code: def encodestring(s, quotetabs=False, header=False):
      if b2a_qp is not None:
          return b2a_qp(s, quotetabs=quotetabs, header=header)
      from io import BytesIO
  
      infp = BytesIO(s)
      outfp = BytesIO()
      encode(infp, outfp, quotetabs, header)
      return outfp.getvalue()
  
file_path: catboost/contrib/tools/python3/src/Lib/quopri.py
label_desc: Use image node_id 4 for calling a global function with example usage: encodestring(s, quotetabs, header) and returns: outfp, b2a_qp