{"id":90484,"date":"2020-08-01T13:42:39","date_gmt":"2020-08-01T11:42:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-jpype-1-0-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python"},"modified":"2020-08-01T13:42:39","modified_gmt":"2020-08-01T11:42:39","slug":"obnovlenie-jpype-1-0-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python","status":"publish","type":"post","link":"https:\/\/prohoster.info\/no\/blog\/news\/obnovlenie-jpype-1-0-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python","title":{"rendered":"Oppdatering av JPype 1.0.2, et bibliotek for tilgang til Java-klasser fra Python","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/releases\/tag\/1.0.2\">Tilgjengelig<\/a><\/noindex> ny utgave av laget <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">JPype 1.0.2<\/a><\/noindex>, som gir full tilgang til Python-applikasjoner for Java-biblioteker. Med JPype kan Python bruke Java-spesifikke biblioteker, og lage hybride applikasjoner som kombinerer kode fra Java og Python. I motsetning til Jython oppn\u00e5s integrasjon med Java ikke ved \u00e5 lage en versjon av Python for JVM, men ved interaksjon p\u00e5 niv\u00e5et til begge virtuelle maskiner, med delt minne. Den foresl\u00e5tte tiln\u00e6rmingen gj\u00f8r det mulig \u00e5 oppn\u00e5 god ytelse og gir tilgang til alle CPython- og Java-biblioteker. Koden for prosjektet <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">distribueres<\/a><\/noindex> under Apache 2.0-lisensen.<\/p>\n<p>Hovedendringer:<\/p>\n<ul>\n<li class=\"l\"> Metodekall har f\u00e5tt en cache som unng\u00e5r lastoppl\u00f8sninger, noe som betydelig reduserer p\u00e5virkningen p\u00e5 ytelsen til metodeoppl\u00f8sninger, spesielt n\u00e5r den samme overbelastningen kalles mange ganger, som under l\u00f8kkekj\u00f8ring.\n<li class=\"l\"> Overf\u00f8ring av lister, tupler og buffere til Java primitive matriser er akselerert fra 4 til 100 ganger, avhengig av datatypen. Konverteringen bruker optimalisert bufferbehandling i minnet, i stedet for Sequence API. N\u00e5r Python-bufferet m\u00f8tes, sjekkes kun det f\u00f8rste elementet for konvertering, siden dataleveransene er homogene.\n<li class=\"l\"> Behandling av shutdown-operasjoner (implementert i JPype 1.0.0, men oversett ved forberedelse av endringslisten). JPype kaller n\u00e5 shutdown-prosedyren til JVM, som pr\u00f8ver \u00e5 avslutte p\u00e5 en &#171;grasi\u00f8s&#187; m\u00e5te. Dette f\u00f8rer til flere endringer i oppf\u00f8rselen. Ingen bakgrunnstr\u00e5der (proxy-kall) kan n\u00e5 holde JVM \u00e5pen til de er fullf\u00f8rt. Proxy-kall vil h\u00e5ndtere shutdown s\u00e5 lenge kallet ikke er helt fullf\u00f8rt, men vil motta en avbrytelsesmelding. Filer lukkes n\u00e5 som de skal og skriver data til disk (flush), hvis tr\u00e5dene h\u00e5ndterer unntak p\u00e5 riktig m\u00e5te. Rydding av ressurser og finalizere utf\u00f8res. AtExit-hooker kalles n\u00e5r tr\u00e5der opprettes. Det er implementert automatisk tilknytning av tr\u00e5der ved bruk av JVM fra Python via daemon. Feilkode som ikke kan h\u00e5ndtere tr\u00e5dopprydning riktig, kan l\u00e5se seg under shutdown. Ytterligere dokumentasjon finnes i bruksanvisningen.\n<li class=\"l\"> Wrapper for Throwable fikk en wrapper for Object i stedet for forventet resultat, noe som f\u00f8rte til merkelige konverteringer fra Python-klasser.\n<li class=\"l\"> Rettet skrivefeil i importsystemet, som f\u00f8rte til \u00e5 f\u00e5 ut feilen &#8216;&#187;jname&#187; not found&#8217;.\n<li class=\"l\"> Korrekt fremming av &#171;^C&#187; i KeyboardInterrupt.\n<li class=\"l\"> Problemet med symboler med Python 3.5.3 er l\u00f8st. PySlice_Unpack ble introdusert i den p\u00e5f\u00f8lgende patch-utgivelsen (3.5.4) og burde ikke ha blitt brukt.\n<li class=\"l\"> L\u00f8st en feil med numpy.linalg.inv som f\u00f8rte til krasj. Problemet ble sporet til interaksjonen mellom tr\u00e5dene til JVM og noen versjoner av numpy. Det foresl\u00e5tte l\u00f8sningen er \u00e5 kalle numpy.linalg.inv f\u00f8r JVM startes.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Kilde: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53469\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u043e\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0441\u043b\u043e\u0439\u043a\u0438 JPype 1.0.2, \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 [&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-90484","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u043e\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0441\u043b\u043e\u0439\u043a\u0438\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri 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