{"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\/it\/blog\/news\/reliz-jpype-0-7-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python","title":{"rendered":"Rilascio di JPype 0.7.2, libreria per l'accesso alle classi Java da Python","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\">\u00c8 disponibile<\/a><\/noindex> rilascio dello strato <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">JPype 0.7.2<\/a><\/noindex>, che consente l'accesso completo delle applicazioni Python alle librerie di classi in Java. Grazie a JPype, da Python \u00e8 possibile utilizzare librerie specifiche per Java, creando applicazioni ibride che combinano codice Java e Python. A differenza di Jython, l'integrazione con Java avviene non attraverso la creazione di una variante di Python per la JVM, ma attraverso l'interazione a livello di entrambe le macchine virtuali, utilizzando memoria condivisa. L'approccio proposto consente non solo di ottenere buone prestazioni, ma fornisce anche accesso a tutte le librerie CPython e Java. Il codice del progetto <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">\u00e8 distribuito<\/a><\/noindex> sotto licenza Apache 2.0.<\/p>\n<p>Variazioni principali:<\/p>\n<ul>\n<li class=\"l\"> Le eccezioni sollevate in codice C++ e Java ora forniscono uno stack di eccezioni quando si verifica un'eccezione nel codice Python. Pertanto, per ottenere informazioni sullo stack delle eccezioni da ora non \u00e8 pi\u00f9 necessario chiamare stacktrace().\n<li class=\"l\"> La velocit\u00e0 di ritorno nelle chiamate \u00e8 aumentata di tre volte.\n<li class=\"l\"> La velocit\u00e0 di trasferimento in modo sostanziale (di ordini di grandezza) \u00e8 aumentata<br \/>\nnelle buffer numpy degli array multidimensionali. I primitivi multidimensionali trasmettono copie di sola lettura, create all'interno della JVM con layout C continuo.<\/p>\n<li class=\"l\"> Tutti i componenti interni esposti sono stati sostituiti con implementazioni da CPython, e i simboli __javaclass__, __javavalue__ e __javaproxy__<br \/>\nsono stati rimossi. A tutti i tipi CPython ereditati dai tipi di classe jpype \u00e8 stato aggiunto uno slot Java dedicato. Tutte le tabelle private sono state trasferite a CPython. I tipi Java ora devono essere ereditati dalla metaclasse JClass, che utilizza slot di tipo. Le miscelazioni per le classi base di Python non sono consentite. I tipi Object, Proxy, Exception, Number e Array sono ereditati direttamente dalle implementazioni interne di CPython.<\/p>\n<li class=\"l\"> \u00c8 stato migliorato il tracciamento e la gestione delle eccezioni.\n<li class=\"l\"> Le fette di array vengono ora gestite come visioni, supportando la scrittura inversa nell'originale, come gli array numpy. Per le fette di array \u00e8 stato fornito supporto per impostare e ottenere valori con passo (slice(start, stop, step)).\n<li class=\"l\"> Negli array \u00e8 stata implementata la supporto per &#171;__reversed__&#187;.\n<li class=\"l\"> Negli array Java \u00e8 stato fornito il supporto per l'API memoryview e rimossa la dipendenza da numpy per il trasferimento del contenuto del buffer.\n<li class=\"l\"> Numpy ora non \u00e8 pi\u00f9 una dipendenza (extra) e il trasferimento di memoria in numpy \u00e8 disponibile senza compilazione con supporto per numpy.\n<li class=\"l\"> JInterface \u00e8 stato reso disponibile come metaclasse. Utilizzare isinstance(cls, JInterface) per controllare le interfacce.\n<li class=\"l\"> Negli import predefiniti sono stati aggiunti i TLD mancanti &#171;mil&#187;, &#171;net&#187; e &#171;edu&#187;.\n<li class=\"l\"> Durante il lancio, i messaggi di errore per UnsupportedClassVersion sono stati migliorati.\n<li class=\"l\">    java.util.Map ora restituisce KeyError se l'elemento non viene trovato. I valori che sono null continuano a restituire None come previsto. Usa get() se le chiavi vuote devono essere gestite come None.\n<li class=\"l\"> java.util.Collection \u00e8 stato rimosso poich\u00e9 era sovraccaricato in modo strano tra remove(Object) e remove(int) nelle liste. Usa il metodo Java remove() per accedere al comportamento originale di Java, ma il casting di tipo \u00e8 fortemente raccomandato per gestire il sovraccarico.\n<li class=\"l\"> java.lang.IndexOutOfBoundsException ora pu\u00f2 essere catturato tramite la classe di eccezione IndexError quando si accede agli elementi java.util.List.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <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 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" 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