code: def test_compressor_export_model(self):
      c_framework = "torch"
      c_type = "pruning"
      mask_path = None
  
      c = compression.Compressor(
          self.model,
          self.nni_compressor,
          c_framework,
          c_type,
          self.c_str,
      )
      self.assertRaises(
          AttributeError,
          c.export_model,
          self.model_path,
          mask_path,
          save_model=True,
      )
  
imports: import unittest
  import os
  from shutil import copyfile, rmtree
  from subprocess import call
  from aup import compression, Experiment, BasicConfig
  from aup.utils import get_default_username
  from aup.compression.utils import verify_compression_config, run_non_automatic_experiment, adjust_compression_config
label_desc: Use image node_id 4 for calling the CompressorTestCase obj's underlying member method code with example usage: obj.test_compressor_export_model() without return types