MNT: re-enable jedi completion for environments that use newer IPython builds

docs/source/upcoming_release_notes/404-mnt_enable_jedi.rst

@@ -0,0 +1,23 @@
+404 mnt_enable_jedi
+###################
+
+API Changes
+-----------
+- N/A
+
+Features
+--------
+- N/A
+
+Bugfixes
+--------
+- Work around an issue where non-jedi completions were broken for pcdsdevices
+  in certain IPython ranges by re-enabling jedi completions in those ranges.
+
+Maintenance
+-----------
+- N/A
+
+Contributors
+------------
+- zllentz

hutch_python/cli.py

@@ -85,6 +85,14 @@ def configure_tab_completion(ipy_config):
     """
     Disable Jedi and tweak IPython tab completion.
 
+    At some IPython version this became no longer needed due to fixed performance issues
+    stemming from no longer by default executing properties.
+
+    At some IPython version this became counterproductive because the non-jedi
+    completer no longer works properly for us.
+
+    This change happend somewhere between 8.4.0 and 8.36.0
+
     Parameters
     ----------
     ipy_config : traitlets.config.Config
@@ -135,8 +143,11 @@ def configure_ipython_session(args: HutchPythonArgs):
 
     # Disable reformatting input with black
     ipy_config.TerminalInteractiveShell.autoformatter = None
-    # Set up tab completion modifications
-    configure_tab_completion(ipy_config)
+
+    if IPython.version_info[:3] <= (8, 4, 0):
+        # Set up tab completion modifications
+        # The last IPython version we deployed that needed this is 8.4.0
+        configure_tab_completion(ipy_config)
 
     # disable default banner
     ipy_config.TerminalIPythonApp.display_banner = False

hutch_python/tests/test_cli.py

@@ -156,6 +156,7 @@ def test_run_script():
             main()
 
 
+@pytest.mark.skipif(IPython.version_info[:3] > (8, 4, 0), reason="IPython completer API too unstable to test against")
 def test_ipython_tab_completion():
     class MyTest:
         THIS_SHOULD_NOT_BE_THERE = None