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Thread: Jython interactive mode

  1. #1
    Super Moderator helloworld922's Avatar
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    Default Jython interactive mode

    Does anyone know how to run Jython with "interactive mode" (or whatever the correct terminology is, this is the terminology in Iron Python)? Basically, interactive mode is similar to running a regular script using the eval() method, but statements which evaluate to a result print out the result.

    So, for example:

    for i in range(5):
        i * i

    In interactive mode, i * i would print out to the script context output stream, so the output would look like:
    In non-interactive mode, nothing would be printed out.

    The higher-level purpose of this is I'm trying to create a Swing "command console" which emulates the standard Python command console, but can be added to Swing applications.

    Here's a short blurb of how I'm creating the Jython script engine and running the test script (note: you will need the Jython library, you can find it here. Java SE6 or newer is also required for the Java scripting classes).

    // runs the script, but interactive mode is not turned on
    ScriptEngine engine = new ScriptEngineManager().getEngineByName("python");
    String command = "for i in range(5):\r\n\ti * i";


    I figured out a work-around to this.

    Instead of using the Java API scripting, I created an InteractiveInterpreter part of the Jython package.

    InteractiveInterpreter engine = new InteractiveInterpreter();
    String command = "for i in range(5):\r\n\ti * i";

    Hopefully next month-ish I will put the whole code in the tips section (still a few things to work out)
    Last edited by helloworld922; July 17th, 2010 at 11:37 PM.

  2. #2
    mmm.. coffee JavaPF's Avatar
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    Default Re: Jython interactive mode

    Tricky! Glad you resolved this yourself helloworld because I didn't have much input
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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