code: def read_schemas(files: List[str]) -> List[Schema]:
      """Read all the schemas in a list of files."""
      schemas = []
      for file in files:
          urlend = os.path.relpath(file, os.path.dirname(__file__))
          url = os.path.join(URLBASE, urlend)
          with open(file) as f:
              schema = Schema(url, f.read())
              schemas.append(schema)
      # Sort schemas so that the output is deterministic.
      schemas.sort(key=lambda s: s.url)
      return schemas
  
imports: import argparse
  import json
  import os
  import re
  import sys
  from typing import List, Optional, Tuple
label_desc: Use image node_id 3 for calling a global function with example usage: read_schemas(files) and returns: schemas