Video: LXML ua dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
lxml ib yog lub tsev qiv ntawv Python uas tso cai rau kev tuav tau yooj yim ntawm XML thiab HTML cov ntaub ntawv, thiab ua tau kuj tseem siv tau rau web scraping.
Ib yam li ntawd, LXML parser yog dab tsi?
lxml ib muab qhov yooj yim heev thiab muaj zog API rau kev txheeb xyuas XML thiab HTML. Nws txhawb nqa ib kauj ruam kev txheeb xyuas raws li ib tug step-by-step kev txheeb xyuas siv qhov kev tshwm sim-tsav API (tam sim no tsuas yog rau XML).
Kuj Paub, koj siv LXML li cas nrog BeautifulSoup? Rau siv cov kua zaub zoo nkauj , koj yuav tsum nruab nws: $ pip nruab beautifulsoup4. Qab Zib kuj tso siab rau tus parser, lub neej ntawd yog lxml ib . Tej zaum koj twb muaj lawm, tab sis koj yuav tsum xyuas (qhib IDLE thiab sim import lxml ib ). Yog tsis yog, ua: $pip install lxml ib los yog $ apt-tau nruab python- lxml ib.
Ib yam li ntawd, nws tau nug, LXML yog dab tsi hauv BeautifulSoup?
BeautifulSoup yog ib pob Python uas parses tawg HTML, ib yam li lxml ib txhawb nws raws li parser ntawm libxml2. Txhawm rau tiv thaiv cov neeg siv los ntawm kev xaiv lawv lub tsev qiv ntawv parser ua ntej, lxml ib tuaj yeem cuam tshuam rau lub peev xwm parsing ntawm BeautifulSoup dhau ntawm lxml ib . html. zaub mov module.
XPath rov qab los li cas?
XPath rov values True or False, thaum lub XPath kev qhia muaj qhov tshwm sim boolean. float, thaum lub XPath kev nthuav qhia muaj tus lej tshwm sim (tus lej lossis ntab)
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