code: def encode_b(bstring):
      return base64.b64encode(bstring).decode("ascii")
  
file_path: cpython/Lib/email/_encoded_words.py
imports: import re
  import base64
  import binascii
  import functools
  from string import ascii_letters, digits
  from email import errors
label_desc: Use image node_id 5 for calling a global function with example usage: encode_b(bstring) and returns: base64