class_docstr: DEPRECATED since IPython 5.0
  
  Manage PyOS_InputHook for different GUI toolkits.
  
  This class installs various hooks under ``PyOSInputHook`` to handle
  GUI event loop integration.
class_docstr_tok: ["DEPRECATED","since","IPython","5.0","Manage","PyOS_InputHook","for","different","GUI","toolkits",".","This","class","installs","various","hooks","under","``","PyOSInputHook","``","to","handle","GUI","event","loop","integration","."]
code: def _reset(self):
      self._callback_pyfunctype = None
      self._callback = None
      self._installed = False
      self._current_gui = None
  
imports: import os
  import platform
  import sys
  from distutils.version import LooseVersion
  from warnings import warn
label_desc: Use image node_id 2 for calling the InputHookManager obj's underlying member method code with example usage: obj._reset() without return types