{"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\/pt\/blog\/news\/reliz-jpype-0-7-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python","title":{"rendered":"Lan\u00e7amento do JPype 0.7.2, biblioteca para acessar classes Java a partir do 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\">Dispon\u00edvel<\/a><\/noindex> lan\u00e7amento da camada <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">JPype 0.7.2<\/a><\/noindex>, que permite acesso completo a bibliotecas de classes em Java a partir de aplica\u00e7\u00f5es Python. Com o JPype, \u00e9 poss\u00edvel utilizar bibliotecas espec\u00edficas de Java, criando aplica\u00e7\u00f5es h\u00edbridas que combinam c\u00f3digo em Java e Python. Ao contr\u00e1rio do Jython, a integra\u00e7\u00e3o com Java n\u00e3o \u00e9 feita atrav\u00e9s da cria\u00e7\u00e3o de uma vers\u00e3o do Python para a JVM, mas atrav\u00e9s de intera\u00e7\u00e3o entre as duas m\u00e1quinas virtuais, utilizando mem\u00f3ria compartilhada. A abordagem proposta permite n\u00e3o apenas um bom desempenho, mas tamb\u00e9m acesso a todas as bibliotecas do CPython e do Java. O c\u00f3digo do projeto <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">\u00e9 distribu\u00eddo<\/a><\/noindex> est\u00e3o sob a licen\u00e7a Apache 2.0.<\/p>\n<p>Principais mudan\u00e7as:<\/p>\n<ul>\n<li class=\"l\"> Exce\u00e7\u00f5es lan\u00e7adas em c\u00f3digos C++ e Java agora fornecem um rastreamento de exce\u00e7\u00f5es ao ocorrer uma exce\u00e7\u00e3o no c\u00f3digo Python. Assim, para obter informa\u00e7\u00f5es sobre o rastreamento de exce\u00e7\u00f5es, n\u00e3o \u00e9 mais necess\u00e1rio chamar stacktrace().\n<li class=\"l\"> A velocidade de retorno durante as chamadas foi triplicada.\n<li class=\"l\"> A velocidade de transfer\u00eancia foi significativamente aumentada (por ordens de magnitude) em<br \/>\nbuffers numpy de arrays multidimensionais. Os primitivas multidimensionais transmitem c\u00f3pias apenas para leitura, criadas dentro da JVM com layout cont\u00ednuo em C.<\/p>\n<li class=\"l\"> Todos os componentes internos foram substitu\u00eddos por implementa\u00e7\u00f5es do CPython, e os s\u00edmbolos __javaclass__, __javavalue__ e __javaproxy__<br \/>\nforam removidos. Todos os tipos do CPython herdados dos tipos de classe jpype agora t\u00eam um slot Java dedicado. Todas as tabelas privadas foram transferidas para o CPython. Tipos Java agora devem herdar do metaclasse JClass, que utiliza slots de tipos. Mixins para classes base do Python n\u00e3o s\u00e3o permitidas. Os tipos Object, Proxy, Exception, Number e Array s\u00e3o herdados diretamente das implementa\u00e7\u00f5es internas do CPython.<\/p>\n<li class=\"l\"> O rastreamento e o tratamento de exce\u00e7\u00f5es foram aprimorados.\n<li class=\"l\"> Os cortes de arrays agora s\u00e3o tratados como visualiza\u00e7\u00f5es que suportam a grava\u00e7\u00e3o de volta no original, como um array numpy. Para cortes de arrays, o suporte para definir e obter valores com passo (slice(start, stop, step)) foi garantido.\n<li class=\"l\"> As matrizes implementaram o suporte \u00e0 &#171;__reversed__&#187;.\n<li class=\"l\"> Em arrays Java, o suporte ao API memoryview foi adicionado e a depend\u00eancia do numpy para a transmiss\u00e3o do conte\u00fado do buffer foi removida.\n<li class=\"l\"> Numpy agora n\u00e3o \u00e9 uma depend\u00eancia (extra) e a transmiss\u00e3o de mem\u00f3ria para o numpy est\u00e1 dispon\u00edvel sem compila\u00e7\u00e3o com suporte a numpy.\n<li class=\"l\"> JInterface foi estruturado como um metaclasse. Use instanceof(cls, JInterface) para verificar interfaces.\n<li class=\"l\"> Os imports padr\u00e3o foram adicionados os TLDs que faltavam &#171;mil&#187;, &#171;net&#187; e &#171;edu&#187;.\n<li class=\"l\"> Mensagens de erro melhoradas durante a execu\u00e7\u00e3o para UnsupportedClassVersion.\n<li class=\"l\">    java.util.Map agora lan\u00e7a KeyError se o elemento n\u00e3o for encontrado. Valores que s\u00e3o nulos ainda retornam None como esperado. Use get() se chaves vazias precisarem ser tratadas como None.\n<li class=\"l\"> java.util.Collection foi removido, pois estava estranhamente sobrecarregado entre remove(Object) e remove(int) em Listas. Use o m\u00e9todo Java remove() para acessar o comportamento original do Java, mas a convers\u00e3o de tipo \u00e9 estritamente recomendada para gerenciar a sobrecarga.\n<li class=\"l\"> java.lang.IndexOutOfBoundsException agora pode ser capturada usando a classe de exce\u00e7\u00f5es IndexError ao acessar elementos de 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 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d 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