fixup! DEP: bump minimal supported IPython version to 7.32, declare i…

…pykernel as optional dep, cleanup

astropy/utils/compat/optional_deps.py

@@ -21,6 +21,7 @@
     "html5lib",
     "ipykernel",
     "IPython",
+    "ipywidgets",
     "jplephem",
     "lxml",
     "matplotlib",

astropy/utils/console.py

@@ -27,7 +27,11 @@
     _CAN_RESIZE_TERMINAL = False
 
 from astropy import conf
-from astropy.utils.compat.optional_deps import HAS_IPYKERNEL, HAS_IPYTHON
+from astropy.utils.compat.optional_deps import (
+    HAS_IPYKERNEL,
+    HAS_IPYTHON,
+    HAS_IPYWIDGETS,
+)
 
 from .decorators import classproperty, deprecated
 from .misc import isiterable
@@ -48,14 +52,6 @@
 class _IPython:
     """Singleton class given access to IPython streams, etc."""
 
-    @classproperty
-    def get_ipython(cls):
-        if HAS_IPYTHON:
-            from IPython import get_ipython
-
-            return get_ipython
-        raise ModuleNotFoundError("IPython is not installed")
-
     @classproperty
     def OutStream(cls):
         if not hasattr(cls, "_OutStream"):
@@ -559,9 +555,12 @@ def _update_ipython_widget(self, value=None):
         """
         # Create and display an empty progress bar widget,
         # if none exists.
+
         if not hasattr(self, "_widget"):
             # Import only if an IPython widget, i.e., widget in iPython NB
-            _IPython.get_ipython()
+            if not HAS_IPYWIDGETS:
+                raise ModuleNotFoundError("ipywidgets is not installed")
+
             from ipywidgets import widgets
 
             self._widget = widgets.FloatProgress()

pyproject.toml

@@ -60,6 +60,7 @@ test_all = [
     "objgraph",
     "ipykernel",
     "ipython>=7.32",
+    "ipywidgets",
     "coverage[toml]",
     "skyfield>=1.20",
     "sgp4>=2.3",
@@ -91,6 +92,7 @@ all = [
     "bottleneck",
     "ipykernel",
     "ipython>=7.32",
+    "ipywidgets",
     "pytest>=7.0",
     "fsspec[http]>=2023.4.0",
     "s3fs>=2023.4.0",