Fix use of "%matplotlib osx" (#1237)

ipykernel/_eventloop_macos.py

@@ -17,7 +17,6 @@
 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
 
@@ -80,11 +79,25 @@ def C(classname):
 
 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(
@@ -101,6 +114,7 @@ def _wake(NSApp):
  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)
 
 
@@ -113,7 +127,9 @@ def stop(timer=None, loop=None):
  NSApp = _NSApp()
  # if NSApp is not running, stop CFRunLoop directly,
  # otherwise stop and wake NSApp
+ objc.objc_msgSend.argtypes = [void_p, void_p]
  if msg(NSApp, n("isRunning")):
+ objc.objc_msgSend.argtypes = [void_p, void_p, void_p]
  msg(NSApp, n("stop:"), NSApp)
  _wake(NSApp)
  else:
@@ -148,6 +164,7 @@ def mainloop(duration=1):
  _triggered.clear()
  NSApp = _NSApp()
  _stop_after(duration)
+ objc.objc_msgSend.argtypes = [void_p, void_p]
  msg(NSApp, n("run"))
  if not _triggered.is_set():
  # app closed without firing callback,