Formatting

IPython/terminal/pt_inputhooks/__init__.py

@@ -1,147 +1,147 b''
 import importlib
 import os
 
 aliases = {
     'qt4': 'qt',
     'gtk2': 'gtk',
 }
 
 backends = [
     "qt",
     "qt4",
     "qt5",
     "qt6",
     "gtk",
     "gtk2",
     "gtk3",
     "gtk4",
     "tk",
     "wx",
     "pyglet",
     "glut",
     "osx",
     "asyncio",
 ]
 
 registered = {}
 
 def register(name, inputhook):
     """Register the function *inputhook* as an event loop integration."""
     registered[name] = inputhook
 
 
 class UnknownBackend(KeyError):
     def __init__(self, name):
         self.name = name
 
     def __str__(self):
         return ("No event loop integration for {!r}. "
                 "Supported event loops are: {}").format(self.name,
                                     ', '.join(backends + sorted(registered)))
 
 
 def set_qt_api(gui):
     """Sets the `QT_API` environment variable if it isn't already set."""
 
     qt_api = os.environ.get("QT_API", None)
 
     from IPython.external.qt_loaders import (
         QT_API_PYQT,
         QT_API_PYQT5,
         QT_API_PYQT6,
         QT_API_PYSIDE,
         QT_API_PYSIDE2,
         QT_API_PYSIDE6,
         QT_API_PYQTv1,
         loaded_api,
     )
 
     loaded = loaded_api()
 
     qt_env2gui = {
-        QT_API_PYSIDE: 'qt4',
-        QT_API_PYQTv1: 'qt4',
-        QT_API_PYQT: 'qt4',
-        QT_API_PYSIDE2: 'qt5',
-        QT_API_PYQT5: 'qt5',
-        QT_API_PYSIDE6: 'qt6',
-        QT_API_PYQT6: 'qt6',
+        QT_API_PYSIDE: "qt4",
+        QT_API_PYQTv1: "qt4",
+        QT_API_PYQT: "qt4",
+        QT_API_PYSIDE2: "qt5",
+        QT_API_PYQT5: "qt5",
+        QT_API_PYSIDE6: "qt6",
+        QT_API_PYQT6: "qt6",
     }
-    if loaded is not None and gui != 'qt':
+    if loaded is not None and gui != "qt":
         if qt_env2gui[loaded] != gui:
             raise ImportError(
-                f'Cannot switch Qt versions for this session; must use {qt_env2gui[loaded]}.'
+                f"Cannot switch Qt versions for this session; must use {qt_env2gui[loaded]}."
             )
 
-    if qt_api is not None and gui != 'qt':
+    if qt_api is not None and gui != "qt":
         if qt_env2gui[qt_api] != gui:
             print(
                 f'Request for "{gui}" will be ignored because `QT_API` '
                 f'environment variable is set to "{qt_api}"'
             )
     else:
         # NOTE: 'qt4' is not selectable because it's set as an alias for 'qt'; see `aliases` above.
         if gui == "qt4":
             try:
                 import PyQt  # noqa
 
                 os.environ["QT_API"] = "pyqt"
             except ImportError:
                 try:
                     import PySide  # noqa
 
                     os.environ["QT_API"] = "pyside"
                 except ImportError:
                     # Neither implementation installed; set it to something so IPython gives an error
                     os.environ["QT_API"] = "pyqt"
         elif gui == "qt5":
             try:
                 import PyQt5  # noqa
 
                 os.environ["QT_API"] = "pyqt5"
             except ImportError:
                 try:
                     import PySide2  # noqa
 
                     os.environ["QT_API"] = "pyside2"
                 except ImportError:
                     os.environ["QT_API"] = "pyqt5"
         elif gui == "qt6":
             try:
                 import PyQt6  # noqa
 
                 os.environ["QT_API"] = "pyqt6"
             except ImportError:
                 try:
                     import PySide6  # noqa
 
                     os.environ["QT_API"] = "pyside6"
                 except ImportError:
                     os.environ["QT_API"] = "pyqt6"
         elif gui == "qt":
             # Don't set QT_API; let IPython logic choose the version.
             if "QT_API" in os.environ.keys():
                 del os.environ["QT_API"]
         else:
             raise ValueError(
                 f'Unrecognized Qt version: {gui}. Should be "qt4", "qt5", "qt6", or "qt".'
             )
 
 
 def get_inputhook_name_and_func(gui):
     if gui in registered:
         return gui, registered[gui]
 
     if gui not in backends:
         raise UnknownBackend(gui)
 
     if gui in aliases:
         return get_inputhook_name_and_func(aliases[gui])
 
     gui_mod = gui
     if gui.startswith("qt"):
         set_qt_api(gui)
         gui_mod = "qt"
 
     mod = importlib.import_module("IPython.terminal.pt_inputhooks." + gui_mod)
     return gui, mod.inputhook

IPython/terminal/tests/test_pt_inputhooks.py

@@ -1,48 +1,50 b''
 import os
 import importlib
 
 import pytest
 
 from IPython.terminal.pt_inputhooks import set_qt_api, get_inputhook_name_and_func
 
 
 guis_avail = []
 
 
 def _get_qt_vers():
     """If any version of Qt is available, this will populate `guis_avail` with 'qt' and 'qtx'. Due
     to the import mechanism, we can't import multiple versions of Qt in one session."""
-    for gui in ['qt', 'qt6', 'qt5', 'qt4']:
-        print(f'Trying {gui}')
+    for gui in ["qt", "qt6", "qt5", "qt4"]:
+        print(f"Trying {gui}")
         try:
             set_qt_api(gui)
             importlib.import_module("IPython.terminal.pt_inputhooks.qt")
             guis_avail.append(gui)
-            if 'QT_API' in os.environ.keys():
-                del os.environ['QT_API']
+            if "QT_API" in os.environ.keys():
+                del os.environ["QT_API"]
         except ImportError:
             pass  # that version of Qt isn't available.
         except RuntimeError:
             pass  # the version of IPython doesn't know what to do with this Qt version.
 
 
 _get_qt_vers()
 
 
[e-mail](len(guis_avail) == 0, reason='No viable version of PyQt or PySide installed.')
[e-mail](
+    len(guis_avail) == 0, reason="No viable version of PyQt or PySide installed."
+)
 def test_inputhook_qt():
     gui = guis_avail[0]
 
     # Choose a qt version and get the input hook function. This will import Qt...
     get_inputhook_name_and_func(gui)
 
     # ...and now we're stuck with this version of Qt for good; can't switch.
-    for not_gui in ['qt6', 'qt5', 'qt4']:
+    for not_gui in ["qt6", "qt5", "qt4"]:
         if not_gui not in guis_avail:
             break
 
     with pytest.raises(ImportError):
         get_inputhook_name_and_func(not_gui)
 
     # A gui of 'qt' means "best available", or in this case, the last one that was used.
-    get_inputhook_name_and_func('qt')
+    get_inputhook_name_and_func("qt")