code: def test_pdb_with_insertion_codes():
      PDB_2D7T_PATH = os.path.join(
          os.path.dirname(__file__), "data", "2d7t.mmtf"
      )
  
      ppdb = PandasMmtf().read_mmtf(PDB_2D7T_PATH)
      sequence = ppdb.amino3to1()
      assert (
          "".join(sequence[50:60]["residue_name"].values)
          == "INPKSGDTNY"
      )
  
imports: import os
  import numpy
  from biopandas.mmtf import PandasMmtf
label_desc: Use image node_id 4 for calling a global function with example usage: test_pdb_with_insertion_codes() without return types