code: def _get_importer(input_file):
      
      __, ext = os.path.splitext(input_file)
      ext = ext.lower()
  
      if "ostriz" in input_file:
          from dump2polarion.results import ostriztools
  
          importer = ostriztools.import_ostriz
      elif ext == ".xml":
          # expect junit-report from pytest
          from dump2polarion.results import junittools
  
          importer = junittools.import_junit
      elif ext == ".csv":
          from dump2polarion.results import csvtools
  
          importer = csvtools.import_csv
      elif ext in dbtools.SQLITE_EXT:
          importer = dbtools.import_sqlite
      elif ext == ".json":
          from dump2polarion.results import jsontools
  
          importer = jsontools.import_json
      else:
          raise Dump2PolarionException("Cannot recognize type of input data, add file extension.")
  
      return importer
docs: Selects importer based on input file type.