2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
7 Teb. Tsis muaj txoj hauv kev los txiav txim siabyog nplooj ntawv raug muab pov tseg. Tab sis, yog tias koj tus scraper tau nrov los yog koj siv nws hnyav heev, nws muaj peev xwm txheeb xyuas qhov txheeb cais. Yog tias koj pom ib tus IP rub tib nplooj ntawv lossis nplooj ntawv tib lub sijhawm txhua hnub, koj tuaj yeem ua qhov kev kawm paub.
Koj puas tuaj yeem ntsib teeb meem rau lub vev xaib?
Web scraping thiab nkag tsis txhaum cai los ntawm lawv tus kheej. Tom qab tag nrho, koj tuaj yeem khawb lossis nkag koj tus kheej lub vev xaib, tsis muaj kev cuam tshuam. … Lub tsev hais plaub tau tso cai rau kev txiav txim vim tias cov neeg siv yuav tsum tau xaiv thiab pom zoo rau cov nqe lus ntawm kev pabcuam ntawm lub xaib thiab tias ntau tus bots tuaj yeem cuam tshuam rau eBay lub computer systems.
Yuav ua li cas thiaj tsis ntes tau lub vev xaib?
kauj ruam:
- Nrhiav lub vev xaib pub dawb tus kws kho mob.
- Scrape the proxies.
- Xaiv cov npe thiab txuag cov neeg ua haujlwm.
- Tsim koj qhov kev thov ntau zaus (sim ua kom nws random)
- Dynamically tig tus neeg sawv cev thiab xa koj cov lus thov los ntawm cov npe no.
- Automate txhua yam.
Koj puas tuaj yeem tau txais tus IP txwv tsis pub rub lub vev xaib?
tus tswv lub vev xaib tuaj yeem ntes thiab thaiv koj lub vev xaib scrapers los ntawm kev txheeb xyuas IP chaw nyob hauv lawv cov ntaub ntawv teev npe. Feem ntau muaj cov cai tswj kev siv tshuab, piv txwv li yog tias koj ua ntau dua 100 qhov kev thov hauv 1 teev koj tus IP yuav raug thaiv.
Yuav ua li cas paub yog tias koj tuaj yeem rub lub vev xaib?
Ibxaj kom kuaj xyuas seb lub vev xaib puas txhawb nqa lub vev xaib, koj yuav tsum append “/ neeg hlau. txt mus rau qhov kawg ntawm qhov URL ntawm lub vev xaib koj tab tom tsom. Nyob rau hauv tas li ntawd, koj yuav tsum tau mus xyuas ntawm qhov chaw tshwj xeeb uas mob siab rau lub web scraping. Nco ntsoov paub txog kev cai lij choj thiab nyeem txog kev siv ncaj ncees.
Pom zoo:
Lub sijhawm twg ntawm qhov kev tshawb fawb tshawb fawb yog qhov tseem ceeb tshaj?
Teb: Thaum theem thib ob kev tshawb nrhiav kev tshawb fawb muaj txiaj ntsig. Dab tsi yog qhov tseem ceeb tshaj plaws ntawm kev tshawb nrhiav kev tshawb fawb? Qhov nyuaj tshaj plaws thiab tseem ceeb tshaj plaws ntawm Txoj Kev Tshawb Fawb:
Koj puas tuaj yeem pom fovea centralis nrog lub qhov muag pom?
Saib ntawm Retina Los ntawm Ophthalmoscope Nyob rau sab xis yog daim duab ntawm tus neeg saib xyuas qhov muag pom thaum saib koj lub retina nrog ophthalmoscope. Qhov tsaus ntuj ze ntawm qhov chaw yog lub fovea. … Thaum peb kho (saib ncaj qha ntawm) cov khoom, cov duab ntawm cov khoom no yog npaj rau ntawm fovea.
Cov kws tshawb fawb puas tuaj yeem dhau los ua tus kws tshawb fawb?
Thawj cov neeg caij nkoj yog cov tub rog uas muaj kev paub txog kev ya dav hlau dav hlau thiab keeb kwm hauv engineering. … Rov qab los, ib qho kev tsim nyog rau cov kws tshawb fawb-astronauts yogtus kws kho mob hauv tshuaj, engineeringlossis kev tshawb fawb ntuj xws li physics, chemistry lossis biology.
Koj puas tuaj yeem siv qhov muag pom qhov muag liab qab nrog kev sib cuag?
Tsis txhob siv cov tshuaj txo qis thaum hnav cov lo ntsiab muag. Yog tias koj kho koj qhov muag qhuav, ua xua rau qhov muag, qhov muag khaus, thiab lwm yam. Kuv puas tuaj yeem siv Clear Eyes qhov muag dauv nrog kev sib cuag? KEV PAB:
Thaum twg Mendel qhov kev tshawb pom pom?
Mendel thawj zaug nthuav tawm nws cov txiaj ntsig hauv ob qhov kev qhuab qhia cais hauv 1865rau Natural Science Society hauv Brünn. Nws daim ntawv "Kev sim ntawm tsob nroj Hybrids" tau luam tawm nyob rau hauv lub zej zog cov phau ntawv journal, Verhandlungen des naturforschenden Vereines hauv Brünn, xyoo tom ntej.
