matplotlib
diff --git a/‎lib/matplotlib/__init__.py
Lines changed: 6 additions & 2 deletions b/‎lib/matplotlib/__init__.py
Lines changed: 6 additions & 2 deletions
diff --git a/‎lib/matplotlib/backend_bases.py
Lines changed: 7 additions & 3 deletions b/‎lib/matplotlib/backend_bases.py
Lines changed: 7 additions & 3 deletions
@@ -1208,14 +1208,18 @@ def use(backend, *, force=True):
         backend names, which are case-insensitive:
 
         - interactive backends:
-          GTK3Agg, GTK3Cairo, GTK4Agg, GTK4Cairo, MacOSX, nbAgg, QtAgg,
-          QtCairo, TkAgg, TkCairo, WebAgg, WX, WXAgg, WXCairo, Qt5Agg, Qt5Cairo
+          GTK3Agg, GTK3Cairo, GTK4Agg, GTK4Cairo, MacOSX, nbAgg, notebook, QtAgg,
+          QtCairo, TkAgg, TkCairo, WebAgg, WX, WXAgg, WXCairo, Qt5Agg, Qt5Cairo,
+          Qt6Agg, Qt6Cairo
 
         - non-interactive backends:
           agg, cairo, pdf, pgf, ps, svg, template
 
         or a string of the form: ``module://my.module.name``.
 
+        notebook is a synonym for nbAgg, Qt6Agg for QtAgg, and Qt6Cairo for
+        QtCairo.
+
         Switching to an interactive backend is not possible if an unrelated
         event loop has already been started (e.g., switching to GTK3Agg if a
         TkAgg window has already been opened).  Switching to a non-interactive
 
@@ -1766,8 +1766,12 @@ def _fix_ipython_backend2gui(cls):
         # `ipython --auto`).  This cannot be done at import time due to
         # ordering issues, so we do it when creating a canvas, and should only
         # be done once per class (hence the `cache`).
-        if sys.modules.get("IPython") is None:
+        mod_ipython = sys.modules.get("IPython")
+        if mod_ipython is None or mod_ipython.version_info[:2] >= (8, 23):
+            # Use of backend2gui is not needed for IPython >= 8.23 as the
+            # functionality has been moved to Matplotlib.
             return
+
         import IPython
         ip = IPython.get_ipython()
         if not ip:
@@ -2030,9 +2034,9 @@ def _switch_canvas_and_return_print_method(self, fmt, backend=None):
         canvas = None
         if backend is not None:
             # Return a specific canvas class, if requested.
+            from .backends.registry import backend_registry
             canvas_class = (
-                importlib.import_module(cbook._backend_module_name(backend))
-                .FigureCanvas)
+                backend_registry.load_backend_module(backend).FigureCanvas)
             if not hasattr(canvas_class, f"print_{fmt}"):
                 raise ValueError(
                     f"The {backend!r} backend does not support {fmt} output")