code: def register(name):
      """
      Store handler in the `_readline_commands` dictionary.
      """
      assert isinstance(name, six.text_type)
  
      def decorator(handler):
          assert callable(handler)
  
          _readline_commands[name] = handler
          return handler
  
      return decorator
  
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 1 for calling a global function with example usage: register(name) and returns: decorator, handler