class_docstr: Abstraction for any input.
  
  An instance of this class can be given to the constructor of a
  :class:`~prompt_toolkit.application.Application` and will also be
  passed to the :class:`~prompt_toolkit.eventloop.base.EventLoop`.
docstr: Fileno for putting this in an event loop.
docstr_tok: ["Fileno","for","putting","this","in","an","event","loop","."]
code: def fileno(self) -> int:
      """
      Fileno for putting this in an event loop.
      """
  
imports: from __future__ import annotations
  from abc import ABCMeta, abstractmethod, abstractproperty
  from contextlib import contextmanager
  from typing import Callable, ContextManager, Generator
  from prompt_toolkit.key_binding import KeyPress
label_desc: Use image node_id 1 for calling the Input obj's underlying member method code with example usage: obj.fileno() without return types