code: def numerize_halves(s, ignore=None):
      if ignore is None:
          ignore = []
      if "half" in ignore:
          return s
      return isub(r"\bhalf\b", "1/2", s)
  
imports: import re
  from .None import consts
label_desc: Use image node_id 13 for calling a global function with example usage: numerize_halves(s, ignore) and returns: isub, s