code: def header_check(octet):
      """Return True if the octet should be escaped with header quopri."""
      return chr(octet) != _QUOPRI_HEADER_MAP[octet]
  
file_path: catboost/contrib/tools/python3/src/Lib/email/quoprimime.py
imports: import re
  from string import ascii_letters, digits, hexdigits
label_desc: Use image node_id 1 for calling a global function with example usage: header_check(octet) and returns: unknown