In relation to [this Jupyter Discourse post](https://discourse.jupyter.org/t/how-to-execute-notebook-in-different-namespace/33532?u=fomightez)

nba.ipynb

nbb.ipynb

nbc.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "59fa37ab-7322-4689-b080-383811455164",
   "metadata": {},
   "source": [
    "This is in relation to [this Jupyter Discourse post](https://discourse.jupyter.org/t/how-to-execute-notebook-in-different-namespace/33532?u=fomightez)\n",
    "\n",
    "-----"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "0e5a96ef-c345-4a8d-88d4-bae54ff368dc",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Requirement already satisfied: jupytext in /srv/conda/envs/notebook/lib/python3.10/site-packages (1.16.7)\n",
      "Requirement already satisfied: markdown-it-py>=1.0 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jupytext) (3.0.0)\n",
      "Requirement already satisfied: mdit-py-plugins in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jupytext) (0.4.2)\n",
      "Requirement already satisfied: nbformat in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jupytext) (5.10.4)\n",
      "Requirement already satisfied: packaging in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jupytext) (24.2)\n",
      "Requirement already satisfied: pyyaml in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jupytext) (6.0.2)\n",
      "Requirement already satisfied: tomli in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jupytext) (2.2.1)\n",
      "Requirement already satisfied: mdurl~=0.1 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from markdown-it-py>=1.0->jupytext) (0.1.2)\n",
      "Requirement already satisfied: fastjsonschema>=2.15 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from nbformat->jupytext) (2.21.1)\n",
      "Requirement already satisfied: jsonschema>=2.6 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from nbformat->jupytext) (4.23.0)\n",
      "Requirement already satisfied: jupyter-core!=5.0.*,>=4.12 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from nbformat->jupytext) (5.7.2)\n",
      "Requirement already satisfied: traitlets>=5.1 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from nbformat->jupytext) (5.14.3)\n",
      "Requirement already satisfied: attrs>=22.2.0 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jsonschema>=2.6->nbformat->jupytext) (25.1.0)\n",
      "Requirement already satisfied: jsonschema-specifications>=2023.03.6 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jsonschema>=2.6->nbformat->jupytext) (2024.10.1)\n",
      "Requirement already satisfied: referencing>=0.28.4 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jsonschema>=2.6->nbformat->jupytext) (0.36.2)\n",
      "Requirement already satisfied: rpds-py>=0.7.1 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jsonschema>=2.6->nbformat->jupytext) (0.22.3)\n",
      "Requirement already satisfied: platformdirs>=2.5 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from jupyter-core!=5.0.*,>=4.12->nbformat->jupytext) (4.3.6)\n",
      "Requirement already satisfied: typing-extensions>=4.4.0 in /srv/conda/envs/notebook/lib/python3.10/site-packages (from referencing>=0.28.4->jsonschema>=2.6->nbformat->jupytext) (4.12.2)\n",
      "Note: you may need to restart the kernel to use updated packages.\n"
     ]
    }
   ],
   "source": [
    "%pip install jupytext"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "62d7330d-7fa7-4ced-8b64-9d456beed87b",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "y=100\n",
      "Stored 'y' (int)\n"
     ]
    }
   ],
   "source": [
    "x = 2\n",
    "\n",
    "y = 100\n",
    "print(f\"{y=}\")\n",
    "%store y"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "7e12ac02-e53e-4dd9-9612-81128b76e1e1",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[jupytext] Reading nbb.ipynb in format ipynb\n",
      "[jupytext] Executing notebook with kernel python3\n",
      "[jupytext] Writing nbb.ipynb\n"
     ]
    }
   ],
   "source": [
    "!jupytext --execute nbb.ipynb"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "ef31ffcf-4324-43da-be94-6b9ecfa14556",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "y=100\n"
     ]
    }
   ],
   "source": [
    "print(f\"{y=}\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "a75ae166-2cae-4784-921b-11da516aabea",
   "metadata": {},
   "source": [
    "`y` in this namespace is still as it was before `nbb.ipynb` was run.\n",
    "And if we look at the contents of nbb.ipynb, we can see it was run."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "fd4d3230-ff5e-4c9b-901e-b1eca368d8be",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "y=100\n",
      "\n",
      "y=150\n",
      "\n"
     ]
    }
   ],
   "source": [
    "# Show output generated by running `nbb.ipynb` here.\n",
    "import nbformat as nbf\n",
    "ntbk = nbf.read(\"nbb.ipynb\", nbf.NO_CONVERT)\n",
    "text_collected = \"\"\n",
    "for cell in ntbk.cells:\n",
    "    if cell.cell_type == 'code':\n",
    "        if cell.outputs:\n",
    "            print(cell.outputs[0]['text'])"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "fd97f49e-28f4-404a-85d4-8ae0da7d3d9e",
   "metadata": {},
   "source": [
    "But what if the point trying `%run nbb.ipynb` was to see the result of that notebook here without any fancy use of python code /`nbformat`?\n",
    "\n",
    "Jupytext can be used to make the notebook a script and then the code can be run with `!python`, or possibly `%run -p` but [that has not been my experience](https://stackoverflow.com/a/68023750/8508004).  \n",
    "Illustrating that:"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "5d67a553-3ac6-4dec-879f-286b0d6e1a40",
   "metadata": {},
   "source": [
    "Convert nbb.ipynb to a script using Jupytext."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "2681dd61-a851-4743-b99c-5dc8a0a1112d",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[jupytext] Reading nbb.ipynb in format ipynb\n",
      "[jupytext] Writing nbb.py\n"
     ]
    }
   ],
   "source": [
    "!jupytext --to py nbb.ipynb"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "5ff4c9a9-0fc8-4c42-8038-2a52a9ed1032",
   "metadata": {},
   "source": [
    "Since it has IPython conveniences though we want it as `.ipy`.   \n",
    "Jupytext doesn't recognize IPython though when making Python code, and so it comments it out and we need to fix that, too"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "9697cb67-0334-4bf2-9cde-42040303470d",
   "metadata": {},
   "outputs": [],
   "source": [
    "!mv nbb.py nbb.ipy\n",
    "import os\n",
    "ipython_file = \"nbb.ipy\"\n",
    "with open(ipython_file, 'r') as thefile:\n",
    "    script=thefile.read()\n",
    "fixed_script = script.replace(\"# %\",\"%\")\n",
    "with open(ipython_file, 'w') as output_file:\n",
    "        output_file.write(fixed_script)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "fcd514f2-e930-4a02-844d-a16ba94b2e87",
   "metadata": {},
   "source": [
    "Obviously this preparation could all be done in one cell, but I broke it up to make annotate the steps better.  \n",
    "Also keep in mind we would have been done with `!jupytext --to py nbb.ipynb` if the code in the notebook had been pure Python.  \n",
    "\n",
    "With that preparation complete..."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "a96ee49b-6c86-4e4c-a971-65cff9ac4336",
   "metadata": {},
   "source": [
    "Now run the script in a separate namespace where won't pass back the settings."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "e0454c3b-2be6-4453-9b83-f631bc0792e6",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\u001b[?12l\u001b[?25h\u001b[22;0t\u001b]0;IPython: jovyan/notebooks\u0007y=100\n",
      "y=150\n",
      "\u001b[23;0t"
     ]
    }
   ],
   "source": [
    "!ipython nbb.ipy"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "38506078-d7d9-4116-8991-e104dda3848b",
   "metadata": {},
   "source": [
    "That doesn't look great, but the results are visible."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "7aca7f9b-77d4-4f36-8b9c-4085253bdcf7",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Seems like below should work in theory but DOES NOT BECAUSE IT ADJUSTS `y` in this namespace, too, see https://stackoverflow.com/a/68023750/8508004\n",
    "#%run -p nbb.ipy"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "6e6d84d6-4592-462f-afed-6a84217965bc",
   "metadata": {},
   "source": [
    "Check `y` here in this notebook's namespace is still intact."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "7da0b88c-f677-4e79-b505-c5f56cab5d47",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "y=100\n"
     ]
    }
   ],
   "source": [
    "print(f\"{y=}\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "04f665d0-310e-4a80-b9fe-dd69758cbb5b",
   "metadata": {},
   "source": [
    "`y` value here didn't get changed when nbb code run."
   ]
  }
 ],
 "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": "3.10.16"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}