update

.github/workflows/mypy.yml

@@ -1,45 +1,34 b''
 name: Run MyPy
 
 on:
   push:
     branches: [ master, 7.x]
   pull_request:
     branches: [ master, 7.x]
 
 jobs:
   build:
 
     runs-on: ubuntu-latest
     strategy:
       matrix:
         python-version: [3.8]
 
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install mypy pyflakes flake8
     - name: Lint with mypy
       run: |
-        mypy IPython/terminal/ptutils.py
-        mypy IPython/core/magics/*.py
-        mypy IPython/terminal/__init__.py
-        mypy IPython/terminal/console.py
-        #mypy IPython/terminal/debugger.py
-        #mypy IPython/terminal/embed.py
-        mypy IPython/terminal/interactiveshell.py
-        mypy IPython/terminal/ipapp.py
-        mypy IPython/terminal/magics.py
-        mypy IPython/terminal/prompts.py
-        mypy IPython/terminal/ptshell.py
-        mypy IPython/terminal/ptutils.py
-        mypy IPython/terminal/shortcuts.py
-        mypy IPython/core/c*.py
+        mypy -p IPython.terminal
+        mypy -p IPython.core.magics
     - name: Lint with pyflakes
       run: |
         flake8  IPython/core/magics/script.py
+        flake8  IPython/core/magics/packaging.py

IPython/terminal/debugger.py

@@ -1,166 +1,166 b''
 import asyncio
 import sys
 import threading
 
 from IPython.core.debugger import Pdb
 
 from IPython.core.completer import IPCompleter
 from .ptutils import IPythonPTCompleter
 from .shortcuts import create_ipython_shortcuts
 from . import embed
 
 from pygments.token import Token
 from prompt_toolkit.shortcuts.prompt import PromptSession
 from prompt_toolkit.enums import EditingMode
 from prompt_toolkit.formatted_text import PygmentsTokens
 
 from prompt_toolkit import __version__ as ptk_version
 PTK3 = ptk_version.startswith('3.')
 
 
 class TerminalPdb(Pdb):
     """Standalone IPython debugger."""
 
     def __init__(self, *args, pt_session_options=None, **kwargs):
         Pdb.__init__(self, *args, **kwargs)
         self._ptcomp = None
         self.pt_init(pt_session_options)
 
     def pt_init(self, pt_session_options=None):
         """Initialize the prompt session and the prompt loop
         and store them in self.pt_app and self.pt_loop.
 
         Additional keyword arguments for the PromptSession class
         can be specified in pt_session_options.
         """
         if pt_session_options is None:
             pt_session_options = {}
 
         def get_prompt_tokens():
             return [(Token.Prompt, self.prompt)]
 
         if self._ptcomp is None:
             compl = IPCompleter(
                 shell=self.shell, namespace={}, global_namespace={}, parent=self.shell
             )
             # add a completer for all the do_ methods
             methods_names = [m[3:] for m in dir(self) if m.startswith("do_")]
 
             def gen_comp(self, text):
                 return [m for m in methods_names if m.startswith(text)]
             import types
             newcomp = types.MethodType(gen_comp, compl)
             compl.custom_matchers.insert(0, newcomp)
             # end add completer.
 
             self._ptcomp = IPythonPTCompleter(compl)
 
         options = dict(
             message=(lambda: PygmentsTokens(get_prompt_tokens())),
             editing_mode=getattr(EditingMode, self.shell.editing_mode.upper()),
             key_bindings=create_ipython_shortcuts(self.shell),
             history=self.shell.debugger_history,
             completer=self._ptcomp,
             enable_history_search=True,
             mouse_support=self.shell.mouse_support,
             complete_style=self.shell.pt_complete_style,
             style=self.shell.style,
             color_depth=self.shell.color_depth,
         )
 
         if not PTK3:
             options['inputhook'] = self.shell.inputhook
         options.update(pt_session_options)
         self.pt_loop = asyncio.new_event_loop()
         self.pt_app = PromptSession(**options)
 
     def cmdloop(self, intro=None):
         """Repeatedly issue a prompt, accept input, parse an initial prefix
         off the received input, and dispatch to action methods, passing them
         the remainder of the line as argument.
 
         override the same methods from cmd.Cmd to provide prompt toolkit replacement.
         """
         if not self.use_rawinput:
             raise ValueError('Sorry ipdb does not support use_rawinput=False')
 
         # In order to make sure that prompt, which uses asyncio doesn't
         # interfere with applications in which it's used, we always run the
         # prompt itself in a different thread (we can't start an event loop
         # within an event loop). This new thread won't have any event loop
         # running, and here we run our prompt-loop.
 
         self.preloop()
 
         try:
             if intro is not None:
                 self.intro = intro
             if self.intro:
                 self.stdout.write(str(self.intro)+"\n")
             stop = None
             while not stop:
                 if self.cmdqueue:
                     line = self.cmdqueue.pop(0)
                 else:
                     self._ptcomp.ipy_completer.namespace = self.curframe_locals
                     self._ptcomp.ipy_completer.global_namespace = self.curframe.f_globals
 
                     # Run the prompt in a different thread.
                     line = ''
                     keyboard_interrupt = False
 
                     def in_thread():
                         nonlocal line, keyboard_interrupt
                         try:
                             line = self.pt_app.prompt()
                         except EOFError:
                             line = 'EOF'
                         except KeyboardInterrupt:
                             keyboard_interrupt = True
 
                     th = threading.Thread(target=in_thread)
                     th.start()
                     th.join()
 
                     if keyboard_interrupt:
                         raise KeyboardInterrupt
 
                 line = self.precmd(line)
                 stop = self.onecmd(line)
                 stop = self.postcmd(stop, line)
             self.postloop()
         except Exception:
             raise
 
     def do_interact(self, arg):
         ipshell = embed.InteractiveShellEmbed(
             config=self.shell.config,
             banner1="*interactive*",
             exit_msg="*exiting interactive console...*",
         )
         global_ns = self.curframe.f_globals
         ipshell(
             module=sys.modules.get(global_ns["__name__"], None),
             local_ns=self.curframe_locals,
         )
 
 
 def set_trace(frame=None):
     """
     Start debugging from `frame`.
 
     If frame is not specified, debugging starts from caller's frame.
     """
     TerminalPdb().set_trace(frame or sys._getframe().f_back)
 
 
 if __name__ == '__main__':
     import pdb
     # IPython.core.debugger.Pdb.trace_dispatch shall not catch
     # bdb.BdbQuit. When started through __main__ and an exception
     # happened after hitting "c", this is needed in order to
     # be able to quit the debugging session (see #9950).
     old_trace_dispatch = pdb.Pdb.trace_dispatch
-    pdb.Pdb = TerminalPdb
-    pdb.Pdb.trace_dispatch = old_trace_dispatch
+    pdb.Pdb = TerminalPdb  # type: ignore
+    pdb.Pdb.trace_dispatch = old_trace_dispatch  # type: ignore
     pdb.main()

IPython/terminal/embed.py

@@ -1,399 +1,401 b''
 # encoding: utf-8
 """
 An embedded IPython shell.
 """
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 
 import sys
 import warnings
 
 from IPython.core import ultratb, compilerop
 from IPython.core import magic_arguments
 from IPython.core.magic import Magics, magics_class, line_magic
 from IPython.core.interactiveshell import DummyMod, InteractiveShell
 from IPython.terminal.interactiveshell import TerminalInteractiveShell
 from IPython.terminal.ipapp import load_default_config
 
 from traitlets import Bool, CBool, Unicode
 from IPython.utils.io import ask_yes_no
 
+from typing import Set
+
 class KillEmbedded(Exception):pass
 
 # kept for backward compatibility as IPython 6 was released with
 # the typo. See https://github.com/ipython/ipython/pull/10706
 KillEmbeded = KillEmbedded
 
 # This is an additional magic that is exposed in embedded shells.
 @magics_class
 class EmbeddedMagics(Magics):
 
     @line_magic
     @magic_arguments.magic_arguments()
     @magic_arguments.argument('-i', '--instance', action='store_true',
                               help='Kill instance instead of call location')
     @magic_arguments.argument('-x', '--exit', action='store_true',
                               help='Also exit the current session')
     @magic_arguments.argument('-y', '--yes', action='store_true',
                               help='Do not ask confirmation')
     def kill_embedded(self, parameter_s=''):
         """%kill_embedded : deactivate for good the current embedded IPython
 
         This function (after asking for confirmation) sets an internal flag so
         that an embedded IPython will never activate again for the given call
         location. This is useful to permanently disable a shell that is being
         called inside a loop: once you've figured out what you needed from it,
         you may then kill it and the program will then continue to run without
         the interactive shell interfering again.
 
 
         Kill Instance Option:
 
             If for some reasons you need to kill the location where the instance
             is created and not called, for example if you create a single
             instance in one place and debug in many locations, you can use the
             ``--instance`` option to kill this specific instance. Like for the
             ``call location`` killing an "instance" should work even if it is
             recreated within a loop.
 
         .. note::
 
             This was the default behavior before IPython 5.2
 
         """
 
         args = magic_arguments.parse_argstring(self.kill_embedded, parameter_s)
         print(args)
         if args.instance:
             # let no ask
             if not args.yes:
                 kill = ask_yes_no(
                     "Are you sure you want to kill this embedded instance? [y/N] ", 'n')
             else:
                 kill = True
             if kill:
                 self.shell._disable_init_location()
                 print("This embedded IPython instance will not reactivate anymore "
                       "once you exit.")
         else:
             if not args.yes:
                 kill = ask_yes_no(
                     "Are you sure you want to kill this embedded call_location? [y/N] ", 'n')
             else:
                 kill = True
             if kill:
                 self.shell.embedded_active = False
                 print("This embedded IPython  call location will not reactivate anymore "
                       "once you exit.")
 
         if args.exit:
             # Ask-exit does not really ask, it just set internals flags to exit
             # on next loop.
             self.shell.ask_exit()
 
 
     @line_magic
     def exit_raise(self, parameter_s=''):
         """%exit_raise Make the current embedded kernel exit and raise and exception.
 
         This function sets an internal flag so that an embedded IPython will
         raise a `IPython.terminal.embed.KillEmbedded` Exception on exit, and then exit the current I. This is
         useful to permanently exit a loop that create IPython embed instance.
         """
 
         self.shell.should_raise = True
         self.shell.ask_exit()
 
 
 
 class InteractiveShellEmbed(TerminalInteractiveShell):
 
     dummy_mode = Bool(False)
     exit_msg = Unicode('')
     embedded = CBool(True)
     should_raise = CBool(False)
     # Like the base class display_banner is not configurable, but here it
     # is True by default.
     display_banner = CBool(True)
     exit_msg = Unicode()
 
     # When embedding, by default we don't change the terminal title
     term_title = Bool(False,
         help="Automatically set the terminal title"
     ).tag(config=True)
 
-    _inactive_locations = set()
+    _inactive_locations: Set[str] = set()
+
+    def _disable_init_location(self):
+        """Disable the current Instance creation location"""
+        InteractiveShellEmbed._inactive_locations.add(self._init_location_id)
 
     @property
     def embedded_active(self):
         return (self._call_location_id not in InteractiveShellEmbed._inactive_locations)\
             and (self._init_location_id not in InteractiveShellEmbed._inactive_locations)
 
-    def _disable_init_location(self):
-        """Disable the current Instance creation location"""
-        InteractiveShellEmbed._inactive_locations.add(self._init_location_id)
-
     @embedded_active.setter
     def embedded_active(self, value):
         if value:
             InteractiveShellEmbed._inactive_locations.discard(
                 self._call_location_id)
             InteractiveShellEmbed._inactive_locations.discard(
                 self._init_location_id)
         else:
             InteractiveShellEmbed._inactive_locations.add(
                 self._call_location_id)
 
     def __init__(self, **kw):
         if kw.get('user_global_ns', None) is not None:
             raise DeprecationWarning(
                 "Key word argument `user_global_ns` has been replaced by `user_module` since IPython 4.0.")
 
         clid = kw.pop('_init_location_id', None)
         if not clid:
             frame = sys._getframe(1)
             clid = '%s:%s' % (frame.f_code.co_filename, frame.f_lineno)
         self._init_location_id = clid
 
         super(InteractiveShellEmbed,self).__init__(**kw)
 
         # don't use the ipython crash handler so that user exceptions aren't
         # trapped
         sys.excepthook = ultratb.FormattedTB(color_scheme=self.colors,
                                              mode=self.xmode,
                                              call_pdb=self.pdb)
 
     def init_sys_modules(self):
         """
         Explicitly overwrite :mod:`IPython.core.interactiveshell` to do nothing.
         """
         pass
 
     def init_magics(self):
         super(InteractiveShellEmbed, self).init_magics()
         self.register_magics(EmbeddedMagics)
 
     def __call__(self, header='', local_ns=None, module=None, dummy=None,
                  stack_depth=1, global_ns=None, compile_flags=None, **kw):
         """Activate the interactive interpreter.
 
         __call__(self,header='',local_ns=None,module=None,dummy=None) -> Start
         the interpreter shell with the given local and global namespaces, and
         optionally print a header string at startup.
 
         The shell can be globally activated/deactivated using the
         dummy_mode attribute. This allows you to turn off a shell used
         for debugging globally.
 
         However, *each* time you call the shell you can override the current
         state of dummy_mode with the optional keyword parameter 'dummy'. For
         example, if you set dummy mode on with IPShell.dummy_mode = True, you
         can still have a specific call work by making it as IPShell(dummy=False).
         """
 
         # we are called, set the underlying interactiveshell not to exit.
         self.keep_running = True
 
         # If the user has turned it off, go away
         clid = kw.pop('_call_location_id', None)
         if not clid:
             frame = sys._getframe(1)
             clid = '%s:%s' % (frame.f_code.co_filename, frame.f_lineno)
         self._call_location_id = clid
 
         if not self.embedded_active:
             return
 
         # Normal exits from interactive mode set this flag, so the shell can't
         # re-enter (it checks this variable at the start of interactive mode).
         self.exit_now = False
 
         # Allow the dummy parameter to override the global __dummy_mode
         if dummy or (dummy != 0 and self.dummy_mode):
             return
 
         # self.banner is auto computed
         if header:
             self.old_banner2 = self.banner2
             self.banner2 = self.banner2 + '\n' + header + '\n'
         else:
             self.old_banner2 = ''
 
         if self.display_banner:
             self.show_banner()
 
         # Call the embedding code with a stack depth of 1 so it can skip over
         # our call and get the original caller's namespaces.
         self.mainloop(local_ns, module, stack_depth=stack_depth,
                       global_ns=global_ns, compile_flags=compile_flags)
 
         self.banner2 = self.old_banner2
 
         if self.exit_msg is not None:
             print(self.exit_msg)
 
         if self.should_raise:
             raise KillEmbedded('Embedded IPython raising error, as user requested.')
 
 
     def mainloop(self, local_ns=None, module=None, stack_depth=0,
                  display_banner=None, global_ns=None, compile_flags=None):
         """Embeds IPython into a running python program.
 
         Parameters
         ----------
 
         local_ns, module
           Working local namespace (a dict) and module (a module or similar
           object). If given as None, they are automatically taken from the scope
           where the shell was called, so that program variables become visible.
 
         stack_depth : int
           How many levels in the stack to go to looking for namespaces (when
           local_ns or module is None). This allows an intermediate caller to
           make sure that this function gets the namespace from the intended
           level in the stack. By default (0) it will get its locals and globals
           from the immediate caller.
 
         compile_flags
           A bit field identifying the __future__ features
           that are enabled, as passed to the builtin :func:`compile` function.
           If given as None, they are automatically taken from the scope where
           the shell was called.
 
         """
         
         if (global_ns is not None) and (module is None):
             raise DeprecationWarning("'global_ns' keyword argument is deprecated, and has been removed in IPython 5.0 use `module` keyword argument instead.")
 
         if (display_banner is not None):
             warnings.warn("The display_banner parameter is deprecated since IPython 4.0", DeprecationWarning)
 
         # Get locals and globals from caller
         if ((local_ns is None or module is None or compile_flags is None)
             and self.default_user_namespaces):
             call_frame = sys._getframe(stack_depth).f_back
 
             if local_ns is None:
                 local_ns = call_frame.f_locals
             if module is None:
                 global_ns = call_frame.f_globals
                 try:
                     module = sys.modules[global_ns['__name__']]
                 except KeyError:
                     warnings.warn("Failed to get module %s" % \
                         global_ns.get('__name__', 'unknown module')
                     )
                     module = DummyMod()
                     module.__dict__ = global_ns
             if compile_flags is None:
                 compile_flags = (call_frame.f_code.co_flags &
                                  compilerop.PyCF_MASK)
         
         # Save original namespace and module so we can restore them after 
         # embedding; otherwise the shell doesn't shut down correctly.
         orig_user_module = self.user_module
         orig_user_ns = self.user_ns
         orig_compile_flags = self.compile.flags
         
         # Update namespaces and fire up interpreter
         
         # The global one is easy, we can just throw it in
         if module is not None:
             self.user_module = module
 
         # But the user/local one is tricky: ipython needs it to store internal
         # data, but we also need the locals. We'll throw our hidden variables
         # like _ih and get_ipython() into the local namespace, but delete them
         # later.
         if local_ns is not None:
             reentrant_local_ns = {k: v for (k, v) in local_ns.items() if k not in self.user_ns_hidden.keys()}
             self.user_ns = reentrant_local_ns
             self.init_user_ns()
 
         # Compiler flags
         if compile_flags is not None:
             self.compile.flags = compile_flags
 
         # make sure the tab-completer has the correct frame information, so it
         # actually completes using the frame's locals/globals
         self.set_completer_frame()
 
         with self.builtin_trap, self.display_trap:
             self.interact()
         
         # now, purge out the local namespace of IPython's hidden variables.
         if local_ns is not None:
             local_ns.update({k: v for (k, v) in self.user_ns.items() if k not in self.user_ns_hidden.keys()})
 
         
         # Restore original namespace so shell can shut down when we exit.
         self.user_module = orig_user_module
         self.user_ns = orig_user_ns
         self.compile.flags = orig_compile_flags
 
 
 def embed(**kwargs):
     """Call this to embed IPython at the current point in your program.
 
     The first invocation of this will create an :class:`InteractiveShellEmbed`
     instance and then call it.  Consecutive calls just call the already
     created instance.
 
     If you don't want the kernel to initialize the namespace
     from the scope of the surrounding function,
     and/or you want to load full IPython configuration,
     you probably want `IPython.start_ipython()` instead.
 
     Here is a simple example::
 
         from IPython import embed
         a = 10
         b = 20
         embed(header='First time')
         c = 30
         d = 40
         embed()
 
     Full customization can be done by passing a :class:`Config` in as the
     config argument.
     """
     config = kwargs.get('config')
     header = kwargs.pop('header', u'')
     compile_flags = kwargs.pop('compile_flags', None)
     if config is None:
         config = load_default_config()
         config.InteractiveShellEmbed = config.TerminalInteractiveShell
         kwargs['config'] = config
     using = kwargs.get('using', 'sync')
     if using :
         kwargs['config'].update({'TerminalInteractiveShell':{'loop_runner':using, 'colors':'NoColor', 'autoawait': using!='sync'}})
     #save ps1/ps2 if defined
     ps1 = None
     ps2 = None
     try:
         ps1 = sys.ps1
         ps2 = sys.ps2
     except AttributeError:
         pass
     #save previous instance
     saved_shell_instance = InteractiveShell._instance
     if saved_shell_instance is not None:
         cls = type(saved_shell_instance)
         cls.clear_instance()
     frame = sys._getframe(1)
     shell = InteractiveShellEmbed.instance(_init_location_id='%s:%s' % (
         frame.f_code.co_filename, frame.f_lineno), **kwargs)
     shell(header=header, stack_depth=2, compile_flags=compile_flags,
         _call_location_id='%s:%s' % (frame.f_code.co_filename, frame.f_lineno))
     InteractiveShellEmbed.clear_instance()
     #restore previous instance
     if saved_shell_instance is not None:
         cls = type(saved_shell_instance)
         cls.clear_instance()
         for subclass in cls._walk_mro():
             subclass._instance = saved_shell_instance
     if ps1 is not None:
         sys.ps1 = ps1
         sys.ps2 = ps2

IPython/terminal/pt_inputhooks/osx.py

@@ -1,157 +1,157 b''
 """Inputhook for OS X
 
 Calls NSApp / CoreFoundation APIs via ctypes.
 """
 
 # obj-c boilerplate from appnope, used under BSD 2-clause
 
 import ctypes
 import ctypes.util
 from threading import Event
 
-objc = ctypes.cdll.LoadLibrary(ctypes.util.find_library('objc'))
+objc = ctypes.cdll.LoadLibrary(ctypes.util.find_library("objc"))  # type: ignore
 
 void_p = ctypes.c_void_p
 
 objc.objc_getClass.restype = void_p
 objc.sel_registerName.restype = void_p
 objc.objc_msgSend.restype = void_p
 objc.objc_msgSend.argtypes = [void_p, void_p]
 
 msg = objc.objc_msgSend
 
 def _utf8(s):
     """ensure utf8 bytes"""
     if not isinstance(s, bytes):
         s = s.encode('utf8')
     return s
 
 def n(name):
     """create a selector name (for ObjC methods)"""
     return objc.sel_registerName(_utf8(name))
 
 def C(classname):
     """get an ObjC Class by name"""
     return objc.objc_getClass(_utf8(classname))
 
 # end obj-c boilerplate from appnope
 
 # CoreFoundation C-API calls we will use:
-CoreFoundation = ctypes.cdll.LoadLibrary(ctypes.util.find_library('CoreFoundation'))
+CoreFoundation = ctypes.cdll.LoadLibrary(ctypes.util.find_library("CoreFoundation"))  # type: ignore
 
 CFFileDescriptorCreate = CoreFoundation.CFFileDescriptorCreate
 CFFileDescriptorCreate.restype = void_p
 CFFileDescriptorCreate.argtypes = [void_p, ctypes.c_int, ctypes.c_bool, void_p, void_p]
 
 CFFileDescriptorGetNativeDescriptor = CoreFoundation.CFFileDescriptorGetNativeDescriptor
 CFFileDescriptorGetNativeDescriptor.restype = ctypes.c_int
 CFFileDescriptorGetNativeDescriptor.argtypes = [void_p]
 
 CFFileDescriptorEnableCallBacks = CoreFoundation.CFFileDescriptorEnableCallBacks
 CFFileDescriptorEnableCallBacks.restype = None
 CFFileDescriptorEnableCallBacks.argtypes = [void_p, ctypes.c_ulong]
 
 CFFileDescriptorCreateRunLoopSource = CoreFoundation.CFFileDescriptorCreateRunLoopSource
 CFFileDescriptorCreateRunLoopSource.restype = void_p
 CFFileDescriptorCreateRunLoopSource.argtypes = [void_p, void_p, void_p]
 
 CFRunLoopGetCurrent = CoreFoundation.CFRunLoopGetCurrent
 CFRunLoopGetCurrent.restype = void_p
 
 CFRunLoopAddSource = CoreFoundation.CFRunLoopAddSource
 CFRunLoopAddSource.restype = None
 CFRunLoopAddSource.argtypes = [void_p, void_p, void_p]
 
 CFRelease = CoreFoundation.CFRelease
 CFRelease.restype = None
 CFRelease.argtypes = [void_p]
 
 CFFileDescriptorInvalidate = CoreFoundation.CFFileDescriptorInvalidate
 CFFileDescriptorInvalidate.restype = None
 CFFileDescriptorInvalidate.argtypes = [void_p]
 
 # From CFFileDescriptor.h
 kCFFileDescriptorReadCallBack = 1
 kCFRunLoopCommonModes = void_p.in_dll(CoreFoundation, 'kCFRunLoopCommonModes')
 
 
 def _NSApp():
     """Return the global NSApplication instance (NSApp)"""
     objc.objc_msgSend.argtypes = [void_p, void_p]
     return msg(C('NSApplication'), n('sharedApplication'))
 
 
 def _wake(NSApp):
     """Wake the Application"""
     objc.objc_msgSend.argtypes = [
         void_p,
         void_p,
         void_p,
         void_p,
         void_p,
         void_p,
         void_p,
         void_p,
         void_p,
         void_p,
         void_p,
     ]
     event = msg(
         C("NSEvent"),
         n(
             "otherEventWithType:location:modifierFlags:"
             "timestamp:windowNumber:context:subtype:data1:data2:"
         ),
         15,  # Type
         0,  # location
         0,  # flags
         0,  # timestamp
         0,  # window
         None,  # context
         0,  # subtype
         0,  # data1
         0,  # data2
     )
     objc.objc_msgSend.argtypes = [void_p, void_p, void_p, void_p]
     msg(NSApp, n('postEvent:atStart:'), void_p(event), True)
 
 
 _triggered = Event()
 
 def _input_callback(fdref, flags, info):
     """Callback to fire when there's input to be read"""
     _triggered.set()
     CFFileDescriptorInvalidate(fdref)
     CFRelease(fdref)
     NSApp = _NSApp()
     objc.objc_msgSend.argtypes = [void_p, void_p, void_p]
     msg(NSApp, n('stop:'), NSApp)
     _wake(NSApp)
 
 _c_callback_func_type = ctypes.CFUNCTYPE(None, void_p, void_p, void_p)
 _c_input_callback = _c_callback_func_type(_input_callback)
 
 
 def _stop_on_read(fd):
     """Register callback to stop eventloop when there's data on fd"""
     _triggered.clear()
     fdref = CFFileDescriptorCreate(None, fd, False, _c_input_callback, None)
     CFFileDescriptorEnableCallBacks(fdref, kCFFileDescriptorReadCallBack)
     source = CFFileDescriptorCreateRunLoopSource(None, fdref, 0)
     loop = CFRunLoopGetCurrent()
     CFRunLoopAddSource(loop, source, kCFRunLoopCommonModes)
     CFRelease(source)
 
 
 def inputhook(context):
     """Inputhook for Cocoa (NSApp)"""
     NSApp = _NSApp()
     _stop_on_read(context.fileno())
     objc.objc_msgSend.argtypes = [void_p, void_p]
     msg(NSApp, n('run'))
     if not _triggered.is_set():
         # app closed without firing callback,
         # probably due to last window being closed.
         # Run the loop manually in this case,
         # since there may be events still to process (#9734)
         CoreFoundation.CFRunLoopRun()