code: def underify(g):
      return "_".join(
          NON_REPO_PATTERN.sub("_", s.lower()) for s in g if s
      )
  
file_path: tensorboard/tensorboard/tools/import_google_fonts.py
imports: import hashlib
  import httplib
  import os
  import re
  import sys
  import urlparse
  from absl import app
  from absl import flags
label_desc: Use image node_id 5 for calling a global function with example usage: underify(g) and returns: str