code: def _normalize_attr_case(s):
      m = re.match("([^:]+:)(.*)", s)
      if m:
          return m.group(1).lower() + m.group(2)
      return s
  
imports: import logging
  import os
  import re
  import subprocess
  import sys
  from guild import util
label_desc: Use image node_id 12 for calling a global function with example usage: _normalize_attr_case(s) and returns: s, unknown