reformat

IPython/core/pylabtools.py

@@ -43,11 +43,11 b' backend2gui = dict(zip(backends.values(), backends.keys()))'
 backend2gui['Qt4Agg'] = 'qt'
 # In the reverse mapping, there are a few extra valid matplotlib backends that
 # map to the same GUI support
-backend2gui['GTK'] = backend2gui['GTKCairo'] = 'gtk'
-backend2gui['GTK3Cairo'] = 'gtk3'
-backend2gui['GTK4Cairo'] = 'gtk4'
-backend2gui['WX'] = 'wx'
-backend2gui['CocoaAgg'] = 'osx'
+backend2gui["GTK"] = backend2gui["GTKCairo"] = "gtk"
+backend2gui["GTK3Cairo"] = "gtk3"
+backend2gui["GTK4Cairo"] = "gtk4"
+backend2gui["WX"] = "wx"
+backend2gui["CocoaAgg"] = "osx"
 # And some backends that don't need GUI integration
 del backend2gui["nbAgg"]
 del backend2gui["agg"]

IPython/lib/inputhookgtk4.py

@@ -1,25 +1,26 b''
 """
 Enable Gtk4 to be used interactively by IPython.
 """
-#-----------------------------------------------------------------------------
+# -----------------------------------------------------------------------------
 # Copyright (c) 2021, the IPython Development Team.
 #
 # Distributed under the terms of the Modified BSD License.
 #
 # The full license is in the file COPYING.txt, distributed with this software.
-#-----------------------------------------------------------------------------
+# -----------------------------------------------------------------------------
 
-#-----------------------------------------------------------------------------
+# -----------------------------------------------------------------------------
 # Imports
-#-----------------------------------------------------------------------------
+# -----------------------------------------------------------------------------
 
 import sys
 
 from gi.repository import GLib
 
-#-----------------------------------------------------------------------------
+# -----------------------------------------------------------------------------
 # Code
-#-----------------------------------------------------------------------------
+# -----------------------------------------------------------------------------
+
 
 class _InputHook:
     def __init__(self, context):

IPython/terminal/pt_inputhooks/gtk4.py

@@ -8,7 +8,9 b' from gi.repository import GLib'
 class _InputHook:
     def __init__(self, context):
         self._quit = False
-        GLib.io_add_watch(context.fileno(), GLib.PRIORITY_DEFAULT, GLib.IO_IN, self.quit)
+        GLib.io_add_watch(
+            context.fileno(), GLib.PRIORITY_DEFAULT, GLib.IO_IN, self.quit
+        )
 
     def quit(self, *args, **kwargs):
         self._quit = True

examples/IPython Kernel/gui/gui-gtk4.py

@@ -9,7 +9,8 b' In [2]: %run gui-gtk4.py'
 """
 
 import gi
-gi.require_version('Gtk', '4.0')
+
+gi.require_version("Gtk", "4.0")
 from gi.repository import Gtk, GLib  # noqa