code: def random_str(size: int = 16) -> str:
      return "".join(
          random.choices(string.ascii_lowercase + string.digits, k=size)
      )
  
file_path: matchering/matchering/utils.py
imports: import os
  import random
  import string
  import math
  from datetime import timedelta
label_desc: Use image node_id 2 for calling a global function with example usage: random_str(size) and returns: str