datenbanken gestartet

python/datenbanken/datenbanken.ipynb

@@ -0,0 +1,96 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import psycopg2\n",
+    "\n",
+    "conn = psycopg2.connect(host=\"localhost\", database=\"uni-db\", user=\"postgres\", password=\"password\")\n",
+    "\n",
+    "conn.close()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'host': 'localhost', 'database': 'uni-db', 'user': 'postgres', 'password': 'password'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "from configparser import ConfigParser\n",
+    "\n",
+    "def config(filename=\"dbconfig.ini\", section=\"postgresql\"):\n",
+    "    parser = ConfigParser()\n",
+    "    parser.read(filename)\n",
+    "\n",
+    "    db = {}\n",
+    "    if parser.has_section(section):\n",
+    "        params = parser.items(section)\n",
+    "        db = {param[0] : param[1] for param in params}\n",
+    "    else:\n",
+    "        raise Exception(f\"Section: {section} not found in {filename}\")\n",
+    "\n",
+    "    return db\n",
+    "\n",
+    "print(config())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[(2125, 'Sokrates', 'C4', 226), (2126, 'Russel', 'C4', 232), (2127, 'Kopernikus', 'C3', 310), (2133, 'Popper', 'C3', 52), (2134, 'Augustinus', 'C3', 309), (2136, 'Curie', 'C4', 36), (2137, 'Kant', 'C4', 7)]\n"
+     ]
+    }
+   ],
+   "source": [
+    "conn = psycopg2.connect(**config())\n",
+    "\n",
+    "cur = conn.cursor()\n",
+    "\n",
+    "cur.execute(\"SELECT * FROM professoren\")\n",
+    "\n",
+    "print(cur.fetchall())\n",
+    "\n",
+    "conn.close()"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "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": "3.11.3"
+  },
+  "orig_nbformat": 4
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}

python/datenbanken/dbconfig.ini

@@ -0,0 +1,5 @@
+[postgresql]
+host=localhost
+database=uni-db
+user=postgres
+password=password