Jython Listed By `getenginefactories`, But `getenginebyname("jython")` Is `null`

Question

I created a default Maven Java project and added the following dependency: org.pythonjython

Solution 1:

Here is one workaround:

Add this at the top:

import org.python.core.Options;

Before invoking getEngineByName, set

Options.importSite = false;

Then the engine is created without problems.

Got the solution from this conversation.

Another solution that works well (proposed by mzjn in the comments) is to replace the jython artifact by jython-standalone.

Baca Juga

Solution 2:

You either need to disable importSite with python Options, as you already discovered. Or, set the python.home to where you have extracted jython. I have it extracted in my home folder under jython2.7.0; adding this,

System.setProperty("python.home", newFile(
        System.getProperty("user.home"), "jython2.7.0").getPath()
);

allows python to discover the correct PYPATH so it can build the python environment.

Solution 3:

One way to fix this is to set the env var jythonpath to include the specific Lib directory you need for your instance (and include the Lib\site-packages as well to avoid further issues with specific packages)

Getting Started with Python

Jython Listed By `getenginefactories`, But `getenginebyname("jython")` Is `null`

Solution 1:

Solution 2:

Solution 3:

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