code: def normalize_str(input_str):
      """Normalize an input string"""
      return input_str.strip().lower().replace("  ", " ")
  
file_path: NeMo/nemo/collections/nlp/data/text_normalization/utils.py
imports: import string
  from copy import deepcopy
  import regex
  from tqdm import tqdm
  from nemo.collections.nlp.data.text_normalization import constants
label_desc: Use image node_id 7 for calling a global function with example usage: normalize_str(input_str) and returns: input_str