code: def make_multi_index(ix):
      for i in xrange(0, len(docs), 3):
          w = ix.writer()
          for doc in docs[i : i + 3]:
              w.add_document(ev=u("a"), **doc)
          w.commit(merge=False)
  
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 3 for calling a global function with example usage: make_multi_index(ix) without return types