code: def get_by_name(name):
      """
      Return the handler for the (Readline) command with the given name.
      """
      try:
          return _readline_commands[name]
      except KeyError:
          raise KeyError("Unknown readline command: %r" % name)
  
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 2 for calling a global function with example usage: get_by_name(name) and returns: _readline_commands