code: def read_decimalnl_long(f):
      r"""
      >>> import io
  
      >>> read_decimalnl_long(io.BytesIO(b"1234L\n56"))
      1234
  
      >>> read_decimalnl_long(io.BytesIO(b"123456789012345678901234L\n6"))
      123456789012345678901234
      """
  
      s = read_stringnl(f, decode=False, stripquotes=False)
      if s[-1:] == b"L":
          s = s[:-1]
      return int(s)
  
imports: import codecs
  import io
  import pickle
  import re
  import sys
  from struct import unpack
  from pickle import decode_long
label_desc: Use image node_id 20 for calling a global function with example usage: read_decimalnl_long(f) and returns: int