Jython

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Java implementation of Python

title: "Jython" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["jvm-programming-languages", "object-oriented-programming-languages", "python-(programming-language)-implementations", "scripting-languages", "software-using-the-python-software-foundation-license"] description: "Java implementation of Python" topic_path: "technology/programming-languages" source: "https://en.wikipedia.org/wiki/Jython" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Java implementation of Python ::

::data[format=table title="Infobox software"]

Field	Value
name	Jython
logo	Jython.png
logo size	100px
logo alt	Jython Logo
released	{{cite web
url	https://hg.python.org/jython/file/tip/NEWS
title	jython: 3d8067c56a1d NEWS
date	March 22, 2015
access-date	March 28, 2015
first1	Frank
last1	Wierzbicki}}
latest release version
operating system	Cross-platform
platform	Java virtual machine
programming language	Python and Java
genre	Python Interpreter
license	Python Software Foundation License (for older releases see License terms)
website
::

| name = Jython | logo = Jython.png | logo size = 100px | logo alt = Jython Logo | screenshot = | caption = | developer = | released = {{cite web |url = https://hg.python.org/jython/file/tip/NEWS |title = jython: 3d8067c56a1d NEWS |date = March 22, 2015 |access-date = March 28, 2015 |first1 = Frank |last1 = Wierzbicki}} | latest release version = | latest release date = | latest preview version = | latest preview date = | operating system = Cross-platform | platform = Java virtual machine | programming language = Python and Java | genre = Python Interpreter | license = Python Software Foundation License (for older releases see License terms) | website =

Jython is an implementation of the Python programming language designed to run on the Java platform. It was known as JPython until 1999. |url = https://wiki.python.org/jython/JythonFaq/GeneralInfo |title = JythonFaq/GeneralInfo - JythonWiki |date = April 3, 2014 |access-date = March 28, 2015}}

Overview

Jython programs can import and use any Java class. Except for some standard modules, Jython programs use Java classes instead of Python modules. Jython includes almost all of the modules in the standard Python programming language distribution, lacking only some of the modules implemented originally in C. For example, a user interface in Jython could be written with Swing, AWT or SWT. Jython compiles Python source code to Java bytecode (an intermediate language) either on demand or statically.

History

Jython was initially created in late 1997 to replace C with Java for performance-intensive code accessed by Python programs, moving to SourceForge in October 2000. The Python Software Foundation awarded a grant in January 2005. Jython 2.5 was released in June 2009.{{cite web |url=http://fwierzbicki.blogspot.com/2009/06/jython-250-final-is-out.html |title=Jython 2.5.0 Final is out! |date=June 16, 2009 |access-date=July 2, 2009 |last=Wierzbicki|first=Frank

Status and roadmap

The most recent release is Jython 2.7.4. It was released on August 18, 2024 and is compatible with Python 2.7.

Python 3 compatible changes are planned in Jython 3 Roadmap.

Although Jython implements the Python language specification, it has some differences and incompatibilities with CPython, which is the reference implementation of Python.{{cite web | url=https://wiki.python.org/jython/JythonFaq/GeneralInfo#IsJythonthesamelanguageasPython.3F | title=JythonFaq |publisher=Jython's project | access-date=July 5, 2009}}{{cite web | url=https://jython.sourceforge.net/archive/21/docs/differences.html | title=Differences between CPython and Jython | publisher=Jython's project | access-date=July 5, 2009 | archive-url=https://web.archive.org/web/20231007235503/https://jython.sourceforge.net/archive/21/docs/differences.html | archive-date=2023-10-07}}

License terms

From version 2.2 on, Jython (including the standard library) is released under the Python Software Foundation License (v2). Older versions are covered by the Jython 2.0, 2.1 license and the JPython 1.1.x Software License.{{cite web | url=https://www.jython.org/Project/license.html | title=The Jython License | publisher=Jython's project | access-date=February 9, 2008 | archive-date=October 9, 2018 | archive-url=https://web.archive.org/web/20181009152125/http://www.jython.org/Project/license.html | url-status=dead

The command-line interpreter is available under the Apache Software License.

Usage

JBoss Application Server's command line interface scripting using Jython
Oracle Weblogic Server Scripting Tool uses Jython
IBM Rational development tools allow Jython scripting
IBM WebSphere Application Server tool scripting with wsadmin allows using Jython and Jacl
ZK, a Java Ajax framework that allows glue logic written in Jython
Ignition, a software development platform focused on HMI and SCADA
Ghidra, a reverse engineering tool developed by the NSA allows plugins to be written in Java or Jython
openHAB, home automation software

References

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::