{
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  {
   "cell_type": "markdown",
   "id": "9917ce10",
   "metadata": {},
   "source": [
    "# Datenserialisierung\n",
    "\n",
    "Wenn die Daten flach serialisiert werden sollen, bietet Python zwei Funktionen an:"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "fb85bcd4",
   "metadata": {},
   "source": [
    "## `repr`\n",
    "\n",
    "[repr()](https://docs.python.org/3/library/functions.html#repr) gibt eine druckbare Repräsentation der Eingabe aus, z.B.:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "c29d4fff",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-05-22T08:23:45.765407Z",
     "iopub.status.busy": "2026-05-22T08:23:45.765231Z",
     "iopub.status.idle": "2026-05-22T08:23:45.769908Z",
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     "shell.execute_reply.started": "2026-05-22T08:23:45.765384Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'id': 'veit', 'first_name': 'Veit', 'last_name': 'Schiele'}\n"
     ]
    }
   ],
   "source": [
    "data = {\"id\": \"veit\", \"first_name\": \"Veit\", \"last_name\": \"Schiele\"}\n",
    "\n",
    "print(repr(data))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "73d1b74f",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-05-22T08:23:45.770820Z",
     "iopub.status.busy": "2026-05-22T08:23:45.770531Z",
     "iopub.status.idle": "2026-05-22T08:23:45.773599Z",
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     "shell.execute_reply.started": "2026-05-22T08:23:45.770802Z"
    }
   },
   "outputs": [],
   "source": [
    "from pathlib import Path\n",
    "\n",
    "\n",
    "with Path.open(\"data.txt\", \"w\") as f:\n",
    "    f.write(repr(data))"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "7f66aad5",
   "metadata": {},
   "source": [
    "## `ast.literal_eval`\n",
    "\n",
    "Die [ast.literal_eval()](https://docs.python.org/3/library/ast.html#ast.literal_eval)-Funktion parst und analysiert den Python-Datentyp eines Ausdrucks. Unterstützte Datentypen sind [Zeichenketten](https://python-basics-tutorial.readthedocs.io/de/latest/types/strings.html), [Zahlen](https://python-basics-tutorial.readthedocs.io/de/latest/types/numbers.html), [Tupel](https://python-basics-tutorial.readthedocs.io/de/latest/types/tuples.html), [Listen](https://python-basics-tutorial.readthedocs.io/de/latest/types/lists.html), [Dictionaries](https://python-basics-tutorial.readthedocs.io/de/latest/types/dicts.html) und [None](https://python-basics-tutorial.readthedocs.io/de/latest/types/none.html)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "03647a79",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-05-22T08:23:45.774493Z",
     "iopub.status.busy": "2026-05-22T08:23:45.774355Z",
     "iopub.status.idle": "2026-05-22T08:23:45.778592Z",
     "shell.execute_reply": "2026-05-22T08:23:45.778176Z",
     "shell.execute_reply.started": "2026-05-22T08:23:45.774480Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'id': 'veit', 'first_name': 'Veit', 'last_name': 'Schiele'}\n"
     ]
    }
   ],
   "source": [
    "import ast\n",
    "\n",
    "\n",
    "with Path.open(\"data.txt\") as f:\n",
    "    d = ast.literal_eval(f.read())\n",
    "\n",
    "print(d)"
   ]
  }
 ],
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