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-{
-  "metadata": {
-    "anaconda-cloud": {},
-    "kernelspec": {
-      "name": "python",
-      "display_name": "Python (Pyodide)",
-      "language": "python"
-    },
-    "language_info": {
-      "codemirror_mode": {
-        "name": "python",
-        "version": 3
-      },
-      "file_extension": ".py",
-      "mimetype": "text/x-python",
-      "name": "python",
-      "nbconvert_exporter": "python",
-      "pygments_lexer": "ipython3",
-      "version": "3.8"
-    }
-  },
-  "nbformat_minor": 4,
-  "nbformat": 4,
-  "cells": [
-    {
-      "cell_type": "markdown",
-      "source": "# DNBLab Jupyter Notebook zur SRU Abfrage",
-      "metadata": {
-        "nbpresent": {
-          "id": "d0d72cd5-034d-4b94-a4e2-54f7753cb9f0"
-        }
-      }
-    },
-    {
-      "cell_type": "markdown",
-      "source": "## SRU - Schnittstellenabfrage, Datenauslieferung und Ergebnisanzeige",
-      "metadata": {
-        "nbpresent": {
-          "id": "558898c3-e162-4e46-92d5-b4c914325790"
-        }
-      }
-    },
-    {
-      "cell_type": "markdown",
-      "source": "Lassen Sie uns gemeinsam folgenden Markdown *hier* einfügen:",
-      "metadata": {}
-    },
-    {
-      "cell_type": "markdown",
-      "source": "Dieses DNBLab-Tutorial beschreibt eine Beispielabfrage über die SRU-Schnittstelle mit Python. In der Jupyter Notebook Umgebung kann der dokumentierte Code direkt ausgeführt und angepasst werden. Das Tutorial umfasst die exemplarische Abfrage und Ausgabe der Daten in MARC21-xml zur weiteren Verarbeitung mit Python. ",
-      "metadata": {
-        "nbpresent": {
-          "id": "ee78241c-36e7-45e6-b015-0ef46f1e777d"
-        }
-      }
-    },
-    {
-      "cell_type": "markdown",
-      "source": "## Ganz wichtig, Zwischenspeichern nicht vergessen!",
-      "metadata": {}
-    },
-    {
-      "cell_type": "markdown",
-      "source": "## Arbeitsumgebung einrichten! <a class=\"anchor\" id=\"Teil1\"></a>",
-      "metadata": {
-        "nbpresent": {
-          "id": "3c6f6024-cb7c-4b65-8646-a753069cb5a4"
-        },
-        "tags": []
-      }
-    },
-    {
-      "cell_type": "code",
-      "source": "import urllib.parse\nfrom pyodide.http import open_url, pyfetch\nfrom js import fetch\nfrom bs4 import BeautifulSoup as soup\nimport unicodedata\nfrom lxml import etree\nimport pandas as pd",
-      "metadata": {
-        "trusted": true
-      },
-      "execution_count": 1,
-      "outputs": []
-    },
-    {
-      "cell_type": "markdown",
-      "source": "## Abfrage über alle Datensätze... <a class=\"anchor\" id=\"Teil2\"></a>",
-      "metadata": {}
-    },
-    {
-      "cell_type": "code",
-      "source": "async def dnb_sru(query):\n    \n    base_url = \"https://services.dnb.de/sru/dnb\"\n    params = {'recordSchema' : 'MARC21-xml',\n          'operation': 'searchRetrieve',\n          'version': '1.1',\n          'maximumRecords': '100',\n          'query': query\n         }\n    \n    r = await fetch(base_url + \"?\" + urllib.parse.urlencode(params))  \n    r_text = await r.text()\n    xml = soup(r_text, features=\"xml\")\n    records = xml.find_all('record', {'type':'Bibliographic'})\n    \n    \n    if len(records) < 100:\n        \n        return records\n    \n    else:\n        \n        num_results = 100\n        i = 101\n        while num_results == 100:\n            \n            params.update({'startRecord': i})\n            r = await fetch(base_url + \"?\" + urllib.parse.urlencode(params))  \n            r_text = await r.text()\n            xml = soup(r_text, features=\"xml\")\n            new_records = xml.find_all('record', {'type':'Bibliographic'})\n            records+=new_records\n            i+=100\n            num_results = len(new_records)\n            \n        return records",
-      "metadata": {
-        "trusted": true
-      },
-      "execution_count": 2,
-      "outputs": []
-    },
-    {
-      "cell_type": "markdown",
-      "source": "## Felder Titel und Links zu den Objekten durchsuchen... <a class=\"anchor\" id=\"Teil3\"></a>",
-      "metadata": {}
-    },
-    {
-      "cell_type": "code",
-      "source": "def parse_record(record):\n    \n    ns = {\"marc\":\"http://www.loc.gov/MARC21/slim\"}\n    xml = etree.fromstring(unicodedata.normalize(\"NFC\", str(record)))\n    \n    #idn\n    idn = xml.xpath(\"marc:controlfield[@tag = '001']\", namespaces=ns)\n    try:\n        idn = idn[0].text\n    except:\n        idn = 'fail'\n    \n    # link\n    link = xml.xpath(\"marc:datafield[@tag = '856']/marc:subfield[@code = 'u']\", namespaces=ns)\n    \n    try:\n        link = link[0].text\n        #titel = unicodedata.normalize(\"NFC\", titel)\n    except:\n        link = \"unkown\"\n        \n          # titel\n    titel = xml.xpath(\"marc:datafield[@tag = '245']/marc:subfield[@code = 'a']\", namespaces=ns)\n    \n    try:\n        titel = titel[0].text\n        #titel = unicodedata.normalize(\"NFC\", titel)\n    except:\n        titel = \"unkown\"\n        \n    \n    meta_dict = {\"idn\":idn,\n                 \"titel\":titel,\n                 \"link\":link}\n    \n    return meta_dict",
-      "metadata": {
-        "trusted": true
-      },
-      "execution_count": 15,
-      "outputs": []
-    },
-    {
-      "cell_type": "markdown",
-      "source": "# Abfrage nach Suchwort \"Biene\" im Titel + Links zu frei verfügbaren Objekten!",
-      "metadata": {}
-    },
-    {
-      "cell_type": "code",
-      "source": "records = await dnb_sru('tit=Biene and location=onlinefree')\nprint(len(records), 'Ergebnisse')",
-      "metadata": {
-        "trusted": true
-      },
-      "execution_count": 16,
-      "outputs": [
-        {
-          "name": "stdout",
-          "text": "17 Ergebnisse\n",
-          "output_type": "stream"
-        }
-      ]
-    },
-    {
-      "cell_type": "markdown",
-      "source": "## Anzeige der Treffer in einer Tabelle...  <a class=\"anchor\" id=\"Teil4\"></a>",
-      "metadata": {}
-    },
-    {
-      "cell_type": "code",
-      "source": "output = [parse_record(record) for record in records]\ndf = pd.DataFrame(output)\ndf",
-      "metadata": {
-        "trusted": true
-      },
-      "execution_count": 17,
-      "outputs": [
-        {
-          "execution_count": 17,
-          "output_type": "execute_result",
-          "data": {
-            "text/plain": "           idn                                              titel  \\\n0   1283345676  Verkauf der \"Biene\" an Franz Wagner in Leipzig...   \n1   1299731961  ˜Dieœ Biene und der Blitz - die eigenwillige K...   \n2   1246522276  Info Bee at UNICARagil: Support from Above for...   \n3   1213898609  ˜Dieœ Biene - Illustrierte Schüler*inarbeit - ...   \n4   1156534089  Aus der Wabe in die Welt: Biene macht Kultur. ...   \n5   118258280X  [Rezension zu:] Viel, Bernhard: Der Honigsamml...   \n6   1095550535  [Referentenmaterial] / Gesellschaft zur Verbre...   \n7   1263070647  Harald Weiss (Hg.): 100 Jahre Biene Maja: Vom ...   \n8   1076865429  Harald Weiss (Hg.): 100 Jahre Biene Maja: Vom ...   \n9   1046981080           Biene und Honig im pharaonischen Ägypten   \n10  1026527112  Temperature effects on the development in the ...   \n11  1081225548  Futterqualität und Rekrutierungsverhalten bei ...   \n12  1171169078                         ˜Dieœ Biene und ihre Zucht   \n13  1123508119                     Leben und Zucht der Honigbiene   \n14  1171169027  Melitto-Theologia : die Verherrlichung des glo...   \n15  1119154553            ˜Dieœ italienische Biene und ihre Zucht   \n16  1138282669                             Nektar – Biene – Honig   \n\n                                                 link  \n0   https://nbn-resolving.org/urn:nbn:de:101:1-202...  \n1   https://nbn-resolving.org/urn:nbn:de:bvb:384-o...  \n2            https://doi.org/10.18154/RWTH-2021-10614  \n3                        https://doi.org/10.18442/140  \n4   https://nbn-resolving.org/urn:nbn:de:bvb:20-op...  \n5   https://nbn-resolving.org/urn:nbn:de:hebis:30:...  \n6   https://nbn-resolving.org/urn:nbn:de:101:1-201...  \n7              https://doi.org/10.17192/ep2015.2.3594  \n8              https://doi.org/10.17192/ep2015.2.3594  \n9   https://nbn-resolving.org/urn:nbn:de:hebis:77-...  \n10  https://nbn-resolving.org/urn:nbn:de:bvb:355-e...  \n11  https://nbn-resolving.org/urn:nbn:de:hebis:30-...  \n12  https://nbn-resolving.org/urn:nbn:de:hebis:30-...  \n13  https://nbn-resolving.org/urn:nbn:de:hebis:30-...  \n14  https://nbn-resolving.org/urn:nbn:de:hebis:30-...  \n15  https://nbn-resolving.org/urn:nbn:de:hebis:30-...  \n16  https://nbn-resolving.org/urn:nbn:de:hbz:6-592...  ",
-            "text/html": "<div>\n<style scoped>\n    .dataframe tbody tr th:only-of-type {\n        vertical-align: middle;\n    }\n\n    .dataframe tbody tr th {\n        vertical-align: top;\n    }\n\n    .dataframe thead th {\n        text-align: right;\n    }\n</style>\n<table border=\"1\" class=\"dataframe\">\n  <thead>\n    <tr style=\"text-align: right;\">\n      <th></th>\n      <th>idn</th>\n      <th>titel</th>\n      <th>link</th>\n    </tr>\n  </thead>\n  <tbody>\n    <tr>\n      <th>0</th>\n      <td>1283345676</td>\n      <td>Verkauf der \"Biene\" an Franz Wagner in Leipzig...</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:101:1-202...</td>\n    </tr>\n    <tr>\n      <th>1</th>\n      <td>1299731961</td>\n      <td>˜Dieœ Biene und der Blitz - die eigenwillige K...</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:bvb:384-o...</td>\n    </tr>\n    <tr>\n      <th>2</th>\n      <td>1246522276</td>\n      <td>Info Bee at UNICARagil: Support from Above for...</td>\n      <td>https://doi.org/10.18154/RWTH-2021-10614</td>\n    </tr>\n    <tr>\n      <th>3</th>\n      <td>1213898609</td>\n      <td>˜Dieœ Biene - Illustrierte Schüler*inarbeit - ...</td>\n      <td>https://doi.org/10.18442/140</td>\n    </tr>\n    <tr>\n      <th>4</th>\n      <td>1156534089</td>\n      <td>Aus der Wabe in die Welt: Biene macht Kultur. ...</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:bvb:20-op...</td>\n    </tr>\n    <tr>\n      <th>5</th>\n      <td>118258280X</td>\n      <td>[Rezension zu:] Viel, Bernhard: Der Honigsamml...</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:hebis:30:...</td>\n    </tr>\n    <tr>\n      <th>6</th>\n      <td>1095550535</td>\n      <td>[Referentenmaterial] / Gesellschaft zur Verbre...</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:101:1-201...</td>\n    </tr>\n    <tr>\n      <th>7</th>\n      <td>1263070647</td>\n      <td>Harald Weiss (Hg.): 100 Jahre Biene Maja: Vom ...</td>\n      <td>https://doi.org/10.17192/ep2015.2.3594</td>\n    </tr>\n    <tr>\n      <th>8</th>\n      <td>1076865429</td>\n      <td>Harald Weiss (Hg.): 100 Jahre Biene Maja: Vom ...</td>\n      <td>https://doi.org/10.17192/ep2015.2.3594</td>\n    </tr>\n    <tr>\n      <th>9</th>\n      <td>1046981080</td>\n      <td>Biene und Honig im pharaonischen Ägypten</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:hebis:77-...</td>\n    </tr>\n    <tr>\n      <th>10</th>\n      <td>1026527112</td>\n      <td>Temperature effects on the development in the ...</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:bvb:355-e...</td>\n    </tr>\n    <tr>\n      <th>11</th>\n      <td>1081225548</td>\n      <td>Futterqualität und Rekrutierungsverhalten bei ...</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:hebis:30-...</td>\n    </tr>\n    <tr>\n      <th>12</th>\n      <td>1171169078</td>\n      <td>˜Dieœ Biene und ihre Zucht</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:hebis:30-...</td>\n    </tr>\n    <tr>\n      <th>13</th>\n      <td>1123508119</td>\n      <td>Leben und Zucht der Honigbiene</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:hebis:30-...</td>\n    </tr>\n    <tr>\n      <th>14</th>\n      <td>1171169027</td>\n      <td>Melitto-Theologia : die Verherrlichung des glo...</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:hebis:30-...</td>\n    </tr>\n    <tr>\n      <th>15</th>\n      <td>1119154553</td>\n      <td>˜Dieœ italienische Biene und ihre Zucht</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:hebis:30-...</td>\n    </tr>\n    <tr>\n      <th>16</th>\n      <td>1138282669</td>\n      <td>Nektar – Biene – Honig</td>\n      <td>https://nbn-resolving.org/urn:nbn:de:hbz:6-592...</td>\n    </tr>\n  </tbody>\n</table>\n</div>"
-          },
-          "metadata": {}
-        }
-      ]
-    },
-    {
-      "cell_type": "markdown",
-      "source": "# Speichern der Ergebnisse als CSV-Datei!",
-      "metadata": {}
-    },
-    {
-      "cell_type": "code",
-      "source": "df.to_csv(\"SRU_Titel.csv\", index=False)",
-      "metadata": {
-        "trusted": true
-      },
-      "execution_count": 18,
-      "outputs": []
-    }
-  ]
-}
\ No newline at end of file