code: def parse_create_tables(schema):
      return [
          _CreateTable(
              table=m.group("table"),
              columns=set(m.group("columns").splitlines()),
          )
          for m in _CREATE_TABLE_REGEX.finditer(schema)
      ]
  
imports: import difflib
  import re
  from collections import namedtuple
  from pathlib import Path
  import pytest
  import sqlalchemy
  from packaging.version import Version
  from sqlalchemy import create_engine
  from sqlalchemy.schema import CreateTable, MetaData
  import mlflow
  from mlflow.environment_variables import MLFLOW_TRACKING_URI
label_desc: Use image node_id 4 for calling a global function with example usage: parse_create_tables(schema) and returns: unknown