{"id":72012,"date":"2020-02-29T21:04:04","date_gmt":"2020-02-29T18:04:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/reliz-jpype-0-7-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python"},"modified":"2020-03-03T16:10:24","modified_gmt":"2020-03-03T13:10:24","slug":"reliz-jpype-0-7-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/reliz-jpype-0-7-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python","title":{"rendered":"Vyd\u00e1n\u00ed JPype 0.7.2, knihovny pro p\u0159\u00edstup k Java t\u0159\u00edd\u00e1m z Pythonu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/releases\/tag\/v0.7.2\">Dostupn\u00e9<\/a><\/noindex> verze vrstvy <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">JPype 0.7.2<\/a><\/noindex>, kter\u00e1 umo\u017e\u0148uje pln\u00fd p\u0159\u00edstup Python aplikac\u00ed k Java knihovn\u00e1m t\u0159\u00edd. Pomoc\u00ed JPype je mo\u017en\u00e9 vyu\u017e\u00edvat specifick\u00e9 Java knihovny z Pythonu a vytv\u00e1\u0159et hybridn\u00ed aplikace kombinuj\u00edc\u00ed k\u00f3d v Java a Python. Na rozd\u00edl od Jythonu, integrace s Java je dosa\u017eena nikoli vytvo\u0159en\u00edm varianty Pythonu pro JVM, ale interakc\u00ed na \u00farovni obou virtu\u00e1ln\u00edch stroj\u016f s vyu\u017eit\u00edm sd\u00edlen\u00e9 pam\u011bti. Tento p\u0159\u00edstup nejen\u017ee poskytuje dobrou v\u00fdkonnost, ale tak\u00e9 umo\u017e\u0148uje p\u0159\u00edstup ke v\u0161em knihovn\u00e1m CPython a Java. K\u00f3d projektu <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">distribuov\u00e1no<\/a><\/noindex> pod licenc\u00ed Apache 2.0.<\/p>\n<p>Hlavn\u00ed zm\u011bny:<\/p>\n<ul>\n<li class=\"l\"> V\u00fdjimky vyhozen\u00e9 v k\u00f3du C++ a Java nyn\u00ed poskytuj\u00ed z\u00e1sobn\u00edk v\u00fdjimek, kdy\u017e dojde k v\u00fdjimce v k\u00f3du Python. D\u00edky tomu ji\u017e nen\u00ed pot\u0159eba volat stacktrace() pro z\u00edsk\u00e1n\u00ed informac\u00ed o z\u00e1sobn\u00edku v\u00fdjimek.\n<li class=\"l\"> Rychlost vracen\u00ed p\u0159i vol\u00e1n\u00edch byla t\u0159ikr\u00e1t zv\u00fd\u0161ena.\n<li class=\"l\"> Rychlost p\u0159enosu byla podstatn\u011b (o \u0159\u00e1dy) zv\u00fd\u0161ena v<br \/>\nnumpy bufferech v\u00edcerozm\u011brn\u00fdch pol\u00ed. V\u00edcerozm\u011brn\u00e9 primitivy p\u0159ed\u00e1vaj\u00ed pouze pro \u010dten\u00ed kopie vytvo\u0159en\u00e9 uvnit\u0159 JVM s kontinu\u00e1ln\u00edm uspo\u0159\u00e1d\u00e1n\u00edm C.<\/p>\n<li class=\"l\"> V\u0161echny intern\u011b vystaven\u00e9 komponenty byly nahrazeny implementacemi z CPython a symboly __javaclass__, __javavalue__ a __javaproxy__<br \/>\nbyly odstran\u011bny. V\u0161echny typy CPython, kter\u00e9 byly zd\u011bd\u011bny z typ\u016f t\u0159\u00eddy jpype, byly vybaveny vyhrazen\u00fdm Java slotem. V\u0161echny soukrom\u00e9 tabulky byly p\u0159evedeny do CPython. Java typy nyn\u00ed mus\u00ed b\u00fdt zd\u011bd\u011bny z metaklasu JClass, kter\u00fd pou\u017e\u00edv\u00e1 sloty typ\u016f. M\u00edsen\u00ed s z\u00e1kladn\u00edmi Python t\u0159\u00eddami nen\u00ed povoleno. Typy Object, Proxy, Exception, Number a Array jsou zd\u011bd\u011bny p\u0159\u00edmo z intern\u00edch implementac\u00ed CPython.<\/p>\n<li class=\"l\"> Byla vylep\u0161ena trasov\u00e1n\u00ed a zpracov\u00e1n\u00ed v\u00fdjimek.\n<li class=\"l\"> \u0158ez\u00e1n\u00ed pol\u00ed (Array slices) je nyn\u00ed zpracov\u00e1v\u00e1no jako pohledy, kter\u00e9 podporuj\u00ed zp\u011btn\u00fd z\u00e1pis do origin\u00e1lu, jako je numpy pole. Pro \u0159ezy pol\u00ed byla zaji\u0161t\u011bna podpora nastavov\u00e1n\u00ed a z\u00edsk\u00e1v\u00e1n\u00ed hodnoty se skokem (slice(start, stop, step)).\n<li class=\"l\"> V pol\u00edch byla implementov\u00e1na podpora &#171;__reversed__&#187;.\n<li class=\"l\"> Vzory v Java pol\u00edch nyn\u00ed podporuj\u00ed API memoryview a byla odstran\u011bna z\u00e1vislost na numpy pro p\u0159ed\u00e1n\u00ed obsahu bufferu.\n<li class=\"l\"> Numpy ji\u017e nen\u00ed z\u00e1vislost\u00ed (extra) a p\u0159ed\u00e1n\u00ed pam\u011bti do numpy je nyn\u00ed dostupn\u00e9 bez kompilace s podporou numpy.\n<li class=\"l\"> JInterface je navr\u017een jako metaklas. Pro kontrolu rozhran\u00ed pou\u017eijte isinstance(cls, JInterface).\n<li class=\"l\"> Do v\u00fdchoz\u00edch import\u016f byly p\u0159id\u00e1ny chyb\u011bj\u00edc\u00ed TLD &#171;mil&#187;, &#171;net&#187; a &#171;edu&#187;.\n<li class=\"l\"> B\u011bhem spou\u0161t\u011bn\u00ed byly vylep\u0161eny chybov\u00e9 zpr\u00e1vy pro UnsupportedClassVersion.\n<li class=\"l\">    java.util.Map nyn\u00ed vyvol\u00e1v\u00e1 KeyError, pokud prvek nen\u00ed nalezen. Hodnoty, kter\u00e9 jsou nulov\u00e9, st\u00e1le vracej\u00ed None, jak se o\u010dek\u00e1v\u00e1. Pou\u017eijte get(), pokud je pot\u0159eba pr\u00e1zdn\u00e9 kl\u00ed\u010de zpracov\u00e1vat jako None.\n<li class=\"l\"> java.util.Collection byl odstran\u011bn, proto\u017ee byl podivn\u011b p\u0159et\u00ed\u017een mezi remove(Object) a remove(int) na Listech. Pro p\u0159\u00edstup k p\u016fvodn\u00edmu chov\u00e1n\u00ed Java pou\u017eijte metodu remove(), ale je doporu\u010deno p\u0159etypov\u00e1n\u00ed pro \u0159\u00edzen\u00ed p\u0159et\u00ed\u017een\u00ed.\n<li class=\"l\"> java.lang.IndexOutOfBoundsException nyn\u00ed m\u016f\u017ee b\u00fdt zachycena pomoc\u00ed t\u0159\u00eddy pro v\u00fdjimky IndexError p\u0159i p\u0159\u00edstupu k prvk\u016fm java.util.List.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52456\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0435\u043b\u0438\u0437 \u043f\u0440\u043e\u0441\u043b\u043e\u0439\u043a\u0438 JPype 0.7.2, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u043b\u043d\u044b\u0439 \u0434\u043e\u0441\u0442\u0443\u043f Python-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043a \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430\u043c \u043a\u043b\u0430\u0441\u0441\u043e\u0432 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Java. \u041f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 JPype \u0438\u0437 Python \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u0447\u043d\u044b\u0435 \u0434\u043b\u044f Java \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438, \u0441\u043e\u0437\u0434\u0430\u0432\u0430\u044f \u0433\u0438\u0431\u0440\u0438\u0434\u043d\u044b\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f, \u0441\u043e\u0447\u0435\u0442\u0430\u044e\u0449\u0438\u0435 \u043a\u043e\u0434 \u043d\u0430 Java \u0438 Python. \u0412 \u043e\u0442\u043b\u0438\u0447\u0438\u0435 \u043e\u0442 Jython, \u0438\u043d\u0442\u0435\u0433\u0440\u0430\u0446\u0438\u044f \u0441 Java \u0434\u043e\u0441\u0442\u0438\u0433\u0430\u0435\u0442\u0441\u044f \u043d\u0435 \u0447\u0435\u0440\u0435\u0437 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430 Python \u0434\u043b\u044f JVM, \u0430 \u0447\u0435\u0440\u0435\u0437 \u0432\u0437\u0430\u0438\u043c\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0435 \u043d\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-72012","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta 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