pyje

pyje is an open-source software library designed to enable interoperability between Python and Java. It provides a bridge that allows Python programs to instantiate Java objects, invoke Java methods, and access Java libraries from within Python.

Technical approach: pyje embeds or attaches to the Java Virtual Machine and communicates with Java via the Java Native Interface (JNI). It manages type conversion between Python and Java, handles Java exceptions, and provides a synchronization model compatible with Python's GIL. It supports multi-threaded usage with careful JVM lifecycle management.

Usage: After installation, a Python program starts the JVM with pyje.start_jvm(...), optionally configuring classpath and options. Users can import Java classes, construct objects, and call methods. The library exposes proxy classes or wrappers to interact with Java types; it also supports conversion of common data types and handling of Java collections.

Security and licensing: pyje is released under an open-source license and is maintained by a community of contributors. It aims for cross-platform compatibility across major operating systems and Python/JVM runtimes.

See also: JPype, Py4J, JCC.