code: def hash_string(string):
      """Hashes an input string using SHA256"""
      return hashlib.sha256(string).hexdigest()
  
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 2 for calling a global function with example usage: hash_string(string) and returns: hashlib