{"id":55199,"date":"2020-01-15T00:00:00","date_gmt":"2020-01-14T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/tsenoj-perevoda-mercurial-na-python-3-mozhet-stat-shlejf-nepredvidennyh-oshibok"},"modified":"2020-02-18T14:03:17","modified_gmt":"2020-02-18T11:03:17","slug":"tsenoj-perevoda-mercurial-na-python-3-mozhet-stat-shlejf-nepredvidennyh-oshibok","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/tsenoj-perevoda-mercurial-na-python-3-mozhet-stat-shlejf-nepredvidennyh-oshibok","title":{"rendered":"Cena prekladu Mercurial na Python 3 m\u00f4\u017ee by\u0165 sprev\u00e1dzan\u00e1 nepredv\u00eddate\u013en\u00fdmi chybami.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Udr\u017eiavate\u013e syst\u00e9mu spr\u00e1vy verzi\u00ed Mercurial<\/a><\/noindex> zhrnul v\u00fdsledok<\/a><\/noindex> pr\u00e1ce na preklade projektu z Pythonu 2 na Python 3. Napriek tomu, \u017ee prv\u00e9 pokusy o portovanie boli vykonan\u00e9 u\u017e v roku 2008 a v ur\u00fdchlenom re\u017eime sa adapt\u00e1cia na Python 3 za\u010dala v roku 2015, pln\u00e1 mo\u017enos\u0165 pou\u017e\u00edvania Python 3 bola implementovan\u00e1 a\u017e v poslednej verzii Mercurial 5.2. <\/p>\n

Predpoklady o stabilite portovania na Python 3 s\u00fa nepriazniv\u00e9. Predpoklad\u00e1 sa najm\u00e4, \u017ee po\u010das nieko\u013ek\u00fdch rokov sa v k\u00f3de objavia sporadick\u00e9 chyby, ke\u010f\u017ee testy nezah\u0155\u0148aj\u00fa 100% k\u00f3dovej z\u00e1kladne a mnoh\u00e9 probl\u00e9my ost\u00e1vaj\u00fa nevidite\u013en\u00e9 pri statickej anal\u00fdze a objavia sa a\u017e po\u010das behu aplik\u00e1cie. Okrem toho zost\u00e1vaj\u00fa mnoh\u00e9 extern\u00e9 doplnky a roz\u0161\u00edrenia nepremenen\u00e9 na Python 3.
\nKe\u010f\u017ee pri portovan\u00ed bolo rozhodnut\u00e9 postupne prisp\u00f4sobi\u0165 k\u00f3d pre Python 3, pri\u010dom sa zachov\u00e1vala podpora Python 2, k\u00f3d sa zaplnil mno\u017estvom hackov na prepojenie Pythonu 2 a 3, ktor\u00e9 po ukon\u010den\u00ed podpory Python 2 bude nevyhnutn\u00e9 vy\u010disti\u0165. <\/p>\n

K situ\u00e1cii okolo Pythonu 3 udr\u017eiavate\u013e Mercurial uviedol, \u017ee rozhodnutie o posunut\u00ed nekompatibiln\u00e9ho Pythonu 3 a jeho presadenie ako nov\u00e9ho, spr\u00e1vneho jazyka bez aktu\u00e1lnych prielomov\u00fdch vylep\u0161en\u00ed bola ve\u013ek\u00e1 chyba, ktor\u00e1 sp\u00f4sobila zna\u010dn\u00e9 \u0161kody komunite a je pr\u00edkladom toho, ako by ve\u013ek\u00e9 projekty nemali kona\u0165. Namiesto postupn\u00e9ho zvy\u0161ovania funk\u010dnosti a poskytnutia mo\u017enosti inkrement\u00e1lnej adapt\u00e1cie aplik\u00e1ci\u00ed boli po vydan\u00ed Pythonu 3 n\u00faten\u00ed v\u00fdvoj\u00e1ri prek\u00f3dova\u0165 a vynalo\u017ei\u0165 prostriedky na udr\u017eovanie oddelen\u00fdch vetiev pre Python 2 a Python 3. A\u017e sedem rokov po vydan\u00ed Pythonu 3.0 boli v Python 3.5 implementovan\u00e9 funkcie, ktor\u00e9 u\u013eah\u010dovali proces prechodu a zabezpe\u010dili fungovanie jednej k\u00f3dovej z\u00e1kladne s Pythonom 2 a Pythonom 3. <\/p>\n

<\/a><\/noindex><\/p>\n

Zdroj: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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