code: def iter_run_scalars(run):
      index = RunIndex()
      index.refresh([run], ["scalar"])
      for s in index.run_scalars(run):
          yield s
  
imports: import logging
  import os
  import sqlite3
  from guild import run_util
  from guild import tfevent
  from guild import util
  from guild import var
label_desc: Use image node_id 11 for calling a global function with example usage: iter_run_scalars(run) without return types