Re: [Jython-users] Question about compiling with Jython

[Jeff A. <ja...@fa...>]

Java definitely needs a main(). But, I will admit that I didn't know 
(didn't remember) that Jython puts one in there! Here it is:

PS nomain> javap '.\HelloWorld$py.class'
Compiled from "C:\Users\Jeff\Documents\Jython\270\nomain\HelloWorld.py"
public class HelloWorld$py extends org.python.core.PyFunctionTable implements org.python.core.PyRunnable {
   static HelloWorld$py self;
   static final org.python.core.PyCode f$0;
   public org.python.core.PyObject f$0(org.python.core.PyFrame, org.python.core.ThreadState);
   public HelloWorld$py(java.lang.String);
   public org.python.core.PyCode getMain();
   public static void main(java.lang.String[]);
   public static org.python.core.CodeBootstrap getCodeBootstrap();
   public org.python.core.PyObject call_function(int, org.python.core.PyFrame, org.python.core.ThreadState);
}

Thanks for asking the question.

Jeff Allen

On 02/10/2018 05:16, Ted Larson Freeman wrote:
> Hi, Jeff.
>
> Another list member replied directly yesterday with this answer, which 
> solved my issue:
>
> java -cp /opt/jython2.7.0/jython.jar:. HelloWorld\$py
>
> I needed the full path to the jar as well as the ":." to include the 
> current working directory.
>
> And you're right that the classpath must come first. Several examples 
> I tried all worked, even just a single print statement. So it must not 
> be a requirement to have a main() in the Python script itself.
>
> Thanks for your analysis.
>
> Ted
>
> PS. I didn't realize until now that the message I referred to above 
> had not been cc'ed to this list.
>