improve rendering for stack traces produced by jupyter

[amunger]

create a new untitled text file and paste the contents below
save the file as an .ipynb, then reopen with the notebook editor

🐛 ugly highlighting

file contents:

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "4ffd48ad",
   "metadata": {},
   "outputs": [],
   "source": [
    "def myfunc():\n",
    "    print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "4e5233d0",
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'x' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "Cell \u001b[1;32mIn[2], line 1\u001b[0m\n\u001b[1;32m----> 1\u001b[0m \u001b[43mmyfunc\u001b[49m\u001b[43m(\u001b[49m\u001b[43m)\u001b[49m\n",
      "Cell \u001b[1;32mIn[1], line 2\u001b[0m, in \u001b[0;36mmyfunc\u001b[1;34m()\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[38;5;28;01mdef\u001b[39;00m \u001b[38;5;21mmyfunc\u001b[39m():\n\u001b[1;32m----> 2\u001b[0m     \u001b[38;5;28mprint\u001b[39m(\u001b[43mx\u001b[49m)\n",
      "\u001b[1;31mNameError\u001b[0m: name 'x' is not defined"
     ]
    }
   ],
   "source": [
    "myfunc()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "9e909fcf",
   "metadata": {},
   "outputs": [
    {
     "ename": "Exception",
     "evalue": "",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mException\u001b[0m                                 Traceback (most recent call last)",
      "Cell \u001b[1;32mIn[3], line 2\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[38;5;28;01mimport\u001b[39;00m \u001b[38;5;21;01mmyLib\u001b[39;00m\n\u001b[1;32m----> 2\u001b[0m \u001b[43mmyLib\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mthrowEx\u001b[49m\u001b[43m(\u001b[49m\u001b[43m)\u001b[49m\n",
      "File \u001b[1;32mC:\\venvs\\myLib.py:2\u001b[0m, in \u001b[0;36mthrowEx\u001b[1;34m()\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[38;5;28;01mdef\u001b[39;00m \u001b[38;5;21mthrowEx\u001b[39m():\n\u001b[1;32m----> 2\u001b[0m     \u001b[38;5;28;01mraise\u001b[39;00m \u001b[38;5;167;01mException\u001b[39;00m\n",
      "\u001b[1;31mException\u001b[0m: "
     ]
    }
   ],
   "source": [
    "import myLib\n",
    "myLib.throwEx()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "3a49607b",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3 (ipykernel)",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.9.13"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}

[amunger]

alternative verification steps:

1. use the undocumented jupyter setting to disable formatting in the extension "jupyter.formatStackTraces": false
2. run a notebook cell with an error.
   No ugly highlighting, links are rendered for stack frames