如何为Jython设置环境变量？

Question

I have set the variables JYTHON_HOME to the directory where I have installed Jython and JYTHON_PATH to the bin folder, but I still get the following error when I try to run jython:

'jython' is not recognized as an internal or external command,
operable program or batch file.

Why do I get this error? The Java installation has no issues.

Answer 1

You still need to add the path to the executable jython.bat to your PATH environment variable. Here as an example I'm providing my ini-jython.bat, which I use before executing my jython project (in this case it's a Django on Jython project, you can safely ignore the Django stuff, or adapt it to your needs):

set JYTHON_HOME=c:\tools\jython2.5.2
set PATH=%JYTHON_HOME%\bin;%PATH%
set CLASSPATH=dep1;dep1/lib/*;_lib/*
set JYTHONPATH=.;..\django-debug-toolbar;..\django-common
set DJANGO_SETTINGS_MODULE=site_projname.settings
set PYTHONPATH=%JYTHONPATH%
set manage=jython c:\tools\jython2.5.2\bin\django-admin.py
set makemessages=django-admin makemessages --extension html,py
set compilemessages=django-admin compilemessages

Answer 2

I am Windows user & I have installed Jython in C:\\jython2.7.0 .

What I had before?

I had niether set the JYTHON_HOME environment variable nor added %JYTHON_HOME%\\bin to PATH environment variable. I also got the same error as shown in the question.

How I fixed?

• I created new environment variable named JYTHON_HOME with value C:\\jython2.7.0 .

  You've to use your own Jython's installation folder.

• Then I added %JYTHON_HOME%\\bin to PATH environment variable as the below 2 image shows.

  Create new PATH environment variable if it is not already there (This is rare case).

• Open new Terminal and type jython , it will work. Now you can try executing simple Python statements as the below image shows.

  Do not use the already opened Terminal.

That's it.