code: def get_schema():
      return fields.Schema(
          id=fields.ID(stored=True),
          num=fields.NUMERIC(stored=True),
          frac=fields.NUMERIC(float, stored=True),
          tag=fields.ID(stored=True),
          ev=fields.ID,
      )
  
imports: from __future__ import with_statement
  from datetime import datetime, timedelta
  import random
  from whoosh import fields, query, sorting, columns
  from whoosh.compat import u
  from whoosh.compat import permutations, xrange
  from whoosh.filedb.filestore import RamStorage
  from whoosh.util.testing import TempIndex
label_desc: Use image node_id 1 for calling a global function with example usage: get_schema() and returns: fields