code: def _normalize_text(self, text):
      text = "".join(
          filter(
              lambda x: x in (string.digits + string.ascii_letters),
              text,
          )
      )
      return text.lower()
  
imports: from rapidfuzz.distance import Levenshtein
  from difflib import SequenceMatcher
  import numpy
  import string
label_desc: Use image node_id 2 for calling the RecMetric obj's underlying member method code with example usage: obj._normalize_text(text) and returns: text