fig)
  
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 1 for calling a global function with example usage: close_or_save(pdf, fig) without return types