code: def last_blank(src):
      """Determine if the input source ends in a blank.
  
      A blank is either a newline or a line consisting of whitespace.
  
      Parameters
      ----------
      src : string
          A single or multiline string.
      """
      if not src:
          return False
      ll = src.splitlines()[-1]
      return (ll == "") or ll.isspace()
  
imports: from warnings import warn
  import ast
  import codeop
  import io
  import re
  import sys
  import tokenize
  import warnings
  from typing import List, Tuple, Union, Optional
  from types import CodeType
  from IPython.core.inputtransformer import leading_indent, classic_prompt, ipy_prompt, cellmagic, assemble_logical_lines, help_end, escaped_commands, assign_from_magic, assign_from_system, assemble_python_lines
  from IPython.utils import tokenutil
  from IPython.core.inputtransformer import ESC_SHELL, ESC_SH_CAP, ESC_HELP, ESC_HELP2, ESC_MAGIC, ESC_MAGIC2, ESC_QUOTE, ESC_QUOTE2, ESC_PAREN, ESC_SEQUENCES
label_desc: Use image node_id 4 for calling a global function with example usage: last_blank(src) and returns: unknown, False