code: def generate_id():
      return uuid.uuid4().hex[:8]
  
imports: import collections
  import json
  import sys
  import uuid
  from functools import reduce
  from alembic import op
  from sqlalchemy import Column, ForeignKey, Integer, String, Table, Text
  from sqlalchemy.ext.declarative import declarative_base
  from sqlalchemy.orm import relationship
  from superset import db
label_desc: Use image node_id 3 for calling a global function with example usage: generate_id() and returns: uuid