code: def yank_nth_arg(event):
      """
      Insert the first argument of the previous command. With an argument, insert
      the nth word from the previous command (start counting at 0).
      """
      n = event.arg if event.arg_present else None
      event.current_buffer.yank_nth_arg(n)
  
imports: from __future__ import unicode_literals
  from prompt_toolkit.enums import IncrementalSearchDirection, SEARCH_BUFFER
  from prompt_toolkit.selection import PasteMode
  from six.moves import range
  import six
  from .completion import generate_completions, display_completions_like_readline
  from prompt_toolkit.document import Document
  from prompt_toolkit.enums import EditingMode
  from prompt_toolkit.key_binding.input_processor import KeyPress
  from prompt_toolkit.keys import Keys
label_desc: Use image node_id 33 for calling a global function with example usage: yank_nth_arg(event) without return types