如何使用库来获取维基百科页面？

Posted 2021-03-31

我一直试图弄清楚mwapi库（MediaWiki API）的文档，我无法弄清楚如何根据搜索查询或关键字简单地请求页面。我知道我应该使用get()，但用关键字填充参数会产生错误。有谁知道这是如何工作来查找像“地球风和火”这样的东西？

文档可以在这里找到：http://pythonhosted.org/mwapi

这是他们使用get（）的唯一例子

import mwapi

session = mwapi.Session('https://en.wikipedia.org')

print(session.get(action='query', meta='userinfo'))

{'query': {'userinfo': {'anon': '', 'name': '75.72.203.28', 'id': 0}}, 'batchcomplete': ''}

print(session.get(action='query', prop='revisions', revids=32423425))

{'query': {'pages': {'1429626': {'ns': 0, 'revisions': [{'user': 'Wknight94', 'parentid': 32276615, 'comment': '/* References */ Removing less-specific cat', 'revid': 32423425, 'timestamp': '2005-12-23T00:07:17Z'}], 'title': 'Grigol Ordzhonikidze', 'pageid': 1429626}}}, 'batchcomplete': ''}

答案

也许这段代码可以帮助您理解API：

import json  # Used only to pretty-print dictionaries.
import mwapi

USER_AGENT = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.0.6) Gecko/2009011913  Firefox'

session = mwapi.Session('https://en.wikipedia.org', user_agent=USER_AGENT)

query = session.get(action='query', titles='Earth Wind and Fire')
print('query returned:')
print(json.dumps(query, indent=4))

pages = query['query']['pages']
if pages:
    print('
pages:')
    for pageid in pages:
        data = session.get(action='parse', pageid=pageid, prop='text')
        print(json.dumps(data, indent=4))

输出：

query returned:
{
    "batchcomplete": "",
    "query": {
        "pages": {
            "313370": {
                "pageid": 313370,
                "ns": 0,
                "title": "Earth Wind and Fire"
            }
        }
    }
}

pages:
{
    "parse": {
        "title": "Earth Wind and Fire",
        "pageid": 313370,
        "text": {
            "*": "<div class="redirectMsg"><p>Redirect to:</p><ul class="redirectText"><li><a href="/wiki/Earth,_Wind_%26_Fire" title="Earth, Wind &amp; Fire">Earth, Wind &amp; Fire</a></li></ul></div><div class="mw-parser-output">

<!-- 
NewPP limit report
Parsed by mw1279
Cached time: 20171121014700
Cache expiry: 1900800
Dynamic content: false
CPU time usage: 0.000 seconds
Real time usage: 0.001 seconds
Preprocessor visited node count: 0/1000000
Preprocessor generated node count: 0/1500000
Postu2010expand include size: 0/2097152 bytes
Template argument size: 0/2097152 bytes
Highest expansion depth: 0/40
Expensive parser function count: 0/500
-->
<!--
Transclusion expansion time report (%,ms,calls,template)
100.00%    0.000      1 -total
-->
</div>
<!-- Saved in parser cache with key enwiki:pcache:idhash:313370-0!canonical and timestamp 20171121014700 and revision id 16182229
 -->
"
        }
    }
}