code: def rand_ascii_str(length=30):
      charlist = [*string.ascii_letters]
      return "".join(random.choice(charlist) for _ in range(length))
  
file_path: lightwood/tests/utils/data_generation.py
imports: import random
  import string
  import datetime
  from math import log
label_desc: Use image node_id 2 for calling a global function with example usage: rand_ascii_str(length) and returns: str