Run python script using Pyrolite

lasidaputhunattil commented 9 years ago

Hi,

I have a simple python script in my local machine, which returns a string. I want to run this script from java application and get the return value. I'm trying to do this using Pyrolite. I downloaded the jar files and added them to my java class path. But I'm not able to run the script.

I got the below sample code from readme.txt

NameServerProxy ns = NameServerProxy.locateNS(null); PyroProxy remoteobject = new PyroProxy(ns.lookup("Your.Pyro.Object")); Object result = remoteobject.call("pythonmethod", 42, "hello", new int[]{1,2,3}); String message = (String)result; // cast to the type that 'pythonmethod' returns System.out.println("result message="+message); remoteobject.close(); ns.close();

But this is not working for me. My system configuration is

OS: Windows 8 JDK: jdk1.7.0_51 Python: 2.6

Please help me with this.

irmen commented 9 years ago

You're not very helpful. It's impossible to assist if you don't provide extra info such as:

the exact error message you're getting including stacktrace, if any
what did you expect to happen? what did you try by yourself already?
how does your server code look like and how are you running everything?

p.s. while Pyro still supports it, Python 2.6 is very old. Any particular reason you're still using this old version instead of 2.7 or 3.x?

p.p.s. you write : 'script on my local machine'. Is it just a single python script that you want to execute from within a Java program? Then Pyrolite is perhaps not the right choice, it is used to connect your Java program to a running python server process (possibly on a different machine) using the Pyro protocol.

lasidaputhunattil commented 9 years ago

Hi,

Sorry for providing insufficient information. This is what I tried till now:

    NameServerProxy ns = NameServerProxy.locateNS(null);
    PyroProxy remoteobject = new PyroProxy();
    Object result = remoteobject.call("C:\\trail.py", null);
    String message = (String)result; 
    System.out.println("result message="+message);
    remoteobject.close();
    ns.close();

but it is giving be following error: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) at java.net.AbstractPlainSocketImpl.connect(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.(Unknown Source) at java.net.Socket.(Unknown Source) at net.razorvine.pyro.PyroProxy.connect(PyroProxy.java:72) at net.razorvine.pyro.PyroProxy.internal_call(PyroProxy.java:196) at net.razorvine.pyro.PyroProxy.call(PyroProxy.java:161) at tryPyrolite.pyrotry.main(pyrotry.java:15)

Since the script is in my own local machine I thought this is enough, but something I'm missing out. Since our whole backend still work on Python 2.6, I cant upgrade my python.

Also my sample python script is this: import ctypes p=ctypes.create_string_buffer('Hello') print p.value

Please tell me if you need more information to help me out with this. I'm stuck with this from past 1 week.

irmen commented 9 years ago

Seems like you're confused as to what you want to do: you're using the wrong tool for the job.

Pyrolite is not for executing arbitrary python programs on the local machine. It is meant to connect over the network to a long running python process via the Pyro protocol.

My guess is you wanna use Runtime.exec() or ProcessBuilder instead.

irmen / Pyrolite

Run python script using Pyrolite #17