Back to Question Center
0

Semalt: Ziziphi iilwimi eziphambili zoLungiselelo lokuHlola iSayithi?

1 answers:

I-Web scraping, eyaziwa nangokuthi ukukhutshwa kwedatha nokuvunwa kwewebhu, yindlela yokucima idatha evela kwiindawo ezahlukeneyo. I-software yokuqhafaza i-intanethi ukufikelela kwi-intanethi okanye kwi-browser yewebhu okanye nge-Transfer Protocol Transfer Protocol. Ukuqhwala kwiWebhu kuvame ukuphunyezwa ngokuncedisa i-automated bots okanye i-web crawlers. Bahamba ngamaphepha ahlukeneyo ewebhu, baqokele idatha baze bayikhuphe njengemfuno zabasebenzisi. Umxholo wephepha lewebhu ukhutshwe, utshintshwe kwaye uphando, ngelixa idatha ikopishwe kwiipredishithi ngokucwangciswa ngokupheleleyo ngokuhambelana nemiyalelo - hospedagem de sites gratis em phpmyadmin.

Ikhasi lewebhu lakhiwa ngeelwimi ezisetyenziswe ngokubhaliweyo ezifana ne-HTML, Python, ne-XHTML. Iqule ubuncwane bolwazi kwaye yenzelwe abantu, kungekhona i-web scraping bots. Nangona kunjalo, izixhobo ezahlukeneyo zokuhlamba ziyakwazi ukufunda ezi zifana nabantu kwaye zifumane ulwazi olufanelekileyo kwiifom ze-CSV okanye ze-JSON.

Ngaba i-Python iyona nto ilungileyo yolwimi yokutshiza?

I-Python ngokuyinqobo ulwimi lwenkqubo olunikeza "igobolondo" ukuba ichane idatha ngendlela yoxwebhu olucacileyo. Inceda abasebenzisi ukuba bakhiphe ulwazi kwiimpawu ezahlukeneyo zewebhu. I-Python iyakunceda xa abathengisi be-digital okanye abaprogram banquma ukukhangela idatha ngesandla. Ngalolu lwimi, sinokungena kalula umgca wekhowudi kwaye sibone indlela idatha ngayo. Nangona kunjalo, i-Python ayilona ulwimi elona lililo lihle kakhulu.

I-Python inamakhulu amanyathelo encedo ayenzelwe ukugcina ixesha lethu. Ngokomzekelo, lidumileyo phakathi kweengcali zophando kunye nolwazi. I-Python yenza kube lula ngathi ukukhangela idatha efanelekileyo kunye namaphepha e-intanethi kwi-intanethi. Kodwa xa kuziwa kwi-web scraping, i-Python ayisebenzisi njengeC ++ kunye ne-PHP. I-Python iyaziwa ngokuxhasa kwayo eyakhelwe ngaphakathi kwaye igcina idatha kwiifom eziqhelekileyo ezifana ne-JSON ne-CSV.

Iilwimi eziphambili zokusetyenziswa kwewebhu:

Ngoku kuyacaca ukuba iPython ayiyona ilwimi elungileyo kwi-web scraping. Kunoko, abaninzi beprogram kunye neenkcukacha zesayensi bazikhethela iC ++, i-Node. js, kunye ne-PHP phezu kwePython.

iNode. js:

Kukulungele ukutshitshisa nokukhwela iziza ezahlukeneyo. INode. js ifanelekile kwiiwebhsayithi ezinamandla kunye neenkxaso ezisasazwayo kwi-intanethi. Olu lwimi luncedo ekutshekeni idatha kokubili kwiiwebhusayithi eziphambili neziphambili.

I-C ++:

I-C ++ inika ukusebenza okukhulu kwaye ixabiso elifanelekileyo. Olu lwimi lungcono kakhulu kunePython kwaye luqinisekisa iziphumo eziphezulu. Nangona kunjalo, akukhuthazwa ukuba amashishini ngenxa yamakhowudi anzima.

i-PHP:

i-PHP yilwimi efanelekileyo kwi-web scraping. Ngokungafani nePython neC ++, i-PHP ayilenzi iingxaki ngexesha ihlela imisebenzi kunye nokukhangela umxholo kwiiwebhusayithi ezahlukeneyo.Kufana nomgca wonke kwaye uphatha amaninzi kwi-web-crawling kunye neeprojekti zokukhutshwa kwedatha kwi-intanethi. Ngenisa. Io kunye neKimono Labs zizinto ezimbini ezinamandla zokucoca idatha ngokusekelwe kwi-PHP. Zinezinto ezintle kwaye ziyakwazi ukukhawula inani elikhulu lamakhasi ewebhu ngeyure okanye ezimbini. Ngelishwa, i-Soup Beautiful kunye neCrothon (esekelwe kwi-Python) ayinikezeli naliphi na inkxaso njengoko izixhobo zedatha yokukhutshwa kwedatha esekelwe kwi-PHP.

Ngoku kuyacaca ukuba zonke iilwimi zeprogram zineenzuzo kunye nezibi. I-PHP, nangona kunjalo, i bhetele ngakumbi kunePython kwaye iyona nto ilungileyo yolwimi lwe-scraping language. Inikeza izibonelelo ezingcono kubasebenzisi kwaye zingakwazi ukuphatha iiprojekthi ezinkulu ngokukhawuleza.

December 22, 2017