Re-add lessons/*.ipynb notebooks

.gitignore

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-lessons/*.ipynb
 .tool-versions

lessons/00 index.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "id": "RQ73d6XVysi7"
+   },
+   "source": [
+    "# CDH course \"Programming in Python\"\n",
+    "\n",
+    "**April 2023 edition**\n",
+    "\n",
+    "[Teams channel](https://teams.microsoft.com/l/channel/19%3aAlr7pcE2v9p1eaKT1BtNxJAB9mgCFT1olZvAMswJlEc1%40thread.tacv2/Algemeen?groupId=7fd15384-6748-4852-8646-d96963fb3524&tenantId=d72758a0-a446-4e0f-a0aa-4bf95a4a10e7)\n",
+    "\n",
+    "## Course modules\n",
+    "\n",
+    "1. [Introduction](https://colab.research.google.com/drive/1i4wJpUIr77Fh1renWNjt00Bd51NbC1nB)\n",
+    "2. [Values and expressions](https://colab.research.google.com/drive/17K6C_EZoeGtRxoTbYQvygFEdpWgQ2QFp)\n",
+    "3. [Conditionals](https://colab.research.google.com/drive/1KkZ2fS75o7giccQJakRhyvYBV7JdFnVw)\n",
+    "4. [Datastructures](https://colab.research.google.com/drive/1JxzmIzwcipnwFBntv0WZOlT-d2fUjoRF)\n",
+    "5. [Assertions](https://colab.research.google.com/drive/1Nv6vgkH2zjJes7LXUCVhsDwFOGCtTbHM)\n",
+    "6. [Loops](https://colab.research.google.com/drive/1AZY4ESmsKKMvbalBDLlMrezAM5NzXXxV)\n",
+    "7. [Functions](https://colab.research.google.com/drive/1APhegD_KpLRFn5bC6Ater2wFpT8_Opfr) \n",
+    "8. [Debugging](https://colab.research.google.com/drive/1yQskT6SyKvXtXewx5kCla2NOmasgP8Vi)\n",
+    "9. [String manipulation](https://colab.research.google.com/drive/1Z7NNMxqHTSMoUadH3pVL6Bg6oii4qUoQ)\n",
+    "10. [Dictionaries](https://colab.research.google.com/drive/16mecEPkVGUBIFoHIALO7dE8qv7PynHL9)\n",
+    "11. [Working with files](https://colab.research.google.com/drive/17G-gA5-GNKX-mQglrPVNtndV2YhBafBr)\n",
+    "\n",
+    "## Extra material\n",
+    "\n",
+    "- [Functions exercises](https://colab.research.google.com/drive/13__hh18xcBeZ5xjeby21KXUBYjRpb_Vy)\n",
+    "- [Tips](https://colab.research.google.com/drive/1qKVaI3Ct1hOsM_06mZdXpx0sLSR_O-6R)\n",
+    "\n",
+    "## Projects\n",
+    "- [Text analysis](https://colab.research.google.com/drive/1wUgaVE70dzjIlIEuZtgQalqYI2UcfiXK)\n",
+    "\n",
+    "## Exercise solutions\n",
+    "\n",
+    "1. [Introduction](https://colab.research.google.com/drive/1RIwG7hA-Ymjcm1dmSW6wA_hu1clDNrAd)\n",
+    "2. [Values and expressions](https://colab.research.google.com/drive/1JKeNehBZ9hhHXPdVunQ_r9cv-lLR9Byy)\n",
+    "3. [Conditionals](https://colab.research.google.com/drive/1Nvvjc3fGnMg2tWvfw2W1gVn2oKKbWzGI)\n",
+    "4. [Datastructures](https://colab.research.google.com/drive/1juOQFMlRmeVUfbKWy0wtZ9lWkSZmr2Gn)\n",
+    "5. [Assertions](https://colab.research.google.com/drive/1tqjXsHnnJeEAivrxqRoOSW9eNESCwLIK)\n",
+    "6. [Loops](https://colab.research.google.com/drive/1vy2gKHtBUMk60u2bmCYlcqmhIFpI2PI-)\n",
+    "7. [Functions](https://colab.research.google.com/drive/13M4t34msJvudQTN-Im24w4iRfctOuNCv)\n",
+    "8. Debugging - no solutions\n",
+    "9. [String manipulation](https://colab.research.google.com/drive/1Z7NNMxqHTSMoUadH3pVL6Bg6oii4qUoQ)\n",
+    "10. [Dictionaries](https://colab.research.google.com/drive/1Qw7vgiyRVg1E-BkUEvCxX0e6QZQ9y_k6)\n",
+    "11. [Working with files](https://colab.research.google.com/drive/1Nz3lhsntgw4yAI6257drrp-EtEQEVogF)"
+   ]
+  }
+ ],
+ "metadata": {
+  "colab": {
+   "provenance": []
+  },
+  "jupytext": {
+   "main_language": "python"
+  },
+  "kernelspec": {
+   "display_name": "Python 3",
+   "name": "python3"
+  },
+  "language_info": {
+   "name": "python"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}