code: def get_uuid():
      return str(uuid.uuid4())
  
imports: from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, Table, Text
  from sqlalchemy.orm import relationship, backref, validates
  from sqlalchemy.ext.declarative import declarative_base
  import uuid
  import datetime
label_desc: Use image node_id 1 for calling a global function with example usage: get_uuid() and returns: str