Incomplete tracebacks for ExceptionGroup

[jacobj45]

Description

Tracebacks for ExceptionGroups are incomplete and different from when these exceptions are raised within a script.

Reproduce

1. Run the following in a Jupyter cell:

eg = ExceptionGroup(
    "one",
    [
        ValueError(111),
        TypeError(333),
    ],
)
raise eg

Observed behavior

Full traceback is not present when running the above snippet from JupyterLab:

. . .
----> 8 raise eg

ExceptionGroup: one (2 sub-exceptions)

Expected behavior

You get the expected behaviour when running the same snippet from a Python script:

. . .
|     raise eg
  | ExceptionGroup: one (2 sub-exceptions)
  +-+---------------- 1 ----------------
    | ValueError: 111
    +---------------- 2 ----------------
    | TypeError: 333
    +------------------------------------

Context

• JupyterLab version: 4.0.5
• Python version: 3.11.4

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[krassowski]

The tracebacks are generated by the kernel, in this case probably ipykernel/IPython. There was an issue about this in IPython (ipython/ipython#13753) which was fixed but not yet released. You can try installing the latest development version of IPython if you like, but I believe this is not an issue in JupyterLab.

[JasonWeill]

@jacobj45 Thank you for your contribution! I'm resolving this in favor of the IPython issue that @krassowski mentioned.