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: import ast
  import codeop
  import re
  import sys
  import warnings
  from IPython.utils.py3compat import cast_unicode
  from IPython.core.inputtransformer import leading_indent, classic_prompt, ipy_prompt, strip_encoding_cookie, cellmagic, assemble_logical_lines, help_end, escaped_commands, assign_from_magic, assign_from_system, assemble_python_lines
  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 2 for calling a global function with example usage: last_blank(src) and returns: unknown, False