{"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\/en\/blog\/news\/obnovlenie-jpype-1-0-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python","title":{"rendered":"Update JPype 1.0.2, a library for accessing Java classes from 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\">Available<\/a><\/noindex> new layer release <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">JPype 1.0.2<\/a><\/noindex>, allowing full access for Python applications to Java class libraries. With JPype, you can use Java-specific libraries from Python, creating hybrid applications that combine Java and Python code. Unlike Jython, integration with Java is not achieved by creating a Python variant for the JVM but through interaction at the level of both virtual machines using shared memory. The proposed approach allows not only for good performance but also provides access to all CPython and Java libraries. The project code <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">is distributed<\/a><\/noindex> under the Apache 2.0 license.<\/p>\n<p>Key Changes:<\/p>\n<ul>\n<li class=\"l\"> Method calls now include caching to avoid overload resolution, significantly reducing the performance overhead of method resolution, especially when the same overload is called multiple times, as during the execution of loops.\n<li class=\"l\"> The transfer of lists, tuples, and buffers to Java primitive arrays has been accelerated from 4 to 100 times, depending on the data type. The conversion uses optimized in-memory buffer processing instead of the Sequence API. When encountering a Python buffer, only the first element is checked for conversion as the data buffers are homogeneous.\n<li class=\"l\"> Shutdown operations handling (implemented back in JPype 1.0.0 but missed in the changelog). JPype now invokes the JVM shutdown procedure, which attempts to exit gracefully. This results in several behavioral changes. Non-background threads (proxy call) can now keep the JVM open until they are completed. Proxy calls will handle shutdown until the call completes, but will receive an interruption message. Files are now properly closed and data is flushed to disk if threads handle exceptions appropriately. Resource cleanup hooks and finalizers are executed. AtExit hooks are called upon thread generation. Automatic thread joining is implemented via a daemon when using the JVM from Python. Erroneous code that cannot properly handle thread cleanup is likely to hang during shutdown. Additional documentation is available in the usage guide.\n<li class=\"l\"> The wrapper for Throwable received the wrapper for Object instead of the expected result, leading to strange conversions from Python classes.\n<li class=\"l\"> Typos in the import system that led to the error output \u2018jname not found\u2019 have been fixed.\n<li class=\"l\"> Proper propagation of \u2018^C\u2019 in KeyboardInterrupt has been ensured.\n<li class=\"l\"> Fixed an issue with characters from Python 3.5.3. PySlice_Unpack was introduced in the subsequent patch release (3.5.4) and should not have been used.\n<li class=\"l\"> Fixed a bug with numpy.linalg.inv that caused crashes. The issue was traced to thread interaction between the JVM and certain numpy variants. The proposed solution is to call numpy.linalg.inv before starting the JVM.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Source: <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 5.0.2 - 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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