code: def is_valid_json(x):
      """Returns true if x can be JSON serialized
  
      Args:
          x: Object to test
      """
      try:
          json.dumps(x)
          return True
      except TypeError:
          return False
  
imports: from __future__ import absolute_import, print_function, division, unicode_literals
  import imp
  import sys
  import os
  import hashlib
  import json
  import numpy
  from sqlalchemy import create_engine
  from sqlalchemy.orm import Session
  from six import exec_, iteritems
  from sklearn import datasets
  from sklearn import model_selection
  from xcessiv import app, exceptions
label_desc: Use image node_id 7 for calling a global function with example usage: is_valid_json(x) and returns: True, False