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   "source": [
    "# Software Entwicklung \n",
    "\n",
    "## Kapitel 9: IO\n",
    "\n",
    "### 9.5 Sockets"
   ]
  },
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   "source": [
    "#### 9.5.3 Beispiel für einen Server"
   ]
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   "source": [
    "import socket\n",
    "\n",
    "with socket.socket() as server:      # Generieren eines Sockets\n",
    "    host = socket.gethostname()      # Die eigene IP-Nummer\n",
    "    port = 12345                     # Festlegen des Ports\n",
    "    server.bind((host, port))        # Bind\n",
    "    server.listen()                  # Listen (blockiert nicht)\n",
    "    print(\"Ich lausche...\")\n",
    "\n",
    "    for contact in range(0, 10):\n",
    "        connection, addr = server.accept()         # blockiert\n",
    "        with connection:\n",
    "            print('Verbindung von ', addr)\n",
    "            msg = f'Danke für das Vorbeischauen, #{contact+1}!\\n'\n",
    "            connection.send(msg.encode('utf-8'))   # Senden \n",
    "\n",
    "    print(\"Das wars!\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
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     "name": "#%% md\n"
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   "source": [
    "Textnachrichten, die über ein Socket versendet werden sollen, müssen in Bytes\n",
    "umgewandelt werden.\n"
   ]
  }
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