MediaWiki 导出
MediaWiki XML 导出文件包含 Wiki 的内容（包含所有修订版本的 Wiki 页面），但不包含站点相关数据。XML 导出文件不创建 Wiki 数据库的完整备份，其中不包含用户帐户、图像、编辑日志等。
本文介绍如何将 MediaWiki XML 导出文件加载到可供下游使用的文档格式中。
它使用 mwxml 来自 mediawiki-utilities 进行导出，并使用 mwparserfromhell 来自 earwig 解析 MediaWiki wiki 代码。
导出文件可以通过 dumpBackup.php 获取，或者在 Special:StatisticsWiki 页面上获取。
# mediawiki-utilities supports XML schema 0.11 in unmerged branches
%pip install --upgrade --quiet git+https://github.com/mediawiki-utilities/python-mwtypes@updates_schema_0.11
# mediawiki-utilities mwxml has a bug, fix PR pending
%pip install --upgrade --quiet git+https://github.com/gdedrouas/python-mwxml@xml_format_0.11
%pip install --upgrade --quiet mwparserfromhell
from langchain_community.document_loaders import MWDumpLoader
API 参考：MWDumpLoader
loader = MWDumpLoader(
file_path="example_data/testmw_pages_current.xml",
encoding="utf8",
# namespaces = [0,2,3] Optional list to load only specific namespaces. Loads all namespaces by default.
skip_redirects=True, # will skip over pages that just redirect to other pages (or not if False)
stop_on_error=False, # will skip over pages that cause parsing errors (or not if False)
)
documents = loader.load()
print(f"You have {len(documents)} document(s) in your data ")
You have 177 document(s) in your data
documents[:5]
[Document(page_content='\t\n\t\n\tArtist\n\tReleased\n\tRecorded\n\tLength\n\tLabel\n\tProducer', metadata={'source': 'Album'}),
Document(page_content='{| class="article-table plainlinks" style="width:100%;"\n|- style="font-size:18px;"\n! style="padding:0px;" | Template documentation\n|-\n| Note: portions of the template sample may not be visible without values provided.\n|-\n| View or edit this documentation. (About template documentation)\n|-\n| Editors can experiment in this template\'s [ sandbox] and [ test case] pages.\n|}Category:Documentation templates', metadata={'source': 'Documentation'}),
Document(page_content='Description\nThis template is used to insert descriptions on template pages.\n\nSyntax\nAdd <noinclude></noinclude> at the end of the template page.\n\nAdd <noinclude></noinclude> to transclude an alternative page from the /doc subpage.\n\nUsage\n\nOn the Template page\nThis is the normal format when used:\n\nTEMPLATE CODE\n<includeonly>Any categories to be inserted into articles by the template</includeonly>\n<noinclude>{{Documentation}}</noinclude>\n\nIf your template is not a completed div or table, you may need to close the tags just before {{Documentation}} is inserted (within the noinclude tags).\n\nA line break right before {{Documentation}} can also be useful as it helps prevent the documentation template "running into" previous code.\n\nOn the documentation page\nThe documentation page is usually located on the /doc subpage for a template, but a different page can be specified with the first parameter of the template (see Syntax).\n\nNormally, you will want to write something like the following on the documentation page:\n\n==Description==\nThis template is used to do something.\n\n==Syntax==\nType <code>{{t|templatename}}</code> somewhere.\n\n==Samples==\n<code><nowiki>{{templatename|input}}</nowiki></code> \n\nresults in...\n\n{{templatename|input}}\n\n<includeonly>Any categories for the template itself</includeonly>\n<noinclude>[[Category:Template documentation]]</noinclude>\n\nUse any or all of the above description/syntax/sample output sections. You may also want to add "see also" or other sections.\n\nNote that the above example also uses the Template:T template.\n\nCategory:Documentation templatesCategory:Template documentation', metadata={'source': 'Documentation/doc'}),
Document(page_content='Description\nA template link with a variable number of parameters (0-20).\n\nSyntax\n \n\nSource\nImproved version not needing t/piece subtemplate developed on Templates wiki see the list of authors. Copied here via CC-By-SA 3.0 license.\n\nExample\n\nCategory:General wiki templates\nCategory:Template documentation', metadata={'source': 'T/doc'}),
Document(page_content='\t\n\t\t \n\t\n\t\t Aliases\n\t Relatives\n\t Affiliation\n Occupation\n \n Biographical information\n Marital status\n \tDate of birth\n Place of birth\n Date of death\n Place of death\n \n Physical description\n Species\n Gender\n Height\n Weight\n Eye color\n\t\n Appearances\n Portrayed by\n Appears in\n Debut\n ', metadata={'source': 'Character'})]