code: def test_issue3623(self):
      self.assertRaises(
          ValueError, json.decoder.scanstring, "xxx", 1, "xxx"
      )
      self.assertRaises(
          UnicodeDecodeError,
          json.encoder.encode_basestring_ascii,
          b("xx\xff"),
      )
  
file_path: catboost/contrib/python/simplejson/py2/simplejson/tests/test_scanstring.py
imports: import sys
  from unittest import TestCase
  import simplejson
  import simplejson.decoder
  from simplejson.compat import b, PY3
label_desc: Use image node_id 4 for calling the TestScanString obj's underlying member method code with example usage: obj.test_issue3623() without return types