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PROGRAM:

NAME


jython - Python seamlessly integrated with Java

SYNOPSIS


jython [ -i ] [ -S ] [ -v ] [ -Dproperty=value ... ] [ -Wargument ]
[ -Ecodec ] [ -Qargument ]
[ -jar jar | -c cmd | file | - ] [ script-args ]

jython [ --help | --version ]

DESCRIPTION


Jython is an implementation of the high-level, dynamic, object-oriented language Python
seamlessly integrated with the Java platform. The predecessor to Jython, JPython, is
certified as 100% Pure Java.

Jython is complementary to Java and is especially suited for the following tasks:

Embedded scripting:
Java programmers can add the Jython libraries to their system to allow end users to
write simple or complicated scripts that add functionality to the application.

Interactive experimentation:
Jython provides an interactive interpreter that can be used to interact with Java
packages or with running Java applications. This allows programmers to experiment
with and debug any Java system using Jython.

Rapid application development:
Python programs are typically 2-10X shorter than the equivalent Java program. This
translates directly to increased programmer productivity. The seamless interaction
between Python and Java allows developers to freely mix the two languages both
during development and in shipping products.

To make a jython script executable on your system you can add the following line to the
top of the file:

#!/usr/bin/env jython

You will also need to add execute permissions to the script using chmod(1). Note that
#!/usr/bin/jython will not work; you must use #!/usr/bin/env jython. This is because
/usr/bin/jython is a script itself, not a compiled binary.

OPTIONS


A summary of options is included below.

-i Continue running Jython interactively after running the given script, and force
prompts even if standard input doesn't appear to be a terminal.

-S Don't imply import site on initialisation.

-v Trace import statements on error output.

-Dproperty=value
Set the Jython property property to value; see jython.conf(5) for details of
available properties.

-Wargument
Warning control. The full form of argument is action:message:category:module:line.
Trailing empty fields may be omitted. Multiple -W options may be given. See
documentation of the warnings module for details.

-Ecodec
Set the encoding used to read module source files from disk.

-Qargument
Division control. See PEP 239 for details. Valid arguments are old, new, warn and
warnall.

-jar jar
The program to run is read from the file __run__.py in the specified jar archive.

-c cmd The program to run is passed as the cmd string. This option terminates the options
list.

file The program to run is the script file.

- The program to run is read from standard input (default behaviour). Interactive
mode is used if running on a tty. This flag allows you to pipe a file into Jython
and have it be treated correctly.

script-args
Command-line arguments to pass to the Jython script in sys.argv[1:].

--help Print a usage message and exit.

--version
Print the Jython version number and exit.

ENVIRONMENT VARIABLES


JAVA (default: /usr/bin/java)
The Java interpreter to use when running Jython.

JAVA_OPTIONS (default: empty)
Options to pass to the Java interpreter when running Jython.

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