How to call method of python file using java

Question

My python File has the code as:

class myPythonClass():
def abc(self):
    print "calling abc"
    tmpb = {}
    tmpb = {'status' : 'SUCCESS'}
    return tmpb

and my java code is:

 PythonInterpreter interpreter = new PythonInterpreter();
             interpreter.execfile("/home/Desktop/abc.py");
             interpreter.set("myvariable", file1);
             PyObject answer = interpreter.eval("myPythonClass().abc(myvariable)");
             System.out.println(answer.toString());

In my python file if i dont give brackets for class name then my java code executes python file. But if my python file starts with class myPythonClass(): then its not working. Can anyone help me out in this?

"its not working". How? Any error messages? Weird behavior? Unexpected output? — hlt, Nov 30 '15 at 13:43

score 0 · Answer 1 · answered Nov 30 '15 at 13:44

0

Try identing:

class myPythonClass():
    def abc(self):
        print "calling abc"
        tmpb = {}
        tmpb = {'status' : 'SUCCESS'}
        return tmpb

It seems it isn't indented so it doesn't becomes part of the class declaration and Python doesn't likes that. But I know nothing about Java so...

Also try starting with a comment (#comment) and see if it works.

PS: Sorry if I wasn't clear or sure, I just can't comment with the reputation I has.

answered Nov 30 '15 at 13:44

wallabra

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8
17

No its indented properly at my side – bjk Nov 30 '15 at 13:46
Its saying source file attachment does not contain file_bullitin class – bjk Nov 30 '15 at 13:47
My bad. It seems it don't have a built-in class file (my guess). But as I said, I know nothing about Java. – wallabra Nov 30 '15 at 13:48

score 0 · Answer 2 · edited May 23 '17 at 12:23

Can you have a look at how-to-call-a-python-method-from-a-java-class.

Until your python code is correct and intended correctly. If I read the docs right, you can just use the eval function: :)

interpreter.execfile("/path/to/python_file.py");
PyDictionary result = interpreter.eval("myPythonClass().abc()");

Or if you want to get a string:

PyObject str = interpreter.eval("repr(myPythonClass().abc())");
System.out.println(str.toString());

If you want to supply it with some input from Java variables, you can use set beforehand and than use that variable name within your Python code:

interpreter.set("myvariable", Integer(21));
PyObject answer = interpreter.eval("'the answer is: %s' % (2*myvariable)");
System.out.println(answer.toString());

How to call method of python file using java

2 Answers2