code: def test_get_exceptions():
      ppdb = PandasMmcif()
      ppdb.read_mmcif(TESTDATA_FILENAME)
      ppdb.get("main-chai")
  
imports: import os
  from urllib.error import HTTPError
  from urllib.request import urlopen
  from pathlib import Path
  import numpy
  import pandas
  from biopandas.mmcif import PandasMmcif
  from biopandas.pdb import PandasPdb
  from biopandas.testutils import assert_raises
  from nose.tools import raises
  from pandas.testing import assert_frame_equal
label_desc: Use image node_id 10 for calling a global function with example usage: test_get_exceptions() without return types