Cov txheej txheem:
Video: Koj siv cov kua zaub zoo li cas hauv Python?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Yog tias koj tab tom siv Debian los yog Ubuntu Linux tsis ntev los no, koj tuaj yeem nruab Cov Kua Zaub Zoo Nkauj nrog tus tswj hwm pob:
- $ apt-mus nruab python -bs4 (rau Python 2)
- $ apt-mus nruab python3-bs4 (rau Python 3)
- $ easy_install beautifulsoup4.
- $ pip nruab beautifulsoup4.
- $ python setup.py nruab.
Ib yam li ntawd, tib neeg nug, ua li cas koj ua kua zaub zoo nkauj hauv Python?
Siv zoo nkauj kua zaub , koj yuav tsum nruab nws: $ pip nruab beautifulsoup4. Qab Zib kuj tso siab rau tus parser, lub neej ntawd yog lxml. Tej zaum koj twb tau muaj nws, tab sis koj yuav tsum xyuas (qhib IDLE thiab sim import lxml). Yog tias tsis yog, ua: $ pip nruab lxml lossis $ apt- tau nruab python -lxml ib.
Ib yam li ntawd, koj yuav ua li cas import Cov kua zaub zoo nkauj? Pib, ntshuam tus Qab Zib tsev qiv ntawv, qhib cov ntaub ntawv HTML thiab dhau mus rau Qab Zib , thiab tom qab ntawd luam cov zoo nkauj ” version hauv lub davhlau ya nyob twg. Koj yuav tsum pom koj lub qhov rais davhlau ya nyob twg sau nrog cov ntawv zoo zoo ntawm cov ntawv html thawj (saib daim duab 3).
Ib yam li ntawd, nws yog nug, dab tsi yog cov kua zaub zoo nkauj siv rau?
Qab Zib yog ib pob Python rau parsing HTML thiab XML cov ntaub ntawv (xws li muaj malformed markup, i.e. tsis-kaw tag, thiaj li muaj npe tom qab tag kua zaub ). Nws tsim ib tsob ntoo parse rau parsed nplooj ntawv uas yuav ua tau siv txhawm rau rho tawm cov ntaub ntawv los ntawm HTML, uas yog qhov muaj txiaj ntsig zoo rau web scraping.
Yuav ua li cas koj khawb ib lub vev xaib nrog Python thiab BeautifulSoup?
Ua ntej, peb yuav tsum tau import tag nrho cov tsev qiv ntawv uas peb yuav siv. Tom ntej no, tshaj tawm qhov sib txawv rau qhov url ntawm nplooj ntawv. Tom qab ntawd, siv lub Python urllib2 kom tau txais nplooj ntawv HTML ntawm url tshaj tawm. Thaum kawg, txheeb xyuas nplooj ntawv rau hauv BeautifulSoup format kom peb siv tau BeautifulSoup mus ua hauj lwm rau nws.
Pom zoo:
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